Influence of Isoinertial-Pneumatic Mixed Resistances on Force-Velocity Relationship

摘要: Purpose: Muscle strengthening is commonly based on the use of isoinertial loading, whereas variable resistances such as pneumatic loading may be implemented to optimize training stimulus. The purpose current study was determine effect ratio between and resistance force–velocity relationship during ballistic movements. Methods: A total 15 participants performed 2 concentric repetitions bench-press movements with intention throw bar at 30%, 45%, 60%, 75%, 90% maximal repetition 5 ratios including 100%, 50%, 25%, or 0% resistance, additional load being isoinertial. Force-, velocity-, power-time patterns were assessed averaged over phase power–velocity relationships for each ratio. Results: Each 25% increase in part elicited higher movement velocity (+0.11 ± 0.03 m/s from 80% phase) associated lower force levels (–43.6 15.2 N). Increased resulted toward end (+0.23 0.01 100%). Conclusions: findings show that could modulated develop acceleration (pneumatic-oriented resistance). Inversely, isoinertial-oriented should used power. Resistance modality could, therefore, considered an innovative modulate stimulus according athletic purposes.