The primary objective will be to determine the effect of leucine-enriched essential amino acids (LEAA) compared to carbohydrate placebo on dietary incorporation of [D5] Phenylalanine & [D5] Glycine into the three skeletal muscle protein pools (myofibrillar, sarcoplasmic and collagen), both following resistance exercise and at rest, with the two tracers provided as a 'intrinsically labeled' bolus. Other outcomes will relate to molecular regulation of protein synthesis.

Inclusion Criteria:

• Healthy, male and female, recreationally-active participants.
• Healthy will be defined as screened by the PAR-Q+ (The Physical Activity Readiness Questionnaire for everyone; Appendix B).
• Self-reported not having engaged in resistance exercise and/or lower body plyometrics for at least 3 months prior to the study.
• Participants will be aged 18-35 years old.
• Participants are willing to abide by the compliance rules of this study.
• Self-reported regular menstrual cycle (25-35d) within the last 3 months (female participants).

Exclusion Criteria:

• Inability to adhere to any of the compliance rules judged by principle investigator or medical doctor.
• Self-reported regular tobacco use.
• Self-reported illicit drug use (e.g. growth hormone, testosterone, etc.).
• Individuals who have participated in studies within the past year involving any of the stable isotopes in the study.
• Use of birth control and discontinued use within the last 3 months (female participants).

Double blinded (investigators and participants). A lab member external to the investigation will code items for the intervention.