Force-Velocity Profile

The optimal FVP depends on the sport. Samozino (2012) proposed that maximal power is achieved when F0 and v_max are proportioned such that peak power occurs at ~30% of F0 and ~30% of v_max. However, sport-specific analysis shows variation: sprinters often benefit from higher velocity dominance; weightlifters from force dominance. The 'optimal' profile is task-specific. In general, balanced profiles (neither extremely force- nor velocity-dominant) produce higher absolute power.

Training interventions systematically shift FVP. Heavy resistance training (90-100% 1RM) increases F0, shifting the profile upward and to the left. Light-load, high-velocity training increases v_max, shifting the profile upward and to the right. Plyometric and explosive training increases overall power output (shift upward). Periodization alternates these stimuli to optimize the entire profile. Typical shifts of 5-10% in F0 or v_max are achievable in 4-6 weeks with focused training.

A force-dominant athlete has high F0 but low v_max relative to their power potential. Their FVP curve is steep, leaving room for improvement on the velocity side. Velocity training increases v_max without losing F0, shifting the profile rightward and upward, increasing maximal power. Conversely, adding more force (strength training) to a force-dominant profile yields smaller power gains because the limiting factor is already high-force, low-velocity mechanics.

Rough estimation is possible using video analysis and power equations (e.g., from jump height), but true FVP quantification requires direct force measurement via force plates. Portable force plates and smartphone-based motion capture are emerging tools, though accuracy varies. For practical coaching, subjective assessment (heavy vs. light loads) combined with running and jumping tests can guide training focus without formal FVP measurement.

FVP correlates with performance in explosive-movement sports (sprinting, jumping, throwing) but is not deterministic. Two athletes with identical FVP may perform differently due to variations in skill, technique, decision-making, and psychological factors. FVP is one piece of the performance puzzle. Use FVP alongside sport-specific tests, video analysis, and competition results for comprehensive assessment.