1. Introduction
Mental health problems are a prevalent issue among elite athletes, with up to 57 percent experiencing symptoms of anxiety or depression [
1,
2]. The repercussions of mental health problems in elite athletes are far-reaching, impacting various aspects of their lives, from decreased performance outcomes [
3] to risk of suicide [
4,
5]. For young elite athletes, the problem may be even more pronounced, as research shows psychiatric disorders are more prevalent among elite athletes under 18 compared with older groups [
6]. Stigma around seeking help is an additional barrier for young athletes [
7], potentially delaying early intervention and reducing treatment engagement. This is especially concerning since adolescence is a critical period for the onset of many psychiatric disorders [
8]. Given the unique pressures faced by this group [
9], there is a pressing need for successful coping mechanisms. Emotion regulation, although less studied in young elite athletes, is one such strategy that may help buffer against the negative impact of these demands.
1.1. Emotion Regulation and Mental Health
Emotion regulation refers to the effort to influence what emotion we are feeling, when we feel it, and how the emotion is experienced and expressed [
10]. The Emotion Regulation Questionnaire (ERQ) is widely used to assess two core strategies: cognitive reappraisal (CR), which involves reframing a situation to alter its emotional impact, and expressive suppression (ES), which entails inhibiting outward emotional expressions. CR is generally considered adaptive and associated with psychological well-being, while ES is viewed as maladaptive and linked to poorer mental health outcomes. Previous research confirms that greater use of CR has been associated with better mental health, whereas higher ES is associated with increased distress and reduced well-being in both general and athletic populations [
11,
12]. However, to the best of our knowledge, there is no previous research on these associations in young elite athletes participating in upper secondary education.
1.2. Changes in Emotion Regulation Strategies
Findings on developmental trajectories of emotion regulation strategies in adolescents are mixed. Some studies report a decline in maladaptive strategies such as suppression before age 16 [
13,
14], while others observe increases [
15,
16] or stability [
13,
17] in both CR and ES throughout adolescence [
17,
18]. These inconsistencies suggest that environmental factors—such as increased academic and athletic demands—may drive shifts in emotion regulation during this transition, rather than maturation alone. Notably, the first year of upper secondary education is marked by heightened stress and transition demands for young elite athletes [
19], underscoring the importance of understanding how emotion regulation strategies evolve and impact mental health during this critical period.
1.3. The Role of the Coach and the Peers for Emotion Regulation Strategies
The interpersonal environment created by coaches and peers may play a significant role in shaping emotion regulation strategies among young elite athletes. Coaches influence athletes through their interpersonal style, which can either support or undermine basic psychological needs such as autonomy, structure, and involvement [
20,
21]. In the context of emotion regulation, previous research has indicated that the perceived support of these basic psychological needs is related to emotion regulation in athletes [
22]. This means that need-supportive coaching styles, characterized by encouragement, clear communication, and respect, are likely linked to more adaptive emotion regulation, while controlling or critical approaches may promote maladaptive strategies like ES.
Peers also influence each other meaningfully by establishing the motivational climate within teams. A task-involving peer climate, where effort, cooperation, and personal improvement are valued, is associated with positive emotional and motivational outcomes. In contrast, an ego-involving climate—focused on outperforming others and penalizing mistakes [
23,
24]—can undermine motivation and well-being [
25,
26]. Given the strong influence of peer relationships during adolescence [
27], understanding and fostering supportive peer climates is likely crucial for supporting adaptive emotion regulation and overall mental health in young elite athletes.
1.4. Study Aims and Hypotheses
The data for this study stems from the Dragon project, a longitudinal study of young elite athletes attending upper secondary education in Sweden. The aim of the present study was to examine within-individual changes in emotion regulation strategies and their association with mental health in young elite athletes over a 12-month period, while also considering the influence of coach interpersonal style and peer motivational climate.
Based on the literature, we formulated three hypotheses:
H1. ES will be related to worse mental health, while CR will be related to better mental health.
H2. Overall use of emotion regulation strategies will increase during this 12-month period.
H3. A need-supportive coach interpersonal style and task-involving peer motivational climate will be related to less ES and more CR, and a controlling coach interpersonal style and ego-involving peer motivational climate will be related to more ES and less CR.
4. Discussion
In line with the first hypothesis, more use of ES was related to worse mental health in young elite athletes, with an effect size (
β = 0.34) that could be considered large according to Gignac and Szodorai [
31]. This effect size suggests not only statistical significance but also practical significance, as it indicates that athletes relying heavily on ES experience meaningfully higher levels of mental health problems. This harmonizes with findings showing that habitual ES use is linked not only to acute distress but also to sustained mental health concerns over time in both college-aged athletes [
12] and the general population [
11]. The present study expands on those findings by showing that this relationship also exists within individuals, meaning that when someone uses more ES, they tend to experience worse mental health. This harmonizes with a meta-analysis of daily diary and experience sampling studies that found that ES was related to increased negative affect [
52]. In addition, our findings demonstrate that this relationship also applies to habitual ES use over longer periods of time. Gross and John [
31] suggest that ES is related to diminished ability to mood repair, meaning that the young elite athletes who rely on ES might be unable to mitigate the impact of increasing demands on their mental health. To summarize, when young elite athletes are making efforts to suppress their emotions, they are also experiencing worse mental health.
Also in line with the first hypothesis and previous research [
11,
12], more use of CR was related to better mental health in young elite athletes, with a large effect size [
31]. Gross and John [
32] suggest that the use of CR gives the opportunity to reinterpret stressful events with an optimistic attitude, and in that way, the young elite athletes might cope with increased demands in ways that are associated with better mental health. Potential interventions worth exploring in future studies that target CR could include cognitive-behavioral techniques training for coaches, reframing exercises, and perspective-taking training programs that help athletes reinterpret competitive stressors.
In line with the second hypothesis, the young elite athletes slightly increased their use of emotion regulation strategies during the twelve-month study period. This increase was regarding both ES and CR, meaning that they increased their use of both adaptive and maladaptive emotion regulation strategies. Given that previous research had not established clear trajectories for emotion regulation strategies during adolescence [
13,
14,
15,
16,
17,
18], these changes are likely to be influenced by environmental factors, rather than age. This increase in emotion regulation strategies could be explained by the young elite athletes aiming to cope with the increased demands during upper secondary sport education reported by Stambulova et al. [
19]. These findings highlight the potential importance of the beginning of upper secondary education as a time period for promoting more adaptive emotion regulation strategies, such as CR.
For the third hypothesis, the study found mixed support. Both coach interpersonal style and the peer motivational climate were related to the emotion regulation strategies of the young elite athletes, although in different ways. Both the need-supportive coach interpersonal style and the controlling coach interpersonal style were related to increased use of CR, meaning that when coaches promote autonomy and structure and are involved in the well-being of the athlete, as well as when the coach takes a clear leading role and is punishing in cases of sport-related failures, the young elite athletes are more likely to reinterpret situations to regulate their emotions. This positive effect of the need-supportive coach interpersonal style is in accordance with, while the positive effect of the controlling coach interpersonal style is contrary to, previous research on basic psychological need satisfaction [
22]. This seemingly paradoxical finding may be explained by the fact that both coaching styles present cognitive challenges that require reappraisal. Need-supportive coaching may encourage athletes to reframe challenges as growth opportunities, while controlling coaching may necessitate reappraisal as a coping mechanism to manage the stress of demanding expectations. The controlling coach interpersonal style was also related to increased use of ES, which is somewhat in contrast to Robazza et al., where the relationship between the sense of autonomy and ES was nonsignificant. However, Robazza et al. did not study controlling coach interpersonal style directly [
22], which may explain the difference. This dual effect may arise from a heightened need for emotion regulation in response to a coach’s controlling interpersonal style, perhaps due to the young elite athlete being hesitant to express their initial emotion when unsure of the coach’s response.
Furthermore, a task-involving peer motivational climate was related to more use of CR, meaning that when peers promote mastery and individual improvement, the young elite athletes are more inclined to use CR. This harmonizes with previous research on the role of peer motivational climate on emotion regulation strategies [
53] as well as the research on coach motivational climate [
54]. However, contrary to previous research regarding coach motivational climate [
54], in our study, which focuses on peer motivational climate, ego-involving motivational climate was unrelated to both CR and ES, and task-involving motivational climate was unrelated to ES. This could stem from the different impact that the coach and the peers might have on the young elite athletes [
55,
56].
4.1. Limitations and Further Directions
This study had a few limitations. First, all participants were students at the same school, limiting the generalizability of the results to other sports schools in Sweden and other countries. The participants were, however, heterogeneous in terms of sport types and gender distribution, suggesting that the school should be similar to other sports schools. Further research should replicate these findings using multiple schools to establish generalizability. Second, given the observational design, causality cannot be inferred. Future randomized controlled trials are needed to determine whether interventions targeting emotion regulation strategies can causally improve mental health in young elite athletes. A third limitation is the use of self-report measures of the behaviors of the coach and the peers. The perception of the behaviors of others may be influenced by the emotion regulation strategies of the athlete (e.g., an athlete using more CR might interpret the coach interpersonal style as more favorable). Future studies could address potential perception biases through triangulation methods, including coach self-reports, peer ratings, and objective behavioral observations to validate athlete perceptions. Fourth, even though both team and individual sports were represented in the study, the sample is somewhat skewed towards team sports (n = 78 for team sports, n = 14 for individual sports), limiting the generalizability of the results for athletes in individual sports. Fifth, regarding emotion regulation strategies, mental health, and coach interpersonal style, it was possible to study within-individual relationships. However, regarding peer motivational climate, it was only possible to study between-individual relationships since data from the third time point were lacking. Future studies should concurrently measure peer motivational climate, emotion regulation strategies, and mental health over time to establish within-individual relationships. Regarding reliability, ES did show poor internal consistency during T1. This was deemed to be caused by a single item. Reanalysis with this item removed was conducted and did not impact any relationships significantly, except for the increased use of ES during the study period, where the reanalysis still showed an increase, but the effect size was halved. This means that the finding of increased use of ES during the beginning of the young elite athletes’ upper secondary education should be interpreted with caution and would need replication to be properly established. Moreover, including multiple independent variables in the same model can cause problems regarding standard errors and p-values if these independent variables are too closely correlated to each other. However, in the present study, there was no correlation stronger than r = 0.70 between independent variables, and therefore, multicollinearity was not deemed to be a major issue.
4.2. Implications
The finding that both ES and CR were associated with mental health in young elite athletes suggests that facilitating CR over ES could be explored in future research as a possible strategy for supporting mental health in this population. Previous studies have demonstrated the malleability of emotion regulation strategies. In a randomized controlled trial, Samadi et al. showed an effect of a mindfulness-based intervention on both CR and ES in young athletes [
57], and since use of ES and CR has been linked to a plethora of other outcomes in athletes, such as performance [
58] and physical recovery [
59], such interventions could be beneficial for athletes in multiple ways. Josefsson et al. also found a reduction in emotional dysregulation in athletes after a mindfulness-based intervention [
60]. Moreover, the finding about the role of coach interpersonal style and peer motivational climate in the use of emotion regulation strategies could inform coaches and peers on how to act in ways that are associated with more adaptive emotion regulation strategies among athletes. For example, when a young elite athlete is lacking adaptive emotion regulation strategies, coaches should listen to the athlete’s ideas and give clear feedback, and the peers should be supportive when the athlete is trying their hardest. Since the first half of upper secondary education was found to be a period when the athletes increase the overall use of emotion regulation strategies, this is a favorable time for coaches and peers to facilitate the use of more effective forms of emotion regulation strategies. Further research could try to implement programs aiming to increase need-supportive coach interpersonal style and task-involving peer motivational climate to study the impact on emotion regulation strategies. See
Table 6 for practical recommendations.
5. Conclusions
In young elite athletes, habitual use of CR was related to better mental health, while habitual use of ES was related to worse mental health. This was in line with the first hypothesis of the study, as well as previous studies, thereby contributing to existing literature by establishing this relationship in young elite athletes. Over the 12-month study period, the athletes demonstrated a slight increase in both ES and CR usage, indicating some dynamic shifts in their emotion regulation practices. This was somewhat in line with our second hypothesis that suggested that use of emotion regulation strategies would increase overall, but that it was unclear whether it would mainly be in the form of ES or CR. Furthermore, both coach interpersonal style and peer motivational climate were found to relate to the emotion regulation strategies employed by young elite athletes, although not completely in the hypothesized direction.
Overall, these findings highlight the potential for future randomized controlled trials where emotion regulation is modified in young elite athletes and their mental health is followed. Perhaps such interventions could be aimed at influencing coach behaviors or the culture between the peers to establish causality for those relationships as well. These studies should investigate the effectiveness and feasibility of such interventions.
In summary, this study provides the first longitudinal evidence that young elite athletes increasingly rely on both adaptive and maladaptive emotion regulation strategies over time, with ES being related to worse mental health and CR being related to better mental health. These findings could help to identify young elite athletes who are struggling with mental health issues.