...this book are designed to act upon the back, chest, and side and front walls of the abdominal cavity. A sufficient number of muscles should be called into...considerations to bear in mind in regard to exercise, for in such general activity all parts of the body are improved by your physical efforts. Part III...

...designed to act upon the back, chest, and side and front walls of the abdominal cavity. A sMfficient number of muscles should be called into action at...considerations to bear in mind in regard to exercise, for in such general activity all parts of the body are improved by your physical efforts. Part III...

...to lead to the straining of parts that are weak, by gauging their strength by parts that are strong. (5) A sufficient number of muscles should be called...considerations to bear in mind in regard to exercise. The more muscles a person can use at one time, and the more rapid and extensive the movement, the greater...

...develop force enough, and that the amount of work done would be limited to their capacity. Therefore, a sufficient number of muscles should be called into...lungs, and increase the circulation and respiration. What is commonly called endurance or stayiug power depends not so much upon the strength and size of...