Fitness

Last year, Ashley and a large team of scientists conducted an elaborate experiment on the effects of exercise on the mammalian body. In one test, Ashley put rats on tiny treadmills, worked them out for weeks, and cut into them to investigate how their organs and vessels responded to the workout compared to a control group of more sedentary rodents.1 The results were spectacular. Exercise transformed just about every tissue and molecular system that Ashley and his co-authors studied—not just the muscles and heart, but also the liver, adrenal glands, fat, and immune system ...

Like Herman below, I exercise daily. A one-hour brisk walk in the early morning on weekdays before sitting at the desk, and four weekly sessions of bodyweight strength training (known as calisthenics nowadays). If it’s going to be a scorching hot day, I’ll immediately follow the walk with the training, take a shower, have breakfast, and then start work. In the cooler season, I’ll stop working at noon and exercise before lunch instead. During the weekend, I often take long walks, go hiking, and rest. ...