How energy moves in your muscles
High-energy phosphate transfer in human muscle: diffusion of phosphocreatine.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
PCr can travel 66 micrometers during its half-life — over 30 times the distance needed to reach its target.
Many assumed diffusion might be a bottleneck in energy transfer, especially during high-intensity exercise. This shows it's not limiting — at least at rest.
Practical Takeaways
Taking creatine supplements may help maintain high PCr levels, supporting rapid energy delivery during workouts.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
PCr can travel 66 micrometers during its half-life — over 30 times the distance needed to reach its target.
Many assumed diffusion might be a bottleneck in energy transfer, especially during high-intensity exercise. This shows it's not limiting — at least at rest.
Practical Takeaways
Taking creatine supplements may help maintain high PCr levels, supporting rapid energy delivery during workouts.
Publication
Journal
American journal of physiology. Cell physiology
Year
2011
Authors
R. Gabr, A. El-Sharkawy, M. Schär, R. Weiss, P. Bottomley
Related Content
Claims (6)
Creatine helps shuttle energy from where it's made in the cell to where it's needed, kind of like a rechargeable battery moving power from a charger to your phone.
In healthy adult muscles at rest, a molecule called phosphocreatine moves more easily along the length of muscle fibers than across them—like sliding along a hallway instead of pushing through walls—because the muscle's internal structure guides its movement.
In healthy adult muscles, a molecule called phosphocreatine doesn't move freely — it's kind of boxed in by cell walls, and the size of those boxes matches the size of the muscle fibers themselves.
In resting human muscles, a molecule called phosphocreatine can travel far enough to deliver energy where it's needed, even between distant parts of the muscle cell — kind of like a tiny energy shuttle making the rounds.
In healthy human muscles, a molecule called phosphocreatine moves around at a specific speed when there's nothing blocking it — and scientists use that speed to understand how energy gets shuttled inside cells.