Sign up for the Well newsletter, for Times subscribers only. Essential news and guidance to live your healthiest life. These days, more and more of us have to worry about our blood sugar. Some 38 million Americans have diabetes, and more than two times that number have pre-diabetes. Many millions more have some form of insulin resistance, which can make you tired, irritable and even dizzy. And all of these conditions become more common as we age. The good news is that exercise can help. It’s...

The squat is a full-body move that is sometimes called “the king of all exercises.” It is essential for everyday movements, like getting out of a car or up off the floor. Practicing squats regularly strengthens your legs, glutes and core, and improves your stability. What You’ll Need Squats can be done with just your body weight. To increase the difficulty, hold a dumbbell or a kettlebell at your chest. How to Start Stand tall, with your feet shoulder-width apart and your toes pointing...