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Article

Effects of Rowing on Cardiac Function in Breast Cancer Survivors: Sliding Seat Rowing vs. Fixed Seat Rowing

by
Juan Gavala-González
1,2,
Mateo Real-Pérez
2,*,
Juan Gamboa-González
2 and
José Carlos Fernández-García
2,3
1
Department of Physical Education and Sports, Universidad de Sevilla, 41013 Sevilla, Spain
2
Researching in Sport Science: Grupo de investigación (CTS-563) del Plan Andaluz de Investigación, Universidad de Sevilla, 41003 Sevilla, Spain
3
Department of Didactics of Languages, Arts and Sport, Universidad de Málaga, Andalucía-Tech, IBIMA, 29010 Málaga, Spain
*
Author to whom correspondence should be addressed.
Appl. Sci. 2024, 14(14), 6239; https://doi.org/10.3390/app14146239
Submission received: 2 July 2024 / Revised: 15 July 2024 / Accepted: 16 July 2024 / Published: 18 July 2024
(This article belongs to the Special Issue Human Performance and Health in Sport and Exercise)
Browse Figures
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Abstract

This longitudinal study aimed to analyze the effects of a team rowing-based training program on physical fitness and anthropometric parameters in female breast cancer survivors (n = 40; 56.78 ± 6.38 years). Participants were divided into two groups: one rowed in fixed seat rowing (FSR) boats (n = 20; 56.35 ± 4.89 years) and the other in sliding seat rowing (SSR) boats (n = 20; 57.20 ± 7.7 years). Both groups engaged in two 75-min sessions per week for 24 weeks. Significant improvements were observed in both groups in resting heart rate (FSR: −10.65 bpm; SSR: −8.45 bpm), heart rate at the beginning of the 6-min walk test (6 MWT) (FSR: −10.7 bpm; SSR: −11.25 bpm), and heart rate at the end of the test (FSR: −13.85 bpm; SSR: −20.35 bpm). Blood pressure improved significantly in both diastolic blood pressure (FSR: −12.35 mmHg; SSR: −19.25 mmHg) and systolic blood pressure (FSR: −13 mmHg; SSR: −16.95 mmHg). Additionally, both groups increased the distance covered in the 6 MWT (FSR: +63.05 m; SSR: +93.65 m). These results suggest that a rowing training program is a viable and safe activity for female breast cancer survivors, improving cardiac function, blood pressure, and cardiorespiratory capacity, particularly in sliding seat boats.

1. Introduction

The evolution of scientific knowledge is changing the paradigm of cancer from diagnosis and subsequent pharmacological treatment to a holistic and multidisciplinary approach that treats the individual through comprehensive therapeutic programs. In this regard, physical exercise has been postulated to play an important role in protecting against cancer [1]. As an example, it has been noted that the risk of breast cancer-related mortality appears to be significantly lower among survivors who adopt a physically active routine, in contrast to those who lead a sedentary lifestyle [2].
Breast cancer represents the most prevalent type of cancer in women, with 2.3 million diagnoses in 2020, and is the leading cause of cancer-related deaths in the female population on a global scale [3]. Despite this, the survival rate is close to 90% in most countries, so there is a high number of women who survive the disease for at least 5 years after initial treatment [4,5]. However, despite this high survival rate, it is important to note that the side effects associated with the disease and its treatment, such as cancer-related fatigue [6], lymphedema [7], cardiovascular disease [8,9], loss of bone mass [10], or psychological problems such as anxiety or depression [11], can persist for long periods of time, ranging from months to years.
If we focus on the side effects produced or exacerbated by the treatment of oncological diseases, we find that cardiovascular diseases and breast cancer share numerous risk factors such as age, diet, family history, alcohol consumption, obesity and overweight, level of physical activity, and tobacco use [8]. Yet, they share an even more relevant common risk factor, since current breast cancer treatments, based on chemotherapy, radiotherapy, and endocrine therapies, have a potentially deleterious effect related to cancer-induced cardiotoxicity and, consequently, to the development of cardiovascular disease [8,9]. Therefore, there is a need to examine which types of complementary non-pharmacological interventions can help to reduce the risk of developing cardiovascular disease in female breast cancer survivors.
The diagnosis of cancer is often accompanied by drastic changes in a person’s life. Taking into account that the lifestyle adopted can positively influence the chances of survival of the disease [12], as well as protect against the possible sequelae of treatment [13,14], scientific evidence has shown that engaging in physical exercise can reduce the onset of symptoms associated with cancer treatment and improve physical fitness and mental health [1,6,15,16]. This research has shown that a controlled training program can produce significant improvements in aerobic capacity, as well as an increase in muscle mass and strength, in addition to improving functionality of the upper limbs in women with breast cancer [17,18,19,20]. The majority of the studies consulted affirm that physical activity positively influences health status, mood, and body composition, positively affecting the quality of life of survivors [15,16,21,22,23].
Despite the proven benefits of exercise and its positive impact on the health of women with breast cancer [1,8,24,25], the level of physical activity is significantly reduced during cancer treatment [26], and remains even lower than it was before diagnosis [25]. Unfortunately, studies have shown that women who have been diagnosed with breast cancer decrease their physical activity by 11%, falling even further in those who are treated with chemotherapy (50%) and radiotherapy (24%), compared to untreated women [26]. Fatigue, low motivation, kinesiophobia, fear of lymphedema, and difficulties in accessing sports facilities are the main barriers to participation in physical activities in cancer patients [4].
Additionally, we must also consider that persistent chronic pain and sensory changes are common sequelae following breast cancer surgery. Studies report that between 20% and 60% of women experience persistent pain, primarily felt in the anterior chest, arms, and axillae after breast cancer surgery, significantly worsening their quality of life [27,28]. This pain has a neuropathic character and is often attributed to the sectioning of the intercostobrachial nerve (ICBN), which frequently occurs during treatments involving lymphatic axillary dissection. This results in numbness of the upper limb and thoracic wall, and restriction of upper limb movement [29,30]. In this context, physical activity and physiokinetotherapy techniques can serve as fundamental tools in preventing associated problems and preserving mobility and muscle strength, improving functionality, posture, and reducing the risk of lymphedema in the areas most affected by this disease [31,32]. Therefore, it is important to promote strategies and activities that encourage adherence to physical activity, even during the treatment of the disease [33].
Within this context, programs based on rowing have now emerged as a possible non-pharmacological therapy to ameliorate the side effects of cancer and to slow the decline associated with cancer and its treatment [4,7,34,35]. Rowing is a water sport in which a boat is propelled by the use of oars. In this discipline, rowers use the oars as second-degree levers, moving them in the opposite direction to the forward motion of the boat. Some of the benefits associated with this type of rowing-based exercise indicate an improvement in the physical condition of the participants [4,36], mental and psychological health [37,38,39], prevention of lymphedema [7,40], and ultimately, an improvement in the quality of life of women rowers [4,34,35].
It is important to note that there are two main types of rowing: sliding seat rowing (SSR), characterized by movement of the seats to facilitate leg thrust, and fixed seat rowing (FSR), in which the rowers remain in a static seat during the exercise [41]. There are clear biomechanical differences in the technical movements between the two modalities, particularly with regard to the upper limbs. In FSR, overhead shoulder flexion is required to execute the necessary movements. In contrast, in SSR, the movement of the arms is performed at shoulder height, which helps to reduce the strain on the upper extremities and trunk [35].
Rowing was chosen because it involves the muscles of both the upper and lower extremities, as well as virtually every muscle in the body. Nevertheless, the distinguishing feature that sets it apart from most other sports is the cyclic and alternating action of flexion and extension of the upper and lower extremities, as well as the involvement of the stabilizing muscles of the trunk and back during the different phases of rowing [42,43].
Currently, limited evidence is available on the impact of rowing on cardiac function and blood pressure in breast cancer survivors [44]. Therefore, the aim of the following study will be to examine the influence of a rowing-based training program on cardiac function and aerobic capacity in female breast cancer survivors, as well as to compare the influence of boat type on the possible cardiovascular adaptations.

2. Materials and Methods

2.1. Design and Participants

This research is part of concurrent clinical trials. To support this, a 24-week training regimen, conducted twice a week, was developed for use in both FSR and SSR boats (Figure 1). Various breast cancer support groups were approached and given the opportunity to participate in a free 24-week rowing program, which included physical evaluations at the beginning and conclusion of the program. The only criteria for participation were a history of breast cancer and approval from their oncologist to engage in moderate physical activity.
The participants (n = 40), aged 56.78 ± 6.38 years, were recruited on the condition that they had been diagnosed with breast cancer 6.58 ± 5.72 years previously, with varying degrees of involvement and with subsequent surgery, as shown in Table 1.
After the initial selection, the nature of the study was explained to the participants, indicating that their anonymity would be maintained at all times, following the ethical considerations of Sport and Exercise Science Research [45] and with the principles included in the Declaration of Helsinki [46], which define the ethical guidelines for research in humans. The University of Malaga provided the identification number registered for the Ethics Committee: 65-2020-H, and the participants (Figure 2) provided written informed consent. Throughout the intervention and subsequently, we acted under the provisions of organic law 3/2018, of December 5, on the Protection of Personal Data and Guarantee of Digital Rights, regarding the protection of personal data under Spanish legislation.

2.2. Instruments

A Tanita model BC730 scale (Tanita Corporation, Tokyo, Japan), accuracy 0.1 kg, was used to weigh the subjects, and a SECA model 213 portable measuring rod (Seca GmbH & Co. KG, Hamburg, Germany), accuracy 0.1 cm, was used to measure height. The 6-min walk test was used to evaluate cardiac function, which is a valid and reliable test that assesses a person’s cardiorespiratory capacity by measuring the maximum distance they can walk on a flat surface in 6 min. At the same time, heart rate per minute was monitored immediately before and after finishing the test using a Polar H10 chest strap (Polar Electro Oy, Kempele, Finland), which was fitted before the start of the test and transmitted the signal to the POLAR tablet application. For blood pressure measurement, the Omron M6 Comfort IT brachial blood pressure monitor (Omron Healthcare Co., Ltd., Kyoto, Japan) was used, which indicates systolic and diastolic blood pressure and pulse rate per minute.

2.3. Procedure

Among all the women who expressed interest, a series of physical fitness assessments were conducted. With equivalent anthropometric measurements (weight, height, BMI) and test results, a participant was assigned to one group (FSR or SSR). The participant with the most comparable results was assigned to the other group (SSR or FSR). Subjects participating in the study already engaged in moderate and regular physical activity. The participants were thus divided into two training groups with similar characteristics (Table 2):
The 24-week rowing training program was divided into three 4-week stages. These stages progressively increased in intensity and were adjusted through the participants’ subjective perception of effort using the Börg scale [47].
  • Initial phase with mobility exercises, proprioceptive exercises, and postural control exercises. Main phase with rowing training. Final phase with stretching. Börg scale 5–6.
  • Intermediate phase with mobility exercises, proprioceptive exercises, and postural control exercises. Main phase with rowing training. Final phase with stretching. Börg scale 6–7.
  • Final phase with mobility exercises, proprioceptive exercises, and postural control exercises. Main phase with rowing training. Final phase with stretching. Börg scale 7–8.
Throughout the program, there were 2 days of training per week. Each session lasted 75 min. These sessions were supervised by a trainer who ensured attendance, correct execution of the tasks, and intensity of the sessions, in addition to excluding from the study those subjects who did not achieve at least 90% participation. Each training session had the same structure:
  • Initial part performed with warm-up, mobility, proprioceptive, and postural control exercises, all performed in a multipurpose room (5–10 min).
  • Cool down: Flexibility exercises to relax the muscles and bring the body back to its initial state after the effort (10–15 min).

2.4. Data Analysis

All analyses were performed with the IBM SPSS Statistics 25 statistical package. The significance level was set at p < 0.05. The adjustment of the different variables to the normal distribution was assessed by both graphic procedures and the Shapiro–Wilk test.
To determine whether there were differences as a result of the rowing training undertaken by the participants, the medians of each variable pre- and post-intervention were analyzed using the Wilcoxon test for related samples (paired data). In addition, the graphic analysis of the different variables was performed using boxplots or box and whisker plots. To analyze whether there were differences according to the rowing training performed by the participants, the data from the pre-test and post-test measurements were compared through the different tests. The estimated between-subject marginal means (Boat*Measurement) and the standard deviation were considered when quantifying the interaction between the variables and their longitudinal evolution through a repeated-measures ANOVA, applying the Bonferroni post hoc test.

3. Results

Table 3 shows the evolution of the results obtained after carrying out the rowing-based training protocol taking into account the measurements in both groups. There was a significant improvement in the mean values for cardiac variables, blood pressure and cardiorespiratory capacity after the intervention program.
If we look at the differences obtained according to the type of vessel used in the training program (Table 4), we see that both the subjects who performed FSR and those who performed SSR significantly improved all the parameters related to cardiac function and cardiorespiratory capacity. Furthermore, in the SSR group, better results were obtained after the intervention protocol in all the variables of the study compared to the FSR group (Initial HR, Final HR, Diastolic BP, Systolic BP and the 6-min walk test [6 MWT]), except in Rest HR, which also shows a positive evolution.
An in-depth analysis of the results is shown in Figure 3, considering the type of boat used in the training protocol and the evolution of the variables associated with cardiac function at rest, before starting the 6 MWT and at the end of the test. Both groups had significant improvements in resting heart rate (FSR: Δpre-post Rest HR = −10.65; p = 0.000; SSR: Δpre-post Rest HR = −8.45; p = 0.000), initial rate before the test (FSR: Δpre-post Initial HR = −10.7; p = 0.000; SSR: Δpre-post Initial HR = −11.25; p = 0.000) and final rate after the test (FSR: Δpre-post Final HR = −13.85; p = 0.000; SSR: Δpre-post Final HR = −20.35; p = 0.000).
Figure 4 provides the blood pressure measurements obtained before and after the 6 MWT. Both the FSR and SSR groups showed significant improvements in systolic (FSR: Δpre-post Systolic BP = −13; p = 0.000; SSR: Δpre-post Systolic BP = −16.25; p = 0.000) and diastolic (FSR: Δpre-post Diastolic BP = −12.35; p = 0.000; SSR: Δpre-post Diastolic BP = −19.25; p = 0.000) blood pressure, although these improvements were slightly greater in the women who rowed in the SSR group.

4. Discussion

In recent years, therapeutic programs based on rowing have been proposed as a type of non-pharmacological strategy that modulates adverse effects in female breast cancer survivors by involving moderate-intensity physical exercise that combines aerobic and muscle strength training [35]. The potential of this activity lies in a viable, sustainable, and safe model that can be tolerated by different age groups [7,35,44]. Consequently, recent studies have shown, after 4 years of follow-up, that women who participated in dragon boat training were able to maintain their cardiac parameters within normal ranges for their age (compared to healthy active individuals), despite chemotherapy treatment, in addition to not developing any type of cardiac condition during this period [44]. Other studies, conducted over 12 weeks in this type of vessel, have reported a 30% improvement in cardiorespiratory capacity, also measured through the 6 MWT [4]. Despite these improvements, there are no studies that verify which type of boat is more suitable when designing novel therapeutic programs based on rowing activity, since the muscle groups and exercise dynamics involved in fixed seat rowing differ from rowing on a sliding seat.
With this in mind, statistically significant improvements in cardiac function, systolic and diastolic blood pressure, and cardiorespiratory capacity can be observed when analyzing the results of our study. These improvements after implementation of the intervention protocol occur in both the FSR group and the rowers who participated in the SSR. When comparing the groups, a higher rate of improvement in resting heart rate can be seen in the FSR group, while the female breast cancer survivors who participated in the SSR group had greater improvements in the variables of heart rate before and after the 6 MWT, systolic and diastolic blood pressure, and distance traveled in the 6 MWT (directly correlated with the cardiorespiratory capacity and VO2max of the subjects). According to the data, although the rowing activity itself can promote cardiac adaptations that optimize the functioning of the cardiovascular system, with the SSR modality, greater adaptations occur comparatively considering the same time span (12 weeks).
Cardiac function adaptations were also found after a 12-week intervention when we compared the results, focusing on the variables of our study, with previous studies that used rowing training programs in breast cancer survivors [48]. The results showed a 10% improvement in the systolic and diastolic blood pressure of the participating women. These results are consistent with other rowing studies, such as those by Stefani et al. [44], which showed significant improvements in diastolic function in women breast cancer survivors treated with chemotherapy after 4 years of dragon boat training [44], or by Serra et al. [49], who found that a 16-week resistance training program improved systolic and diastolic blood pressure by 5% in breast cancer survivors. These results indicate the positive impact that a professionally supervised intervention program based on rowing could have on myocardial function, even in women previously treated with chemotherapy [44].
This is important because one of the main problems associated with oncological treatments is chemotherapy-induced cardiotoxicity, which has direct and indirect adverse effects on the cardiovascular system [9,50,51]. As an example, it has been shown that the incidence of left ventricular dysfunction among patients treated with certain anticancer drugs, such as high-dose doxorubicin (700 mg/m2), can reach 48%. The incidence of myocardial ischemia due to 5-fluorouracil (5-FU) can be as high as 10% [52,53]. Furthermore, between 26% and 93% of patients with arsenic trioxide show a prolonged QT interval, and many develop life-threatening ventricular tachyarrhythmias [54]. As a result, chemotherapy-induced cardiotoxicity has been associated with cardiovascular diseases such as myocardial dysfunction, heart failure, coronary artery disease, arrhythmias, arterial hypertension, thromboembolic disease, peripheral vascular disease, pulmonary hypertension, and pericardial complications [9,55].
In this context, clinical trials in breast cancer survivors based on pharmacological strategies (e.g., beta-blockers, angiotensin-converting enzyme inhibitors, etc.) have shown some benefits in the treatment of cardiovascular disease, but also adverse effects [8]. A rowing-based training program offers a non-pharmacological therapy that can safely contribute to achieving the goals proposed by the American College of Sports Medicine (ACSM), which recommends that cancer survivors perform at least 150 min of moderate physical activity or 75 min of vigorous exercise, as well as incorporating strength training, twice a week [56]. Reviews, such as that by Sturgeon et al. [10], suggest that aerobic exercise has a moderate effect on improving cardiac function in women with breast cancer, consistent with findings in disease-free populations. Furthermore, Gonzalo-Encabo et al. [8] after reviewing published studies, found that 16 weeks of aerobic and resistance training can reduce the risk of cardiovascular disease by 15% in Hispanic and Latina breast cancer survivors (at greater risk than the rest of the population of developing this type of disease).
Rowing is an activity that combines the benefits of aerobic exercise and strength training and can have a beneficial effect on cardiovascular health in female breast cancer survivors [48]. In this study, we can see a directly proportional relationship between cardiorespiratory capacity, heart rate, and blood pressure in female rowers who participated in both training groups. Better cardiorespiratory capacity improves the heart’s ability to maintain function and pump blood with less effort [57]. Exercise can also improve the regulation of the autonomic nervous system, reducing the activity of the sympathetic nervous system (which increases blood pressure and heart rate) and increasing that of the parasympathetic nervous system (which decreases heart rate) [9,26]. Our study showed an overall improvement of 9–10 beats less at rest after 12 weeks of training. In addition, exercise-induced improvement of endothelial function [8] may lead to improved arterial health contributing to the prevention of diseases such as hypertension. As we can see, after 24 weeks of rowing training, diastolic blood pressure decreased overall by 10%, while systolic blood pressure decreased by 15%. Moreover, these results were more prominent in the SSR group rowing on a sliding seat boat than in the FSR group, which rowed on a fixed seat boat.
In our case, we have used rowing as a novel discipline since, prior to our studies, there was no literature on this activity, which, like dragon boating, is conducted on water. Despite being a minimally injurious social sport that exercises the entire body through symmetrical movement, rowing does not have the same tradition as dragon boating [40,58]. Furthermore, our country has a strong tradition of rowing, not only at the competitive Olympic level (sculling) but also deeply rooted in coastal culture and tradition (fixed seat rowing). This is why we distinguished these two groups.
On the other hand, the risk of lymphedema following axillary surgery, such as axillary lymph node dissection, is a significant concern for breast cancer patients [59]. Engaging in physical activities, including rowing, poses potential risks and benefits. Rowing, which involves repetitive upper body movements and considerable exertion, can potentially exacerbate lymphedema due to increased fluid accumulation and stress on the lymphatic system. However, controlled and supervised physical activities have been shown to be beneficial in maintaining lymphatic function and reducing the risk of lymphedema, improving circulation and acting on the muscle as a pump during muscle contraction, which promotes venous and lymphatic drainage [7,60]. It is crucial for patients to consult with healthcare providers to develop personalized exercise programs that consider the type and extent of surgery, current physical condition, and risk factors for lymphedema. Proper technique, gradual progression, and the use of compression garments during physical activity can also help mitigate the risks associated with rowing and other upper body exercises [7,58].
Despite advances in research on the relationship between physical exercise and non-pharmacological oncological therapy, there is still insufficient scientific evidence to develop an exercise prescription for most people with this disease [10]. More research is therefore needed to understand how physical activity and sport interact with the disease, what the consequences are for the individual and what the best strategies are for oncological rehabilitation through exercise [21,24].
The strength of this pioneering study is the data it provides on physical activity and rowing, not only demonstrating that rowing is a viable and safe sport for breast cancer survivors, but also which type of boat produces the greatest positive changes in cardiac function in the participants. However, the study also has some limitations related to the sample power of the participants. Our findings are based on a relatively small sample, due to the very specific population encompassed by the study, the complexity in its recruitment and subsequent follow-up during the intervention protocol.

5. Conclusions

The present study shows that a rowing-based therapeutic program, combining aerobic and muscular strength exercises, can be a viable and safe strategy to improve cardiovascular health in female breast cancer survivors. It has been demonstrated that 24 weeks of rowing training can significantly improve cardiac function, blood pressure, and cardiorespiratory capacity, and may mitigate the adverse effects of cardiotoxicity induced by cancer treatments. These results are particularly noteworthy in the group using SSR boats, which showed greater cardiovascular adaptations compared to the group using FSR boats. This novel study highlights the importance of further exploring and validating the beneficial effects of physical exercise in cancer rehabilitation, opening the door to new non-pharmacological therapeutic strategies to improve the health and well-being of this vulnerable population.

Author Contributions

Conceptualization, J.G.-G. (Juan Gavala-González), M.R.-P. and J.C.F.-G.; methodology, J.G.-G. (Juan Gavala-González) and J.G.-G. (Juan Gamboa-González); software, M.R.-P.; validation, J.C.F.-G., J.G.-G. (Juan Gavala-González) and J.G.-G. (Juan Gamboa-González); formal analysis, M.R.-P.; investigation, M.R.-P. and J.G.-G. (Juan Gamboa-González); resources, J.G.-G. (Juan Gamboa-González) and M.R.-P.; data curation, J.G.-G. (Juan Gavala-González); writing—original draft preparation, M.R.-P. and J.G.-G. (Juan Gamboa-González); writing—review and editing, M.R.-P., J.G.-G. (Juan Gavala-González) and J.C.F.-G.; visualization, J.G.-G. (Juan Gavala-González); supervision, J.C.F.-G.; project administration, J.G.-G. (Juan Gavala-González). All authors have read and agreed to the published version of the manuscript.

Funding

This research received no external funding.

Institutional Review Board Statement

The study was conducted in accordance with the Declaration of Helsinki and approved by the Institutional Review Board (or Ethics Committee) of the University of Malaga with the number 65-2020-H.

Informed Consent Statement

Informed consent was obtained from all subjects involved in the study.

Data Availability Statement

The Ethical Committee of the University of Malaga, which authorized this study, precludes ceding, showing, or disclosing to third parties by any means the database of this research (personal data, medical history, interviews, physical condition tests, and others) because it is considered confidential and sensitive information.

Conflicts of Interest

The authors declare no conflicts of interest.

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Applsci 14 06239 g001
Figure 1. Timeline of the study. 6 MWT: 6-min walk test; AM: anthropometric measurements.
Figure 1. Timeline of the study. 6 MWT: 6-min walk test; AM: anthropometric measurements.
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Figure 2. A flow diagram of the sample selected for this study.
Figure 2. A flow diagram of the sample selected for this study.
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Figure 3. Comparison of cardiac variables before and after rowing training according to boat type. HR = heart rate; FSR = fixed seat rowing; SSR = sliding seat rowing. * p < 0.05; ** p < 0.001.
Figure 3. Comparison of cardiac variables before and after rowing training according to boat type. HR = heart rate; FSR = fixed seat rowing; SSR = sliding seat rowing. * p < 0.05; ** p < 0.001.
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Figure 4. Comparison of blood pressure before and after rowing training according to boat type. BP = blood pressure; FSR= fixed seat rowing; SSR = sliding seat rowing. ** p < 0.001.
Figure 4. Comparison of blood pressure before and after rowing training according to boat type. BP = blood pressure; FSR= fixed seat rowing; SSR = sliding seat rowing. ** p < 0.001.
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Table 1. Characteristics of the sample.
Table 1. Characteristics of the sample.
Breast (%)
Right: 37.5Left: 57.5Both: 5.0
Stage (%)
I: 7.5II: 37.5III: 40.0IV: 15.0
Surgery (%)
Breast Conserving: 50.0Total Mastectomy: 42.5Double Mastectomy: 7.5
Table 2. Descriptive analysis of study subjects according to training group.
Table 2. Descriptive analysis of study subjects according to training group.
TOTAL
(SSR + FSR)		Fixed Seat Rowing (FSR)Sliding Seat Rowing (SSR)Difference of Means (FSR-SSR)p
Age (years) (SD)56.78 (6.38)56.35 (4.89)57.2 (7.7)−0.85 (2.04)0.679
Height (cm) (SD)162.05 (5.59)161.9 (4.91)162.2 (6.33)−0.3 (1.79)0.868
Weight (kg) (SD)69.49 (9.8)72.05 (8.11)66.92 (10.85)3.22 (3.11)0.307
BMI (kg/m2) (SD)26.48 (3.58)27.48 (2.73)25.47 (4.09)1.50 (1.18)0.215
Rest HR (bpm) (SD)94.33 (11.81)96.1 (11.54)92.55 (11.51)3.55 (3.91)0.241
Initial Test HR (bpm) (SD)92.83 (12.76)94.1 (14.21)91.55 (10.58)2.55 (4.05)0.974
Final Test HR (bpm) (SD)139.5 (18.44)141,75 (18.67)137.25 (17.44)4.5 (6.32)0.888
Diastolic BP (mmHg) (SD)160.03 (13.37)158.25 (12.8)161.8 (13.35)−3.55 (4.69)0.405
Systolic BP (mmHg) (SD)100.78 (10.19)100.55 (10.51)101 (9.59)−0.45 (3.9)0.856
6 MWT (m) (SD)784.78 (103.64)817.25 (51.1)752.3 (127.37)64.95 (44.43)0.077
Table 3. Within-subject analysis of the study variables after the intervention program.
Table 3. Within-subject analysis of the study variables after the intervention program.
Pre-Test (SD)Post-Test (SD)Δpre-post (SD)Student’s tEffect Sizep
Rest HR (bpm)94.33 (11.81)84.78 (11.27)−9.55 (7.29)8.2751.1540.000 **
Initial Test HR (bpm)92.83 (12.76)81.85/11.35)−10.97 (7.59)9.1451.20.000 **
Final Test HR (bpm)139.5 (18.44)122.4 (19.17)−17.1 (15.69)6.8912.4810.000 **
Diastolic BP (mmHg)160.03 (13.37)144.23 (18.6)−15.8 (16.36)6.1092.5870.000 **
Systolic BP (mmHg)100.78 (10.19)85.8 (9.8)−14.97 (10.86)8.7161.7180.000 **
6 MWT (m)784.78 (103.64)863.13 (108.75)+78.35 (62.57)−7.929.8930.000 **
Bpm = beats per minute; mmHg = millimetres of mercury; SD = standard deviation; MS = mean square. ** p < 0.001.
Table 4. Within-subject analysis of the study variables according to boat type.
Table 4. Within-subject analysis of the study variables according to boat type.
Fixed Seat Rowing (FSR)Sliding Seat Rowing (SSR)Interaction Effect Boat Measurement
Pre-Test (SD)Post-Test (SD)Δpre-postPre-Test (SD)Post-Test (SD)Δpre-postMSFp
Rest HR (bpm)96.1 (11.54)85.45 (11.28)−10.6592.55 (11.51)84.1 (10.93)−8.45126.050.90.000 **
Initial test HR (bpm)94.1 (14.21)83.4 (12.86)−10.791.55 (10.58)80.3 (8.99)−11.2565.020.390.000 **
Final test HR (bpm)141,75 (18.67)127.9 (22.38)−13.85137.25 (17.44)116.9 (12.47)−20.35202.50.590.000 **
Diastolic BP (mmHg)158.25 (12.8)145.9 (17.32)−12.35161.8 (13.35)142.55 (19.2)−19.25126.050.70.000 **
Systolic BP (mmHg)100.55 (10.51)87.55 (8.11)−13101 (9.59)84.05 (10.73)−16.952.020.020.000 **
6 MWT (m)817.25 (51.1)880.3 (69.96)+63.05752.3 (127.37)845.95 (132.58)+93.6542,185.024.250.000 **
Interaction Effect Boat Measurement refers to the influence of the type of boat used according to the training group on the variables. Bpm = beats per minute; mmHg = millimetres of mercury; 6 MWT = 6-min walk test; SD = standard deviation; MS = mean square. ** p < 0.001.
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Gavala-González, J.; Real-Pérez, M.; Gamboa-González, J.; Fernández-García, J.C. Effects of Rowing on Cardiac Function in Breast Cancer Survivors: Sliding Seat Rowing vs. Fixed Seat Rowing. Appl. Sci. 2024, 14, 6239. https://doi.org/10.3390/app14146239

AMA Style

Gavala-González J, Real-Pérez M, Gamboa-González J, Fernández-García JC. Effects of Rowing on Cardiac Function in Breast Cancer Survivors: Sliding Seat Rowing vs. Fixed Seat Rowing. Applied Sciences. 2024; 14(14):6239. https://doi.org/10.3390/app14146239

Chicago/Turabian Style

Gavala-González, Juan, Mateo Real-Pérez, Juan Gamboa-González, and José Carlos Fernández-García. 2024. "Effects of Rowing on Cardiac Function in Breast Cancer Survivors: Sliding Seat Rowing vs. Fixed Seat Rowing" Applied Sciences 14, no. 14: 6239. https://doi.org/10.3390/app14146239

APA Style

Gavala-González, J., Real-Pérez, M., Gamboa-González, J., & Fernández-García, J. C. (2024). Effects of Rowing on Cardiac Function in Breast Cancer Survivors: Sliding Seat Rowing vs. Fixed Seat Rowing. Applied Sciences, 14(14), 6239. https://doi.org/10.3390/app14146239

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