All-out intermittent exercise on a one-leg knee extension ergometer: mechanical and physiological responses to different resistance forces
研究了在单腿膝关节伸展测力计上，不同阻力下进行全力高强度间歇训练时的力学和生理反应，发现160%最大功率阻力最适合保持动作一致性。
This study aimed to evaluate mechanical and physiological responses to all-out high-intensity interval training (HIIT) sessions (10 maximal efforts of 30 seconds each with 4 min of rest) performed against different resistance forces on a one-leg knee extension ergometer. Eighteen men conducted an incremental test to determine the resistance associated with its maximal power (Rmax), followed by all-out HIIT sessions at 120%, 160%, and 200% of Rmax, while oxygen consumption and neuromuscular function were measured. Mechanical power output was higher during the session at 200% of Rmax compared to the other sessions (p < 0.001), but its absolute anaerobic energy contribution was similar to that at 160% of Rmax. Notably, the all-out efforts at 200% Rmax led to inconsistent kicking cadence and some participants were unable to complete the session. Therefore, 160% Rmax was the highest suitable resistance force for a consistent all-out HIIT session on a knee extension ergometer.