Which of the Following Statements Is True with Regard to Strengthening

Which of the following statements is true with regard to strengthening exercises for patients recovering from stroke?

A) Strengthening exercises are contraindicated post stroke if patients have spasticity.
B) Gravity-eliminated exercises using powderboard and/or sling suspension are appropriate for patients with less than 3/5 muscle strength.
C) Isometric exercises are the safest; both concentric and eccentric exercises increase risk of muscles tears in patients with hemiparesis.
D) Resistive exercise training should be initiated within 72 hours post stroke to prevent disuse atrophy.