Caffeine and Physiological Responses to Submaximal Exercise: A Meta-Analysis.
Study Goal
The researchers aimed to systematically review and meta-analyze the effects of caffeine supplementation on physiological responses during submaximal exercise.
Results Summary
The study analyzed 26 double-blind, randomized crossover trials and found that caffeine supplementation influenced physiological responses during sustained submaximal exercise (60-85% VO2 max). The results suggest caffeine may enhance performance or alter physiological metrics in this context.
Population
Individuals performing submaximal exercise (60-85% VO2 max).
Effective Dosage
3-6 mg·kg
Duration
Not specified (single-dose or short-term interventions implied).
Interactions
None mentioned
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
caffeine supplementation | decrease | rating of perceived exertion | human participants | - | reduced | #1 |
caffeine supplementation | increase | blood lactate concentration | human participants | - | increased | #2 |
caffeine supplementation | increase | heart rate | human participants | - | increased | #3 |
caffeine supplementation | increase | oxygen consumption | human participants | - | increased | #4 |
caffeine supplementation | increase | ventilation | human participants | - | increased | #5 |
caffeine supplementation | increase | plasma epinephrine concentration | human participants | - | increased | #6 |
caffeine supplementation | increase | plasma norepinephrine concentration | human participants | - | increased | #7 |
caffeine supplementation | increase | free fatty acid concentration | human participants | - | increased | #8 |
caffeine supplementation | increase | glycerol concentration | human participants | - | increased | #9 |
The aim of this study was to carry out a systematic review and meta-analysis of the effects of caffeine supplementation on physiological responses to submaximal exercise. A total of 26 studies met the inclusion criteria of adopting double-blind, randomized crossover designs that included a sustained (5-30 min) fixed-intensity bout of submaximal exercise (constrained to 60-85% maximal rate of oxygen consumption) using a standard caffeine dose of 3-6 mg·kg