Deep FitnessResearch shows that increasing your muscle strength is the single most important thing you can do for your physical and mental health. This book shows you how in just 30 minutes a day, once or twice a week using the science backed MSTF method. The mixed messages weve received about exercise, aerobics, and mental and physical fitness are all misleading or at least incomplete. Clinical research shows that we lose muscle mass as we age, and that