A. Increase the duration of his walking each day
B. Add swimming to his current fitness routine
C. Carry a heavy backpack while walking
D. Alternate between a treadmill and walking outside
Answer:
A. Increase the duration of his walking each day
Step-by-step explanation:
The progression principle states that people have to increase the demand of their routine in a specific period of time to accomplish a maximum level of intensity that will allow to improve their form. According to this, the answer is that the best way for Jose to apply the principle of progression to his routine would be to increase the duration of his walking each day as he needs to increase the demand of it to be able to improve his form.