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Desmin increases with high-intensity concentric contractions in humans
Mandy T Woolstenhulme1, Lisa S Jutte, Micah J Drummond
1Human Performance Research Center, 120-E Richards Building, Brigham Young University, Provo, Utah 84602, USA.
Muscle & Nerve
|October 7, 2004
Summary
Sprint training significantly increased desmin protein in untrained men, suggesting this cytoskeletal protein supports enhanced muscle force generation and adaptation to high-intensity exercise.
Area of Science:
- Exercise physiology
- Muscle biology
- Skeletal muscle adaptation
Background:
- Desmin is a cytoskeletal protein crucial for muscle structure.
- Understanding desmin's role in exercise adaptation is important for sports science.
Purpose of the Study:
- To investigate the role of desmin in muscular adaptation to high-intensity exercise.
- To measure changes in desmin protein content following sprint training.
Main Methods:
- Seven untrained men underwent 8 weeks of high-intensity cycle sprint training.
- Muscle biopsies of the vastus lateralis were analyzed for desmin and actin protein levels using immunoblotting.
- Peak and mean power output were measured before and after training.
Main Results:
- Sprint training significantly increased mean power output.
- Desmin protein levels in the vastus lateralis muscle increased by 60% post-training.
- Actin protein levels remained unchanged, indicating specific desmin adaptation.
Conclusions:
- High-intensity sprint training leads to a significant increase in desmin protein.
- Desmin content appears to correlate with increased muscle force-generating capacity.
- A reinforced desmin cytoskeleton may be essential for muscle adaptation to high-tension loads.