Evidence is overwhelming that the right kinds of exercise and training produce great health and image benefits. By now, empirical evidence backed by research shows that anaerobic exercise (HIT, HIIT, Crossfit, Spinning etc.) is far superior to aerobic exercise. To top that off anaerobic exercise requires only a fraction of the time needed for any aerobic program.
Some health benefits of high intensity training (HIT) include: increased muscle mass, improved metabolism, increased energy, reduced fat, reduced stress, reduced blood pressure, reduced depression, improved sleep, normalized cholesterol, balanced blood sugar, reduced diabetes, increased bone density, improved cardiovascular function, improved coordination, improved balance and the list goes on.