The influence of caffeine ingestion on strength and power performance in female team-sport players.
Study Goal
The researchers aimed to determine whether caffeine supplementation improves knee flexor and extensor strength before, during, and after intermittent running exercise in female team-sport players taking oral contraceptive steroids.
Results Summary
Caffeine supplementation significantly increased eccentric strength of the knee flexors and power in female team-sport players during intermittent running and the following morning.
Population
Ten healthy female team-sport players (24 ± 4 years; 59.7 ± 3.5 kg) taking low-dose monophasic oral contraceptives.
Effective Dosage
6 mg/kg body weight, single dose.
Duration
Acute (single administration).
Interactions
None mentioned.
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
caffeine supplementation | increase | eccentric strength of the knee flexors | female team-sport players taking oral contraceptive steroids (OCS) | - | significantly increased | #1 |
caffeine supplementation | increase | eccentric strength | female team-sport players taking OCS | - | increased | #2 |
caffeine supplementation | increase | power | female team-sport players taking OCS | - | increased | #3 |
BACKGROUND: The aim of this study was to examine the influence of caffeine supplementation on knee flexor and knee extensor strength before, during and after intermittent running exercise in female team-sport players taking oral contraceptive steroids (OCS). METHOD: Ten healthy females (24 ± 4 years; 59.7 ± 3.5 kg; undertaking 2-6 training sessions per week) taking low-dose monophasic oral contraceptives of the same hormonal composition took part in a randomised, double-blind, placebo-controlled crossover-design trial. Sixty minutes following the ingestion of a capsule containing 6 mg∙kg RESULTS: Caffeine supplementation significantly increased eccentric strength of the knee flexors ( CONCLUSION: Caffeine supplementation increased eccentric strength and power in female team-sport players taking OCS both during an intermittent running protocol and the following morning.