Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to build muscle endurance [title] Build strength and endurance together. [step] Typically, at the gym you would do fewer repetitions with heavy weights to build strength, and more repetitions with light weights to build endurance. Doing both together in one routine allows you to build muscle strength, size, and endurance all at the same time.

Ending1: [substeps] For example, if you want to build endurance, begin with larger weights, like 5 lb, to work up to 10 lb. Multiply this number by 5 and think how many repetitions you would take in a week. Ending2: [substeps] Strength training not only relieves the physical side effects of weight loss, but also reduces the risk of cardiovascular damage. As a bonus, an exercise that focuses on muscle strain can help prevent certain types of injuries in the long run. Ending3: [substeps] Try dynamic form, also called wall workouts. The a strong body uses explosive speed in dynamic form, but doesn't use coordination as time seems to slow the speed down of movement. Ending4: [substeps] Design a routine that involves four exercises for each muscle group. Each exercise should target that muscle group in a different way, requiring movement from a different angle, or with different grip positions.

Answer format: ending1/ending2/ending3/ending4