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The effect of caffeine on fat oxidation in the fasted and fed state during exercise

The effect of acute caffeine supplementation on fat oxidation during exercise in the fasted and fed state in overweight and untrained men - effect of caffeine on fat oxidation during exercise in the fasted and fed state

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-UMIN000058782
Enrollment
19
Registered
2025-08-14
Start date
2025-10-20
Completion date
Unknown
Last updated
2026-09-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

overweight and untrained men

Interventions

participants ingested 5 mg of caffeine per kg of body weight in fasted . Each participant then performed 20 minutes of submaximal physical activity at 60% of their maximal oxygen consumption (VO2max).

Sponsors

Shahrood University Of Technology
Lead Sponsor

Eligibility

Sex/Gender
Male

Inclusion criteria

Inclusion criteria: being a male dormitory student, being physically inactive (based on a questionnaire), being overweight with a BMI greater than 25, having no acute respiratory problems, asthma, lower body mobility issues or injuries, and not having any specific metabolic diseases or consuming medication and performance-enhancing supplements.

Exclusion criteria

Exclusion criteria: a participant's unwillingness to continue at any stage of the test, consumption of any tobacco or alcohol, experiencing any symptoms of headache, dizziness, or weakness during the test, failure to complete the testing period, sensitivity to caffeine consumption, consuming any calorie-containing food during fasting sessions.

Design outcomes

Primary

MeasureTime frame
Fat oxidation, Carbohydrates metabolism and Resting Metabolism before exercise. Fat oxidation, Carbohydrates metabolism and Energy Expenditure during exercise. Fat oxidation, Carbohydrates metabolism and Resting Metabolism after exercise.

Countries

Asia(except Japan)

Contacts

Public Contactali akbari

Shahrood University Of Technology Physical Education and Sport Sciences

adelldonyai@yahoo.com098-2332395900

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Sep 19, 2026