Muscle Glycogen Synthesis When Caffeine and Protein is Co-Ingested With Carbohydrates

The Effect of Caffeine or Protein Co-ingestion With Carbohydrate on Post-exercise Muscle Glycogen Synthesis Rate.

The aim of the present study is to investigate the effect of added protein+leucine or caffeine to 1.2 g/kg/h CHO on the rate of post-exercise muscle glycogen re-synthesis in healthy, recreational athletes.

The investigators hypothesize that both interventions (the addition of caffeine or protein+leucine) will lead to higher glycogen re-synthesis compared to the ingestion of CHO only, and that the co-ingestion of protein and leucine will result in the highest muscle glycogen synthesis rates.

Inclusion Criteria:

• male cyclists
• healthy
• BMI < 25

Exclusion Criteria:

• female
• use of medication
• non cycling
• BMI > 25