Effectiveness of an Individualized Training Based on Force-Velocity Profiling during Jumping

Area of Science:

• Sports Science
• Biomechanics
• Exercise Physiology

Background:

• Ballistic performance relies on maximal lower limb power output and the force-velocity (F-v) mechanical profile.
• Force-velocity (FV) imbalance, the difference between an athlete's actual and optimal F-v profile, is a key factor.
• Optimized training should aim to increase power output and/or reduce FV imbalance.

Purpose of the Study:

• To investigate if an individualized training program based on the F-v profile decreases FV imbalance.
• To determine if this individualized training improves vertical jump performance.

Main Methods:

• Eighty-four subjects were assigned to an "optimized" group (sub-divided by FV profile: velocity-deficit, force-deficit, well-balanced), a "non-optimized" group, or a control group.
• The "optimized" group received individualized training programs designed to reduce their specific FV imbalance.
• The "non-optimized" group followed a standard resistance training program for 9 weeks.

Main Results:

• All three sub-groups within the "optimized" training group showed significant increases in jumping performance (12.7-14.2% improvement).
• Jump height improvements were associated with marked reductions in FV imbalance for force-deficit and velocity-deficit groups.
• The "non-optimized" group exhibited more variable and unclear results in jump performance and FV changes.

Conclusions:

• Individualized training programs targeting FV imbalance are more effective for improving jumping performance than traditional, non-individualized programs.
• Reducing FV imbalance can lead to significant improvements in ballistic performance, even without concurrent increases in maximal power output.
• FV imbalance is a valuable metric for prescribing optimal resistance training to enhance athletic ballistic performance.