Abstract
This study investigated the maximal isokinetic muscle power characteristics in adolescent boys and adult men by comparing voluntary maximal efforts on a novel isokinetic cycling ergometer. Thirteen boys and 12 men performed between seven and ten 6-s (unpaced, maximal) sprints at crank velocities ranging from 80–170 rev · min−1 (8.3–17.8 rad · s−1). Maximum power over a single revolution (Pmax) and mean power for the total of complete revolutions in 5 s (MP5s) were recorded, and the optimal crank velocity for both parameters was calculated for each subject. Men’s Pmax were significantly higher (P < .05) than boys. There were no significant differences in the optimal velocity at Pmax and MP5s or the theoretical maximum velocity at Pmax and MP5s for men or boys. All subjects showed a linear torque velocity relationship (r > 0.90) for both Pmax and MP5s. Absolute differences in isokinetic power between adolescent boys and adult men cannot be attributable to the differences in crank pedal velocities as optimal velocities were similar in both groups.
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