Working out even three non-consecutive days a week can benefit the busiest of persons. Following a thorough warm-up, train each muscle group with one basic exercise, of 3 sets of 10 repetitions each. The routine should not take more than 45 minutes. Weight training increase metabolic rate, improves hormonal response, and conditions the cardiovascular and circulatory system. Old cells wither and new ones take their place fast, which also means more health benefits. A good diet regimen should also be part of the game plan.