Figure 2.

Performance changes during the experimental period. VO_2max, maximal oxygen consumption; vVO_2max, velocity at maximal oxygen consumption; vTh, ventilatory threshold; TAD, trained adolescents; TA, trained adults; UAD, untrained adolescents; UA, untrained adults; ¹a significant difference with baseline (P < 0.05); ²a significant difference between midseason and end-season (P < 0.05); ³a significant difference between adolescent groups at the corresponding time point (P < 0.05); ⁴a significant difference between adult groups at the corresponding time point (P < 0.05); ⁵a significant difference between trained groups at the corresponding time point (P < 0.05); ⁶a statistical difference between control groups at the corresponding time point (P < 0.05).