Caffeine is widely used by rugby players for its performance-enhancing effects. The main questions it aims to answer are: (1) the impact of caffeine supplementation on various performance metrics, including distance covered at different speeds, acceleration, deceleration, collisions, and repeated high-intensity efforts; and (2) reactive agility, across four matches over two consecutive days in collegiate male rugby sevens players.A position-matched, double-blind, randomized crossover design was employed, with six male collegiate rugby players (mean height: 1.78 ± 0.09 m, mean weight: 81.3 ± 9.2 kg) participating in two trials. Each trial consisted of a two-day tournament, with two matches per day. Movement was monitored using global positioning system units.
Age range
18 Years
Sex
MALE
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Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Total Distance and Distance Covered in Speed Zones
Timeframe: Each trial contained 2 days, with 2 matches on each day. Each participant completed 2 trials
Acceleration and Deceleration
Timeframe: Each trial contained 2 days, with 2 matches on each day. Each participant completed 2 trials
collision
Timeframe: Each trial contained 2 days, with 2 matches on each day. Each participant completed 2 trials
Repeated High-Intensity Effort
Timeframe: Each trial contained 2 days, with 2 matches on each day. Each participant completed 2 trials
Reactive Agility
Timeframe: Each trial contained 2 days, with 2 matches on each day. Reactive agility was measured before each match. Each participant completed 2 trials