Synergistic dominance; In a movement like a squat pattern if the glutes are weak and unable to contract to their full potential, your body will call upon other "helper" muscles to finish the movement. This is called synergistic dominance! And if the glutes are not able to contract in a squat the hamstrings and erector spinae will have to. You may feel like your hamstrings and lower back are tight when in fact that they are just "bracing" as a way to protect you from an injury.
In the picture above you can see in 1. how an anterior tilt of the pelvis will affect the joints and basically internally rotate your femur and tibia as well as pronate your foot. In 2. you see how coupled with the joint mechanics of 1 you will get a specific pattern of muscle compensations to go along with your anterior tilt.
Upper-Crossed Syndrome (UCS) is also referred to as proximal or shoulder girdle crossed syndrome. In UCS, tightness of the upper trapezius and levator scapula on the dorsal side crosses with tightness of the pectoralis major and minor. Weakness of the deep cervical flexors ventrally crosses with weakness of the middle and lower trapezius. T See more at: http://www.muscleimbalancesyndromes.com/janda-syndromes/upper-crossed-syndrome/#sthash.KpQPinec.dpuf
Las cadenas musculares son el conjunto de músculos estáticos que, junto con las cadenas miofasciales, actúan en común para distribuir las fuerzas y mantener nuestra postura. Además, actúan en la bipedestación y en la marcha
Hip Stability Exercises for Runners to Prevent ITBS