No Dumbbells Required: 5 Strength-Building Exercises

To begin building muscle, you don't need a gym membership—or even a set of hand weights. Here are a few classic exercises you can do almost anywhere. With each, strive for three sets of eight to 12 repetitions, resting 30 to 60 seconds between sets; as the exercises become easier, mix up your routine to challenge your muscles in different ways. (For more moves, check out acefitness.org/exerciselibrary).

Squats