ArticleFrontiers in physiology2026
The effect of an 8-week Life Kinetics exercise program on salivary cortisol, alpha-amylase, and ımmunoglobulin-A in U14 female cross-country skiers.
Article in Frontiers in physiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: The aim of this study is to investigate the effects of an 8-week Life Kinetics exercise program on salivary biomarkers (α-amylase, cortisol, and immunoglobulin-A) in U14 female cross-country skiers. Methods: A total of 20 female cross-country skiers volunteered to participate in this study. The study was designed as a pre-/post-test controlled experimental study, and adolescent individuals were randomly assigned to either the cross-country skiing (control; Results: No significant group, time, or group × time interaction effects were observed for salivary cortisol levels ( Conclusion: The present findings indicate that the 8-week Life Kinetics intervention did not produce significant changes in salivary cortisol levels, suggesting no evidence of altered chronic stress regulation in adolescent female skiers. Although a significant group × time interaction was observed for sIgA, the overall findings should be interpreted cautiously. Taken together, the results suggest that Life Kinetics training was well tolerated from a physiological stress perspective, while further studies with larger sample sizes, longer intervention periods, and repeated biomarker assessments are needed to better clarify its effects on stress- and immune-related responses.
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