Eating a healthier diet, getting more exercise and doing more sports – lots of people recommit themselves to these goals over and over. But one's baser instincts are often stronger and invincible. On the couch in the evening, you take stock of the day only to admit that you have failed to rally once again. And yet, physical fitness is now considered a remedy for many illnesses. Particularly for older people, daily exercise is important – not only during rehabilitation following major surgery but also for one's general sense of physical well-being.