To improve core strength, think in terms of 'dynamic stability' of the whole body.
Most of us are familiar with the world of 'core stability'. The theoretical basis of core training is to increase the recruitment efficiency of the smaller, deeper 'stabilising' muscles around the hip and pelvis. The stars of the show tend to be the transverse abdominus (deep lateral abdominal muscle), multifidus (deep lumbar muscle) and gluteus medius (small pelvic muscle). The exercises to isolate and train these muscles are well known and will not be covered again in this article.
Article complet http://www.sportsinjurybulletin.com/archive/core-strength-training.html
Exercices http://www.exrx.net/WeightExercises/Quadriceps/DBLunge.html
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