Applied anatomy and kinesiology, the mechanism of muscular movement . The latter way is more saving of energy and so everyonenaturally does it that way. If we want the movement to train asense of erect position rather than to get the work done in theeasiest way, we insist that the pupils keep the erect posture. When the movement is made slowly and without resistance otherthan the weight of the arms, we may not be able to feel any con-traction of the lumbar extensors, but if weights are used or if it ismade quickly the added contraction is plainly felt. With increasedresistance the hamstring mu
Applied anatomy and kinesiology, the mechanism of muscular movement . The latter way is more saving of energy and so everyonenaturally does it that way. If we want the movement to train asense of erect position rather than to get the work done in theeasiest way, we insist that the pupils keep the erect posture. When the movement is made slowly and without resistance otherthan the weight of the arms, we may not be able to feel any con-traction of the lumbar extensors, but if weights are used or if it ismade quickly the added contraction is plainly felt. With increasedresistance the hamstring muscles and finally the extensors of the GYMNASTIC MOVEMENTS 279 ankle come into action. When one arm is raised alone the actionof the erector spina? and extensors of the limbs is more marked onthe opposite side. Raising Arms Sideward.—In raising arms sideward the weightsof the arms balance each other and little or no associated actionof trunk muscles is needed, but if only one arm is raised the centerof gravity is displaced just as much as in the forward
Size: 1151px × 2172px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksu, booksubjectphysicaleducationandtraining
