The Claim
Male collegiate sprinters who perform a 400 m sprint at 96.8% of their personal best time exhibit a 14.0% increase in the ratio of eccentric to concentric duration (ED:CD) during countermovement jumps, and this change persists for at least 24 hours, indicating a sustained shift in neuromuscular movement strategy characterized by relatively shorter concentric phases compared to eccentric loading phases.
What the research says
Not yet evaluated
We are still looking at what the research says.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
After a really hard sprint, college male runners seem to jump differently for over a day — their muscles spend more time stretching and less time shortening, which might be their body’s way of adjusting after intense effort.
See the scientific wording
Following a 400 m sprint at 96.8% of personal best time, male collegiate sprinters exhibit a 14.0% increase in the ratio of eccentric to concentric duration (ED:CD) during countermovement jumps that persists for at least 24 hours, suggesting a lasting alteration in neuromuscular movement strategy favoring shorter concentric actions relative to eccentric loading.
Score breakdown, mechanism chain, raw evidence, ideal studies needed
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.