Moderate aerobic exercise includes activities such as brisk walking, biking, swimming and mowing the lawn. Vigorous aerobic exercise includes activities such as running, swimming laps, heavy yardwork and aerobic dancing. You can do strength training by using weight machines or free weights, your own body weight, heavy bags, or resistance bands. You also can use resistance paddles in the water or do activities such as rock climbing. If you want to lose weight, keep off lost weight or meet specific fitness goals, you may need to exercise more.