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 Ā± 0.09 m, mean weight: 81.3 Ā± 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.
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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