Too many people fall into the all-or-none fitness mentality. If don’t have enough time or energy for a full workout do something less strenuous. Half an effort is much better than no effort at all. In fact, there’s a law of diminishing returns when it comes to exercise. A lot of the health, brain and mood benefits are garnered from moderate exercise at a moderate effort. The Harvard Medical School says, “Exercise is the best-kept secret in preventative medicine.” It provides protection against heart attack, stroke, high blood pressure, diabetes, obesity, osteoporosis and fractures, depression, dementia and even certain forms of cancer. But it doesn’t need to be long or hard. And there are even times when giving in to your laziness can actually be good for you.