In a study comparing aerobic conditioning for the lower extremities with balance retraining, the BEST extrapolation is that upper-extremity aerobic and resistance training may accelerate speed for which task?

• A. Propelling a manual wheelchair
• B. Performing dressing activities
• C. Rolling from supine position to prone position
• D. Completing a sliding board transfer

Answer: (A)

The main idea is that improving upper-body endurance and strength directly enhances a task that relies on the arms for propulsion. Manual wheelchair speed depends on repeated, powerful pushes of the shoulders, elbows, and wrists, so increasing upper-extremity aerobic capacity lets you maintain a faster pace longer, and greater upper-limb strength lets you generate more propulsive force per stroke. Training the upper body in this way would thus most directly accelerate how fast someone can propel a manual wheelchair. The other tasks—dressing, rolling, and sliding-board transfers—depend more on balance, coordination, and specific transfer skills than on sustaining upper-limb propulsion speed, so upper-extremity cardio/strength gains wouldn’t map as directly to faster performance in those activities.