. Applied anatomy and kinesiology. Fig. 183.—Bicycling, erect position. (Photo by Ethel Perrin.). Fig. 184.—Bicycling, stooped position. (Photo by Ethel Perrin.) The position just described uses the extensors of the spine insuch an elongated position that it is bad for posture when takentoo often or for too long a time. Since boys are apt to be moreinterested in speed than in posture it is important to teach tlu^n 300 PLAYS, GAMES AND SPORTS how to follow the pedal with the foot and to have their bicyclesequipped with toe clips, so that they can get the racers speedwithout his characteristic h
. Applied anatomy and kinesiology. Fig. 183.—Bicycling, erect position. (Photo by Ethel Perrin.). Fig. 184.—Bicycling, stooped position. (Photo by Ethel Perrin.) The position just described uses the extensors of the spine insuch an elongated position that it is bad for posture when takentoo often or for too long a time. Since boys are apt to be moreinterested in speed than in posture it is important to teach tlu^n 300 PLAYS, GAMES AND SPORTS how to follow the pedal with the foot and to have their bicyclesequipped with toe clips, so that they can get the racers speedwithout his characteristic hump. QUESTIONS AND EXERCISES. 1. Explain the peculiarity of walk developed by practice on rough ground. Areadditional muscles brought in when the surface is rough or is it only a change in theway of using the same muscles? 2. What muscles are rested by changing hands in pitching grain? 3. A boy picking strawberries and another picking cherries change work. Whatmviscle groups are rested in each boy? 4. One shoveler throws the clay from a trench six feet deep while another throwsthe same soil
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Keywords: ., bo, bookcentury1900, bookdecade1910, bookpublishernp, bookyear1917
