The Effect of Menstrual Cycle Phase and Protein Dose on Muscle Protein Synthesis in Response to Exercise in Young Females
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Muscle Protein Synthesis
- Sponsor
- University of Exeter
- Enrollment
- 28
- Locations
- 1
- Primary Endpoint
- Muscle protein synthesis
- Status
- Completed
- Last Updated
- last year
Overview
Brief Summary
Adaptation to resistance exercise requires maximal rates of muscle protein synthesis, which can be achieved with post-exercise ingestion of ~20g of protein. These recommendations are based on studies in males and responses in females may vary.
Muscle recovery is related to the ability to build new muscle protein from amino acids (muscle protein synthesis). This response is thought to be impacted in females by hormones that fluctuate across different phases of the menstrual cycle. However, the effect of menstrual cycle phase on muscle protein synthesis is not known.
Investigators
Eligibility Criteria
Inclusion Criteria
- •BMI between 18 and 30
- •Recreationally active
- •Regular menstrual cycle
Exclusion Criteria
- •Metabolic disease
- •Any motor disorder
- •Use of over-the-counter pharmaceuticals, during the study.
- •Pomegranate, milk or lidocaine allergy
- •Taken contraceptives in the past 3 months
- •Irregular menstrual cycle (less than 9 cycles per year and a length not between 21-35 days)
- •Post-menopausal women
- •Pregnancy and lactation
Outcomes
Primary Outcomes
Muscle protein synthesis
Time Frame: 7.5 hours
The rate of synthesis of new muscle protein
Secondary Outcomes
- Plasma amino acid kinetics(7.5 hours)
- Serum insulin concentrations(7.5 hours)
- Blood flow(7.5 hours)
- Gene expression(7.5 hours)
- Blood glucose(7.5 hours)
- Sex hormone concentrations(5 minutes)