Based on Barbell 1RM: An Exploration of Load in Flywheel Resistance Training

Abstract Objective This study aims to determine the optimal load for developing different abilities in flywheel resistance training (FRT) based on velocity indicators derived from the barbell one repetition maximum (1RM). The study seeks to establish the fitting relationship with flywheel load and derive the corresponding regression equation. Force-velocity profiles of the flywheel will also be used to propose load prescriptions in FRT. Methods 39 participants underwent four tests, including a 1RM test to determine weights at different percentages (20%, 40%, 60%, 80%, 90% 1RM). Gymaware measured concentric velocities at different percentages of the 1RM. Inertial loads in FRT were explored based on the velocities. Reliability was assessed through velocity retesting. Linear and multiple linear regression were used for fitting relationships. Results A strong negative correlation (r = -0.88) between moment of inertia and velocity was observed (R2 = 0.78). The multiple regression model showed a high level of fit (R2 = 0.81) and a very strong correlation (r = 0.90). The regression equation is y = 0.769–0.846v + 0.002kg. Conclusions A multiple linear regression equation can determine personalized inertia load for FRT. FRT fosters chronic adaptations and acute capabilities but may not develop speed strength. Strength speed should be developed in the 40%-60% 1RM range, power in the 60%-80% 1RM range, and absolute strength in the 80%-100% 1RM range or beyond.