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Stretch-Mediated Hypertrophy Definition
- Stretch-mediated hypertrophy refers to extra growth from training in stretched positions.
- This "extra" growth comes from adding sarcomeres in series (sarcomerogenesis), unlike typical hypertrophy from adding myofibrils in parallel.
Fascicle Length Adaptation Timeline
- Increases in muscle fascicle length occur rapidly, within weeks.
- These increases plateau much sooner than cross-sectional area increases, which develop more gradually.
Fiber Length vs. Sarcomere Length
- Muscle fiber length and sarcomere length are distinct concepts.
- A muscle fiber can be lengthened without experiencing passive tension, crucial for stretch-mediated hypertrophy.