How Does Altering the Timing of Pre-exercise Low-dose Caffeine Ingestion Affect Endurance Exercise Performance

University of Exeter

Status: Completed

Conditions: Healthy

Treatments: Other: Caffeine powder -60; Other: Placebo powder -30; Other: Placebo powder -60; Other: Caffeine powder 0; Other: Placebo powder 0; Other: Caffeine powder -30

Study type: Interventional

Funder types: Other

Identifiers

NCT02985606

181739/02

Details and patient eligibility

About

Investigate how manipulating the time between caffeine ingestion and exercise may alter exercise performance and cognition

Enrollment: 14 patients

Sex: All

Ages: 18 to 40 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• vo2max > 55 ml/kg/min
• females on contraceptive pill

Exclusion criteria

• recent skeletal muscle injury
• cardiovascular injury
• metabolic disease

Trial design

Primary purpose: Basic Science

Allocation: Randomized

Interventional model: Crossover Assignment

Masking: Triple Blind

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14 participants in 4 patient groups, including a placebo group

Caffeine -60

Active Comparator group

Description:

Caffeine at 60 minutes prior to time trial

Treatment:

Other: Placebo powder 0

Other: Placebo powder -30

Other: Caffeine powder -60

Caffeine -30

Active Comparator group

Description:

Caffeine at 30 minutes prior to time trial

Treatment:

Other: Placebo powder 0

Other: Placebo powder -60

Other: Caffeine powder -30

Caffeine 0

Active Comparator group

Description:

Caffeine immediately prior to time trial

Treatment:

Other: Placebo powder -30

Other: Placebo powder -60

Other: Caffeine powder 0

Placebo

Placebo Comparator group

Description:

Placebo drink at all time points

Treatment:

Other: Placebo powder 0

Other: Placebo powder -30

Other: Placebo powder -60