In most cases, it takes 8 to 12 weeks before you “see” benefits. Depending on your baseline fitness level, how frequently and how hard you exercise, and your goals, the sort of outcomes you “see” will vary greatly from person to person. But more significantly, you will start to “feel” the effects of exercise right away. We make an effort to downplay the importance placed on the outward manifestations of exercise and instead emphasize the many positive effects it may have on your health, including an increase in energy, a decrease in stress levels, and an improvement in your strength.