After running for 24 hours straight, elite runners can't jump as high right after finishing—sometimes less than one-fifth of their normal jump height.
Scientific Claim
After a 24-hour ultramarathon, elite athletes experience an 84% reduction in counter-movement jump height immediately post-race, indicating severe acute impairment in lower-body power output.
Original Statement
“CMJ height was reduced immediately after the race (-84.0 ± 25.2%, p < 0.001)”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design cannot support claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The claim is descriptive and reports observed data without implying causation. The verb 'experience' is neutral and appropriate for observational data. No overstatement detected.
Evidence from Studies
Supporting (1)
Unknown Title
After running for 24 hours straight, elite runners couldn't jump as high anymore—by about 84% right after finishing—meaning their legs were extremely tired and weak, which the study measured and confirmed.