In addition to aerobic activity, what is recommended at least twice weekly for adults?

• A. Brain training.
• B. Strength training.
• C. Endurance cycling.
• D. Flexibility only.

Answer: (B)

Adding muscle-strengthening work to regular aerobic exercise is important because it builds lean muscle, supports bone health, improves metabolic function, and helps with daily tasks and balance as you age. Strength training at least twice a week ensures these benefits beyond what aerobic activity alone provides, ideally targeting all major muscle groups with exercises like lifting weights, using resistance bands, or bodyweight moves such as push-ups and squats. A practical approach is 2–4 sets of 8–12 repetitions per exercise on non-consecutive days. Brain training focuses on cognitive skills rather than physical strength, endurance cycling is a form of aerobic activity, and flexibility work alone, while beneficial, does not fulfill the requirement to strengthen muscles at least twice weekly.