Endpoint
Squat jump height
CAT:outcome/squat-jump-heightreported in cm2 findings from 1 compound
What moved it
How to read these marks2 findings · 1 compound · 1 null · by evidence strength
| Compound | Direction | Findings | Strongest evidence |
|---|---|---|---|
| caffeine | no effect 1 · up 1 | 2 | Evidence strength: limited. Human evidence with several recorded weaknesses, or a design that tops out at limited. |
Reported to move it
1 finding
caffeine — increases
Very limitedEvidence strength: very limited. Human evidence with major recorded weaknesses, or non-human, uncontrolled or unverified evidence.Finding“An ergogenic effect of caffeine on jumping performance was found in the countermovement jump test (g: 0.26) and squat jump test (g: 0.35), with no subgroup differences.”
Quoted verbatim from Moderators of Caffeine's Effects on Jumping Performance in Females: A Systematic Review and Meta-Analysis.. - Study
- meta-analysis
- Population
- females; meta-analysis of caffeine and vertical jumping performance (15 studies, n = 197); squat jump test
Moderators of Caffeine's Effects on Jumping Performance in Females: A Systematic Review and Meta-Analysis.2024PMID:37191618Permalink
Measured, no effect detected
1 finding
caffeine — no detected effect on
LimitedEvidence strength: limited. Human evidence with several recorded weaknesses, or a design that tops out at limited.FindingNull result“The maximum NCAA-approved caffeine dosage did not yield a consistent or statistically significant change in SJ jump height relative to placebo.”
Quoted verbatim from Caffeine's influence on vertical jump height: a real-life collegiate student-athlete approach.. - Study
- crossover
- Participants
- 40
- Dose
- 5 mg/kg body mass anhydrous caffeine, single dose, capsule, ingested 60 minutes before testing
- Population
- NCAA Division II student-athletes, habitual caffeine users (<50 mg/day baseline)
Caffeine's influence on vertical jump height: a real-life collegiate student-athlete approach.2025PMID:40320739Permalink
How it is measured
Vertical jump height from a held static squat position, initiated without a preparatory dip, by force platform or contact mat.
Measured, not recorded
- Subject
- squat jump height
- Measurements
- 2 measurements
- Recorded as a finding
- No
Show what was measured
Squat jump height
no effect, SMD 0.241, 95% CI -0.189, 0.671
Another meta-analysis was performed including three studies that measured SJ with the intake of caffeine showing no improvement in SJ performance D: SMD: 0.241, 95% CI: −0.189, 0.671; I2 0% p = 0.870).
PMID:34684665 · one of two readings recorded this
squat jump height
no effect
No other measures for grip strength, squat jump or countermovement jump showed a main effect for conditions.
PMID:42588165 · one of two readings recorded this
Sources cited
2 papers
- Subject
- squat jump height
- Findings
- 2
- Papers
- 2