Endpoint
Repeated-sprint performance decrement
CAT:outcome/repeated-sprint-decrementreported in percent4 findings from 3 compounds
What moved it
How to read these marks4 findings · 3 compounds · 1 null · by evidence strength
| Compound | Direction | Findings | Strongest evidence |
|---|---|---|---|
| creatine | down | 1 | Evidence strength: moderate. Human evidence with one recorded weakness, or capped at moderate by its design or by unread numbers. |
| caffeine | up 1 · no effect 1 | 2 | Evidence strength: very limited. Human evidence with major recorded weaknesses, or non-human, uncontrolled or unverified evidence. |
| L-citrulline | down | 1 | Evidence strength: very limited. Human evidence with major recorded weaknesses, or non-human, uncontrolled or unverified evidence. |
Reported to move it
3 findings
creatine — decreases
ModerateEvidence strength: moderate. Human evidence with one recorded weakness, or capped at moderate by its design or by unread numbers.Finding“However, differences between the two groups (group x pre–post interaction, p < 0.017, η2 = 0.34) were found for fatigue index for speed, with the post hoc test revealing a decrease in the average fatigue index of all sprints by 16.2% (from 12.7 ± 3.9% before supplementation to 10.6 ± 3.6% after Cr supplementation, p = 0.003).”
Quoted verbatim from Effects of Oral Creatine Supplementation on Power Output during Repeated Treadmill Sprinting.. - Study
- RCT
- Participants
- 8
- Duration
- 5 days
- Dose
- creatine monohydrate 75 mg/kg + 1 g glucose, 4 doses/day for 5 days (~22.3 ± 1.8 g Cr/day)
- Population
- recreationally active male university students, aged 19-30 years; six 10-second treadmill sprints
Effects of Oral Creatine Supplementation on Power Output during Repeated Treadmill Sprinting.2022PMID:35334797Permalink
caffeine — increases
Very limitedEvidence strength: very limited. Human evidence with major recorded weaknesses, or non-human, uncontrolled or unverified evidence.Finding“Relative to placebo, caffeine supplementation resulted in a 0.06-s (1.4%) reduction in fastest sprint time (95% likely range = 0.04-0.09 s), which corresponded with a 1.2% increase in fatigue (95% likely range = 0.3-2.2%).”
Quoted verbatim from Caffeine supplementation and multiple sprint running performance.. - Study
- RCT
- Participants
- 21
- Dose
- 5 mg/kg body mass caffeine, single dose 1 h before exercise
- Population
- physically active men, indoor multiple sprint running trial (12 x 30 m, repeated at 35-s intervals)
Caffeine supplementation and multiple sprint running performance.2008PMID:18799995Permalink
L-citrulline — decreases
Very limitedEvidence strength: very limited. Human evidence with major recorded weaknesses, or non-human, uncontrolled or unverified evidence.Finding“RSP was improved (i.e., evidenced by a decrease Sdec) in CM compared to PLA (Sdec: CM, 4.68 ± 1.82% vs. PLA, 6.10 ± 1.83%; p = 0.034; ES = 0.77) (Figure.”
Quoted verbatim from Effects of 3 days of citrulline malate supplementation on short-duration repeated sprint running performance in male team sport athletes.. - Study
- crossover
- Participants
- 13
- Duration
- 3 days
- Dose
- Citrulline malate (CM1000, ROS Nutrition), eight 1000 mg tablets daily (8 g/day), taken with breakfast on the two days before and on the morning of each trial.
- Population
- Thirteen male university-level team sport athletes drawn from rugby union, soccer, Gaelic games and field hockey squads, aged 18-30 years and tested during their competitive season.
Effects of 3 days of citrulline malate supplementation on short-duration repeated sprint running performance in male team sport athletes.2024PMID:38874989Permalink
Measured, no effect detected
1 finding
caffeine — no detected effect on
InsufficientEvidence strength: insufficient. Mechanistic inference, no evidence found, or evidence weakened below very limited.FindingNull result“RSP, assessed by sprint performance decrement (%), did not differ (p = .209; effect size = 0.16; N = 18) between CAF (5.00 ± 2.84%) and PLA (5.43 ± 2.68%).”
Quoted verbatim from Acute Ingestion of Caffeinated Chewing Gum Improves Repeated Sprint Performance of Team Sport Athletes With Low Habitual Caffeine Consumption.. - Study
- crossover
- Participants
- 18
- Dose
- 200 mg caffeine via chewing gum, single dose
- Population
- male team sport athletes
Acute Ingestion of Caffeinated Chewing Gum Improves Repeated Sprint Performance of Team Sport Athletes With Low Habitual Caffeine Consumption.2018PMID:29091470Permalink
How it is measured
Decline in output across successive maximal sprints within one bout, expressed as a percentage decrement or fatigue index. Sprint count and recovery interval recorded with each finding.
Sources cited
4 papers
- Subject
- repeated-sprint performance decrement
- Findings
- 4
- Papers
- 4
Effects of 3 days of citrulline malate supplementation on short-duration repeated sprint running performance in male team sport athletes.record2024PMID:388749891 finding
Effects of Oral Creatine Supplementation on Power Output during Repeated Treadmill Sprinting.record2022PMID:353347971 finding
Acute Ingestion of Caffeinated Chewing Gum Improves Repeated Sprint Performance of Team Sport Athletes With Low Habitual Caffeine Consumption.record2018PMID:290914701 finding
Caffeine supplementation and multiple sprint running performance.record2008PMID:187999951 finding