A 68-year-old woman wants to begin an exercise program to keep herself healthy. What would you advise?
a. It is too late to begin an exercise program if she has not been exercising previously.
b. She should aim for 150 minutes of exercise or whatever she can safely perform each week.
c. She should perform vigorous weight-bearing exercise if she has lost bone density.
d. Resistance training may accelerate muscle loss and should be avoided.
e. She should limit exercise to seated, upper-body workouts so she doesn't elevate her heart rate.