Maximal Leg Strength Prediction Tool
Free evidence-based resource — McClean et al., 2025
Free evidence-based resource — McClean et al., 2025
This tool predicts single-leg, multijoint eccentric, isometric, and concentric leg press strength from a velocity-load jump assessment using a force plate. Inputs are derived from countermovement jump (CMJ) testing across three load conditions and compared against normative data from university athletes.
Predictions are based on regression models validated in collegiate athletes (McClean et al., 2024). The only technical resource required is a force plate system.
Enter all load and take-off velocity (TOV) values from the force plate assessment.
The velocity-load profile and all three strength predictions will appear here after you click Predict Strength below.
Enter load and TOV values on the left to display the athlete's velocity-load profile.
Take-off velocity is measured across three CMJ load conditions (BW, BW+30%, BW+60%). A linear regression models the force-velocity relationship, extrapolating the load intercept (L₀): A proxy for maximal isometric strength.
Concentric and eccentric deceleration impulse from the BW+60% CMJ trial, along with maximal downward velocity, capture force production capacity during key movement phases linked to multijoint strength.
Sex-specific ML models trained on collegiate athletes predict single-leg, multijoint eccentric (~14% error), isometric (~14% error), and concentric (~10% error) leg press strength.