The Effect of Verbal Encouragement on Performance and Muscle Fatigue in Swimming
Abstract
:1. Introduction
2. Methods
2.1. Recruitment of Participants
2.2. Characteristics of the Sample
2.3. Anthropometric Measurements
2.4. Experimental Design
2.5. Swim Trial
2.6. Kinematic Assessment
2.7. sEMG Assessment
3. Statistical Analysis
4. Results
4.1. Impact of VE on Performance
4.2. Impact of VE on Fatigue
5. Discussion
5.1. General Results
5.2. Performance and Muscle Fatigue
5.3. Limitations and Strengths
6. Conclusions and Practical Applications
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameter | Value |
---|---|
Sex (number, percentage) | |
Male | 28 (47%) |
Female | 32 (53%) |
Age (mean, standard deviation (median)) | 18.63 ± 3.46 (18) years |
Height (mean, standard deviation) | 175.17 ± 7.90 cm |
Body mass (mean, standard deviation) | 65.23 ± 10.11 kg |
Body fat (mean, standard deviation) | 11.45 ± 1.84% |
Personal best (mean, standard deviation) | 134.26 ± 19.22 s |
IPS (mean, standard deviation (median)) | 715.87 ± 163.71 (746) points |
Experience (mean, standard deviation (median)) | 7.03 ± 3.90 (6) years |
Distance | Without VE | With VE | Statistics (p-Value) | Mean Difference ± SE [95% CI] | ES [95% CI] | Interpretation [Direction (Magnitude)] |
---|---|---|---|---|---|---|
0–200 m | 1.47 ± 0.17 m/s | 1.48 ± 0.17 m/s | −7.33 (<0.001) | −0.011 ± 0.002 (−0.014 to −0.008) | −0.95 (−1.25 to −0.64) | ↑ (large ES) |
0–100 m | 1.50 ± 0.17 m/s | 1.53 ± 0.15 m/s | −8.60 (<0.001) | −0.033 ± 0.004 (−0.041 to −0.025) | −1.11 (−1.43 to −0.78) | ↑ (large ES) |
100–200 m | 1.44 ± 0.17 m/s | 1.43 ± 0.18 m/s | 4.89 (<0.001) | 0.008 ± 0.002 (0.004 to 0.011) | 0.63 (0.35 to 0.91) | ↓ (medium ES) |
Predictor | Estimate | SE [95% CI] | Statistics (p-Value) | Standardized Estimate [95% CI] |
---|---|---|---|---|
Intercept | −0.036 | 0.011 (−0.057 to −0.014) | −3.26 (0.002) | - |
Sex (female vs. male) | −0.003 | 0.002 (−0.008 to 0.001) | −1.68 (0.099) | −0.30 (−0.66 to 0.06) |
Age | 0.000 | 0.001 (−0.001 to 0.001) | 0.46 (0.647) | 0.07 (−0.24 to 0.38) |
IPS | 0.000 | 0.000 (0.000 to 0.000) | 1.62 (0.112) | 0.22 (−0.05 to 0.49) |
Years of experience | 0.002 | 0.001 (0.000 to 0.003) | 2.64 (0.011) | 0.52 (0.12 to 0.91) |
R = 0.74, R2 = 0.55, aR2 = 0.52, AIC = −403, BIC = −391, RMSE = 0.008, F(4,55) = 16.9, p < 0.001 |
Muscle | Distance (m) | Without VE (%) | With VE (%) | Mean Difference (%) | Statistics (p-Value) | ES (Magnitude) |
---|---|---|---|---|---|---|
RF | 0–200 | −6.40 ± 4.00 | −10.28 ± 3.14% | 4.03 ± 0.51 | 1656 (<0.001) | 0.87 (large) |
0–100 | −3.78 ± 2.35 | −3.62 ± 2.12 | 0.04 ± 0.13 | 811 (0.446) | 0.11 (null/negligible) | |
100–200 | −8.45 ± 4.47 | −11.42 ± 3.28 | 3.07 ± 0.39 | 1622 (<0.001) | 0.83 (large) | |
TB | 0–200 | −10.77 ± 5.48 | −15.35 ± 4.68 | 4.23 ± 0.63 | 1751 (<0.001) | 0.91 (large) |
0–100 | −10.03 ± 6.19 | −10.55 ± 4.94 | 0.07 ± 0.42 | 789 (0.609) | 0.08 (null/negligible) | |
100–200 | −14.14 ± 6.32 | −19.88 ± 6.00 | 5.08 ± 0.85 | 1720 (<0.001) | 0.88 (large) | |
LD | 0–200 | −10.58 ± 3.81 | −15.00 ± 5.88 | 4.46 ± 0.56 | 1639 (<0.001) | 0.85 (large) |
0–100 | −9.37 ± 4.54 | −9.81 ± 3.89 | 0.20 ± 0.27 | 1147 (0.048) | 0.30 (small) | |
100–200 | −14.88 ± 4.31 | −19.34 ± 6.30 | 4.39 ± 0.53 | 1673 (<0.001) | 0.83 (large) | |
PM | 0–200 | −9.62 ± −4.75 | −13.31 ± 2.89 | 3.63 ± 0.48 | 1713 (<0.001) | 0.87 (large) |
0–100 | −5.62 ± 1.76 | −5.37 ± 1.66 | 0.22 ± 0.15 | 663 (0.064) | 0.28 (small) | |
100–200 | −14.11 ± 3.55 | −18.73 ± 2.27 | 4.71 ± 0.45 | 1765 (<0.001) | 0.93 (large) |
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Puce, L.; Trompetto, C.; Currà, A.; Marinelli, L.; Mori, L.; Panascì, M.; Cotellessa, F.; Biz, C.; Bragazzi, N.L.; Ruggieri, P. The Effect of Verbal Encouragement on Performance and Muscle Fatigue in Swimming. Medicina 2022, 58, 1709. https://doi.org/10.3390/medicina58121709
Puce L, Trompetto C, Currà A, Marinelli L, Mori L, Panascì M, Cotellessa F, Biz C, Bragazzi NL, Ruggieri P. The Effect of Verbal Encouragement on Performance and Muscle Fatigue in Swimming. Medicina. 2022; 58(12):1709. https://doi.org/10.3390/medicina58121709
Chicago/Turabian StylePuce, Luca, Carlo Trompetto, Antonio Currà, Lucio Marinelli, Laura Mori, Marco Panascì, Filippo Cotellessa, Carlo Biz, Nicola Luigi Bragazzi, and Pietro Ruggieri. 2022. "The Effect of Verbal Encouragement on Performance and Muscle Fatigue in Swimming" Medicina 58, no. 12: 1709. https://doi.org/10.3390/medicina58121709