On the other hand, when you eat, take time to grind your food. It will not only let you savor the food... As you get older, you're more likely to develop a range of conditions that are rare in younger people such as breast and bowel cancer. Because of this, you'll be invited to have some screening tests and health checks in your middle years. The earlier cancers and other conditions can be detected, the better the chance for a full recovery. There is no reason why you can not workout the entire body every day as long as you vary the intensity. So if you train hard on a Monday then on a Tuesday you can do what is known as a recovery workout where the load/intensity/volume is low but you perhaps work on mobility as well. However, I believe one days rest per week is probably wise regardless of how experienced you are at work outing out. In fact, the more experienced people tend to rest more and train smarter when they do train. Newbies often do the opposite.