The Claim
Male collegiate sprinters exhibit significant reductions in force output during the early concentric phase (50–75% of concentric time) of the countermovement jump following a 400 m sprint performed at 96.8% of their personal best time, with these deficits persisting for up to 24 hours, as identified through statistical parametric mapping of force-time curves.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
After running a 400-meter sprint really fast, college sprinters aren't as powerful when jumping — especially in the first part of the jump — and this weakness can last up to a full day.
See the scientific wording
Following a 400 m sprint at 96.8% of personal best time, male collegiate sprinters show significant reductions in force output during the early concentric phase (50–75% of concentric time) of the countermovement jump that persist for up to 24 hours, as detected by statistical parametric mapping of force-time curves.
What the research says
1 studyThe study found that after a hard 400 m sprint, college sprinters were weaker when jumping, especially in the middle part of the jump, and this weakness lasted up to a day. This matches what the claim says.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.