Final answer:
Increase upper body strength for wheelchair propulsion, a CTRS would likely use weight training (option a) , a type of anaerobic exercise, because it effectively builds muscle and bone strength, balance, and coordination.
Step-by-step explanation:
To increase a client's upper body strength for propelling a wheelchair over longer distances, a Certified Therapeutic Recreation Specialist (CTRS) would most likely use weight training. Weight training is a form of anaerobic exercise which involves brief, high-intensity activities that cause muscles to grow bigger and stronger. Such exercises include lifting weights or using resistance bands, and they help in improving muscle and bone mass, balance, and coordination.
Anaerobic exercises like resistance training and weightlifting are designed to work against a resistance, which could be a weight or the person's own body weight. For someone who needs to build upper body strength, such exercises would apply specific forces and torques to strengthen the muscles that are essential for wheeling a wheelchair. In contrast, aerobic exercises would serve better for increasing cardiovascular health and muscular endurance but are not as effective for building muscle strength as anaerobic exercises.