NCT06606652

Caffeine, Resistance Exercise and EMG

Effect of Acute Caffeine Intake on Muscle Electrical Activity and Muscular Strength, Power, and Endurance Performance

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 12 (actual)
• Sponsor: University of Alcala · Academic / Other
• Sex: All
• Age: 18 Years – 35 Years
• Healthy volunteers: Accepted

Summary

Introduction: Several studies have evaluated and confirmed the ergogenic effects of acute caffeine intake on sports performance. However, some studies suggest that this effect predominantly occurs in large muscle groups, potentially due to increased skeletal muscle electrical activity. Objectives: This study aims to evaluate the acute effects of caffeine intake on strength, power, muscle endurance, and muscle electrical activity in young adults. It will also analyze the influence of circadian rhythms (morning vs. afternoon) on exercise performance (bench press vs. squat). Methods: Twelve healthy, physically active participants will be recruited for the study. Using a triple-blind, crossover, randomized, and controlled design, participants will ingest either caffeine (3 mg/kg body mass) or a placebo (maltodextrin, 3 mg/kg) 60 minutes before the trial. Muscular strength, power, and endurance performance will then be assessed through 1RM tests, and at 25%, 50%, 75%, and 90% of 1RM, along with muscle endurance tests at 65% of 1RM, for both squat and bench press exercises. EMG will be used to measure skeletal muscle electrical activity during the tests. The experimental sessions will be conducted in the morning (8:00 am to 10:00 am) and the afternoon (4:30 pm to 6:30 pm).

Conditions

• Caffeine

Interventions

Type	Name	Description
DIETARY_SUPPLEMENT	Caffeine	Acute caffeine intake (3 mg/kg)
DIETARY_SUPPLEMENT	Placebo	Acute placebo intake (3 mg/kg of maltodextrin)

Timeline

• Start date: 2023-09-01
• Primary completion: 2024-04-30
• Completion: 2024-04-30
• First posted: 2024-09-23
• Last updated: 2024-09-23

Locations

1 site across 1 country: Spain