What aspect of muscular fitness is best addressed by a client adhering to the following regimen?
a. frequency: provide at least 72 hours recovery time between exercises for the same muscle groups.
b. intensity: between 70 and 80% of maximum resistance, reaching fatigue between 50 and 70 seconds.
c. repetitions: eight to 12.
d. sets: three to four sets with 30 to 60 seconds rest between successive training sets.
e. type: a combination of multi-joint and single-joint exercises using various techniques, including breakdown training and assisted training.