Caffeine effects on VO
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
caffeine (CAF) ingestion | increase | ergogenic effects | different cycling exercise modes | - | have been observed | #1 |
caffeine (CAF) ingestion | decrease | ratings of perceived exertion (RPE) | - | - | have been associated with alterations in | #2 |
caffeine (CAF) | decrease | RPE | - | - | may reduce | #3 |
caffeine (CAF) | increase | maximal incremental test (MIT) outcomes | - | - | improving | #4 |
caffeine (CAF) | increase | MIT performance outcomes | - | - | improved | #5 |
caffeine (CAF) | increase | time to exhaustion | - | - | improved | #6 |
caffeine (CAF) | increase | W | - | - | improved | #7 |
placebo perceived as caffeine (PLA) | increase | MIT performance outcomes | - | - | improved | #8 |
placebo perceived as caffeine (PLA) | increase | time to exhaustion | - | - | improved | #9 |
placebo perceived as caffeine (PLA) | increase | W | - | - | improved | #10 |
BACKGROUND: Ergogenic effects of caffeine (CAF) ingestion have been observed in different cycling exercise modes, and have been associated with alterations in ratings of perceived exertion (RPE). However, there has been little investigation of maximal oxygen uptake (VO AIM: This study aimed to verify whether CAF may reduce RPE, thereby improving maximal incremental test (MIT) outcomes such as VO METHODS: Nine healthy individuals performed three MITs (25 W/min until exhaustion) in a random, counterbalanced fashion after ingestion of CAF, placebo perceived as caffeine (PLA), and no supplementation (baseline control). VO RESULTS: VO CONCLUSIONS: Compared with control, CAF and PLA improved MIT performance outcomes such as time to exhaustion and W