In some people, getting stronger in a specific knee position was linked to slightly better balance in forward and diagonal reaches, but this connection was not consistent across all directions or legs.
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Whether quadriceps strength gains consistently mediate improvements in dynamic balance across interventions and populations.
A systematic review and meta-analysis of all RCTs measuring both quadriceps strength (isometric at 70°) and dynamic balance (Y-Balance Test) before and after interventions, using mediation analysis to determine if strength changes explain balance improvements.
Whether increasing quadriceps strength directly causes improvements in dynamic balance, independent of other factors.
A double-blind RCT with 150 healthy adults aged 20–30, randomized to stretching (to increase strength), resistance training (to increase strength), or placebo, with Y-Balance Test performance measured pre- and post-intervention; mediation analysis will test whether strength change predicts balance change.
Whether individuals who gain quadriceps strength over time also improve in dynamic balance, controlling for other variables.
A prospective cohort study following 500 adults aged 18–35 for 12 months, measuring quadriceps strength and Y-Balance Test performance quarterly, using multivariate models to test whether strength change predicts balance change after adjusting for flexibility, neuromuscular control, and activity.
Whether people with higher quadriceps strength have better dynamic balance at a single point in time.
A cross-sectional analysis of 1000 adults aged 20–40, comparing Y-Balance Test performance between quartiles of quadriceps isometric strength (measured at 70°), matched for age, sex, and physical activity.
Whether dramatic increases in quadriceps strength are linked to dramatic balance improvements in individuals.
A case series of 10 individuals undergoing a 6-month intervention causing ≥20% increase in quadriceps strength at 70°, with weekly tracking of Y-Balance Test performance and detailed logs of all physical activities.