Applied anatomy and kinesiology; the mechanism of muscular movement . Fig. 169.—Gymnasticstanding position. Fig. 170.—Raising one leg sideward while standing onone foot. Standing on one foot causes an increased tension of several trunkmuscles because the balance is so unstable. In a vigorous balanc-ing exercise, such as is used in every lesson of Swedish gymnastics^the muscles on all sides of the waist are brought into strong con-traction to hold the trunk firm and immovable. When the free foot is carried well to the side not only is therestrong contraction of the gluteus medius and minimus of
Applied anatomy and kinesiology; the mechanism of muscular movement . Fig. 169.—Gymnasticstanding position. Fig. 170.—Raising one leg sideward while standing onone foot. Standing on one foot causes an increased tension of several trunkmuscles because the balance is so unstable. In a vigorous balanc-ing exercise, such as is used in every lesson of Swedish gymnastics^the muscles on all sides of the waist are brought into strong con-traction to hold the trunk firm and immovable. When the free foot is carried well to the side not only is therestrong contraction of the gluteus medius and minimus of bothsides, as can easily be felt, but the trunk muscles contract to help. 286 GYMNASTIC MOVEMENTS If the trunk is held erect, as the Swedish system requires (Fig. 97),the trunk muscles on the side of the free limb contract to hold thespine laterally flexed; if the trunk tips over in line with the freelimb the same muscles act to sustain the weight of the trunk (). When the free foot is raised toward the rear the hamstring groupacts strongly on the side
Size: 1399px × 1786px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksu, booksubjectphysicaleducationandtraining
