NCT07474753

Coffee Increases Physical and Cognitive Performance Both in Men and Women

Habitual Caffeine Intake Affects the Ergogenicity of Dosing Regimens on Muscular Endurance But Not on Sprint and Cognitive Performance in Men and Women

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 69 (actual)
• Sponsor: Northumbria University · Academic / Other
• Sex: All
• Age: 18 Years – 30 Years
• Healthy volunteers: Accepted

Summary

The impact of caffeine habituation on acute responses to different doses of caffeinated coffee has received minimal attention. This study aimed to investigate the effects of different doses of coffee on physical and cognitive performance in men and women with different levels of daily caffeine consumption. Sixty-nine (35 women) athletes participated in this study, attending 4 experimental visits in a double-blind, randomized, crossover fashion: decaffeinated coffee (PLA), 1.5 mg·kg-1 (LCOF), 3 mg·kg-1 (MCOF) and 6 mg·kg-1 of caffeine (HCOF) from coffee ingestion. Sixty min after coffee consumption, participants performed squat and bench press exercises (1 repetition maximum, 1RM), 60% of 1RM muscular endurance (ME), maximal sprinting, and cognitive performance (CP) was assessed. Participants were allocated into low (LGROUP), moderate (MGROUP), and high (HGROUP) caffeine consumption groups.

Conditions

• Dietary Supplement
• Exercise

Interventions

Type	Name	Description
DIETARY_SUPPLEMENT	Low Dose Caffeine (LCOF)	Caffeinated versions of instant coffee were prepared in 600 ml hot water (approximately 65°C) and served in a mug. Participants ingested 0.12 g·kg-1 of decaffeinated coffee + 0.04 g·kg-1 of caffeinated coffee to achieve 1.5 mg·kg-1 of caffeine intake in LCOF 60-min before the experimental trial.
DIETARY_SUPPLEMENT	Moderate Dose Caffeine (MCOF)	Caffeinated versions of instant coffee were prepared in 600 ml hot water (approximately 65°C) and served in a mug. Participants ingested 0.08 g·kg-1 of decaffeinated coffee + 0.08 g·kg-1 of caffeinated coffee to achieve 3 mg·kg-1 of caffeine intake in MCOF 60-min before the experimental trial.
DIETARY_SUPPLEMENT	High Dose Caffeine (HCOF)	Caffeinated versions of instant coffee were prepared in 600 ml hot water (approximately 65°C) and served in a mug. Participants ingested 0.16 g·kg-1 of caffeinated coffee to achieve 6 mg·kg-1 of caffeine intake in HCOF 60-min before the experimental trial.
DIETARY_SUPPLEMENT	Placebo (PLA)	Decaffeinated versions of instant coffee were prepared in 600 ml hot water (approximately 65°C) and served in a mug. Participants ingested 0.16 g·kg-1 of decaffeinated coffee in PLA 60-min before the experimental trial.

Timeline

• Start date: 2020-12-04
• Primary completion: 2021-03-20
• Completion: 2021-03-20
• First posted: 2026-03-16
• Last updated: 2026-03-16

Locations

1 site across 1 country: Turkey (Türkiye)