. Applied anatomy and kinesiology. n the handshave been placed upon the mat the head is extended and placedon the mat a foot or thereabouts in front of the hands. Using thehead and the hands as the three legs of a stool the gymnast, bycareful extension of his elbows, and of his spine, lifts his limbsvertically into the air. Although much of the body weight mustbe borne by the arms, the latter must gradually flex more and moreas the hips and spine extend so as to keep the balance. The exten-sors of the arms and of the spine and limbs have the work to doin this exercise, for as soon as the weigh
. Applied anatomy and kinesiology. n the handshave been placed upon the mat the head is extended and placedon the mat a foot or thereabouts in front of the hands. Using thehead and the hands as the three legs of a stool the gymnast, bycareful extension of his elbows, and of his spine, lifts his limbsvertically into the air. Although much of the body weight mustbe borne by the arms, the latter must gradually flex more and moreas the hips and spine extend so as to keep the balance. The exten-sors of the arms and of the spine and limbs have the work to doin this exercise, for as soon as the weight is carried far enough backto call the abdominal muscles into action the balance is lost. The headspring begins like the headstand. The body weightshould be balanced on the head and hands with hips fully flexed andknees nearly straight (Fig. 171). When this position is gained theelbows should be gradually extended by action of the triceps untilthe body begins to fall backward. A sudden and strong extension GYMNASTIC MOVEMENTS 279. Fig. 171
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