The combination of dietary protein ingestion and resistance exercise are essential to increase muscle protein synthesis. The vast majority of studies assessing protein intake following resistance exercise in young adults has been conducted exclusively in men or in studies where both men and women are assessed. The increase in muscle mass is thought to be impacted by sex hormones that fluctuate across different phases of the menstrual cycle. However, the effect of menstrual cycle phase on muscle protein synthesis following exercise is not known.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
14
Follicular or luteal phase
University of Exeter
Exeter, Devon, United Kingdom
Muscle protein synthesis
The rate of synthesis of new muscle protein
Time frame: 7 hours
Plasma amino acid kinetics
The appearance of amino acids in the circulation.
Time frame: 7 hours
Serum insulin concentrations
Basal and postprandial concentrations of serum insulin
Time frame: 7 hours
Sex hormone concentrations
Serum oestrogen and progesterone
Time frame: 5 minutes
Energy expenditure
Basal metabolic rate
Time frame: 20 minutes
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