Offers trusted and straightforward guidance on the latest circuit and resistance training, and all-new information on the highly popular bodyweight and High Intensity Interval Training (HIIT). Whether working with dumbbells, free weight sets, or machines, find out how to combine weight training with other exercise to properly strength train and get in the best shape of your life. Along with aerobic exercise and flexibility, body weight training is an integral part of a complete physical activity program. Want to get pumped about weight training? Consider these facts: strength training, whether via free weights or a machine, builds muscle. And the more muscle you have, the higher your metabolism and the less prone you are to injuries--in and out of the gym. Plus, strength training promotes bone strength, which can significantly reduce your odds of developing osteoporosis.