The principles of health control . hey are relaxed and (b) when they are contracted. 2. By theforce of contraction. With suitable instruments, called dynamom-eters (Figs. 10 and n), test the contracting force of the moreprominent muscles, such as those of the arms, shoulders, andthighs, making records. 3. By endurance. Determine the amountof physical work which can be done in a day without feeling run CONTROL THROUGH EXERCISE 65 down and weak on the day following. This may be measuredby the number of miles which one walks or by some kind of physicallabor which he performs. To Observe the Effec
The principles of health control . hey are relaxed and (b) when they are contracted. 2. By theforce of contraction. With suitable instruments, called dynamom-eters (Figs. 10 and n), test the contracting force of the moreprominent muscles, such as those of the arms, shoulders, andthighs, making records. 3. By endurance. Determine the amountof physical work which can be done in a day without feeling run CONTROL THROUGH EXERCISE 65 down and weak on the day following. This may be measuredby the number of miles which one walks or by some kind of physicallabor which he performs. To Observe the Effects of Exercise. —i. On breathing. While ina resting condition, count the number of respirations per minute,and with the sphirometer (page 115) measure the tidal air. Afterfive minutes of vigorous exercise, again count the respirations andmeasure the tidal air. From the data thus obtained, estimate theincrease in the volume of air passing through the lungs per minuteon account of the exercise. 2. On the circulation. During a con-.
Size: 1538px × 1625px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjecthygiene, bookyear1920
