A poorly developed trunk is a weak support for hard-working limbs. Strength training programs should first strengthen the core muscles before focusing on the arms and legs.
Core muscles act as shock absorbers during jumps, rebounds, or plyometric exercises; stabilize the body; and represent a link, or transmitter, between the legs and arms. Weak core muscles fail in these essential roles, limiting the athlete’s ability to perform. Most of these muscles seem to be dominated by slow-twitch muscle fibers because of their supporting role to the arms and leg. They contract constantly, but not necessarily dynamically, to create a solid base of support for the actions of other muscle groups of body.
出處：Tudor O. Bompa & Michael Carrera (2005). Periodization training for sports 2nd edition., 47. United States of America: Human Kinetics.
- 側棒式(Side Plank)