| Full text | |
| Author(s): |
Barreto, G.
;
Loureiro, L. M. R.
;
Reis, C. E. G.
;
Saunders, B.
Total Authors: 4
|
| Document type: | Journal article |
| Source: | European Journal of Sport Science; v. N/A, p. 12-pg., 2022-03-16. |
| Abstract | |
The aim of this systematic review with meta-analysis was to determine the effect of caffeine gum (Caff-gum) on exercise performance-related outcomes. Several databases were searched for studies assessing the effect of Caff-gum in placebo-controlled protocols involving healthy adults. Random-effects meta-analyses using standardized mean differences (SMD) were performed to determine the effect of Caff-gum on exercise outcomes with several sub-analyses (training status, exercise type, timing and dose) for potential modifying factors. 14 studies were included, totalling 200 participants. There was a significant overall effect of Caff-gum compared to placebo (SMD = 0.21, 95%CI: 0.10-0.32; p = 0.001). Subgroup analysis showed improved performance for trained (SMD = 0.23, 95%CI: 0.08-0.37; p = 0.004), but not for untrained (SMD = 0.14, 95%CI: -0.02-0.29; p = 0.07) individuals. Caff-gum improved both endurance (SMD = 0.27, 95%CI: 0.12-0.42; p = 0.002) and strength/power (SMD = 0.20, 95%CI: 0.03-0.37; p = 0.03) performance outcomes. Caff-gum was ergogenic when consumed within 15 min prior to initiating exercise (SMD = 0.27, 95%CI: 0.07-0.4; p = 0.01), but not when provided >15 min prior (SMD = -0.48, 95%CI = -1.7-0.82; p = 0.25). There was no significant effect of Caff-gum with doses <3 mg/kg body mass (BM) (SMD = 0.20, 95%CI: -0.03-0.43; p = 0.07), but there was a significant effect when the dose was >= 3 mg/kg BM (SMD = 0.22, 95%CI: 0.07-0.37; p = 0.01). Caff-gum supplementation may be an effective ergogenic strategy for trained athletes involved in both endurance and strength/power exercise, using a recommended dose of >= 3 mg/kg BM consumed within 15 min of initiating exercise. (AU) | |
| FAPESP's process: | 17/15314-1 - The influence of the CYP1A2 polymorphism on the physiological responses and performance following acute supplementation with caffeine |
| Grantee: | Gabriel Henrique Castanho Barreto |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 16/50438-0 - Nutritional suplementation and exercise to optimize exercise performance: focus on individual responses and a step towards personalized sports nutrition |
| Grantee: | Bryan Saunders |
| Support Opportunities: | Research Grants - Young Investigators Grants |