Hypertrophy Past and Present 029 Elevated MPS ≠ muscle growth
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Dec 7, 2025 Dive into the legacy of John Grimek, where his full-body gaining routine reveals the practicality of Silver Era training. Explore the concept of muscle protein synthesis (MPS) and its relationship to muscle growth, debunking misleading assumptions. Discover why elevated MPS doesn’t guarantee hypertrophy, especially in various scenarios like injuries and aerobic exercise. Learn how external factors like diet and stress impact muscle breakdown, shaping insights for natural athletes managing their training and recovery.
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Controlled Muscle Injury Raises MPS Without Growth
- Researchers induce localized non-exercise muscle injury (e.g., controlled contusion) and observe delayed MPS spikes at 24–48 hours.
- That MPS rise repairs damaged tissue but does not cause hypertrophy.
Protein Alone Raises Turnover, Not Mass
- Protein feeding elevates MPS but is not anabolic alone; it accelerates protein turnover without adding net muscle.
- Mechanical tension (exercise) is the necessary signal to convert elevated MPS into added muscle.
Aerobic Work Elevates MPS Without Hypertrophy
- Aerobic exercise can elevate MPS for days due to damage repair yet fail to produce hypertrophy after training programs.
- Delayed MPS after aerobic work typically reflects repair and fatigue-resistance adaptations, not muscle growth.