Which of the Following Is True with Regard to Exercise

Which of the following is true with regard to exercise in patients with ALS?

A) When prescribing exercises,therapists must strive to attain a balance between promoting optimal use of intact muscles and preventing overuse fatigue.
B) Strengthening exercises are most effective in the weakest muscles,as these have the greatest room for improvement.
C) Exercise should be prescribed at moderate-to-high intensities; otherwise it is not effective for improving strength and endurance.
D) Exercise is contraindicated,regardless of intensity,because it causes overwork damage.