Myofibril
Long protein structures within muscle fibers containing the contractile elements.
Updated
Myofibrils are cylindrical protein structures running the length of muscle fibers, containing chains of sarcomeres. They are the actual contractile components of muscle. Myofibrillar hypertrophy increases the number and size of myofibrils, directly increasing strength. This type of hypertrophy is emphasized by heavy training.
Examples
- Contains sarcomeres in series
- Myofibrillar hypertrophy = strength gains
- Increased from heavy training
Common questions
What is Myofibril?
Long protein structures within muscle fibers containing the contractile elements. Myofibrils are cylindrical protein structures running the length of muscle fibers, containing chains of sarcomeres.
What are examples of Myofibril?
Contains sarcomeres in series; Myofibrillar hypertrophy = strength gains; Increased from heavy training.
Put it into practice
12-Week Muscle Building · £29
A 12-week, four-day hypertrophy plan in three phases, with a modest calorie surplus