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Variation of training load and performance during a preparation mesocycle of young swimmers (Bachelor thesis)

Ζωάνος, Ιωάννης/ Zoanos, Ioannis

The present study investigated the relationship between training load, recovery, and performance during a five-week preparation mesocycle in adolescent swimmers. Eleven athletes (9 boys, 2 girls) were monitored daily for perceived exertion (RPE, sRPE). Internal load was calculated per session using the sRPE method, and weekly load indices were derived. Performance was assessed pre- and post-mesocycle via time and speed trials. Analyses included pre–post comparisons and weekly correlations between changes in speed and load indices. A statistically significant improvement in performance (in both time and speed) was observed after the mesocycle (p<0.05). RPE fluctuated, peaking in the third week, reflecting the planned periodization. Weekly correlations between speed changes and load indices were generally weak and non-significant, except for the fourth week, where a significant negative correlation was found. Aggregated correlations across all weeks were non-significant. Subjective monitoring captured meaningful within-cycle dynamics (RPE peak, inverse RPE–TQR pattern), while the load–performance relationship appeared temporally asymmetrical and nonlinear. The use of accessible tools such as RPE, TQR, and sleep/wellness indices offers valuable feedback to coaches for balancing training load and recovery, enhancing early detection of fatigue, and supporting timely adjustments to training plans.