Slow Down While Lifting Weights

"By slowing your movements down, it turns your weight-training session into high-intensity exercise. The super-slow movement allows your muscle, at the microscopic level, to access the maximum number of cross-bridges between the protein filaments that produce movement in the muscle.

This is a beneficial and safe way to incorporate high-intensity exercise into your workouts if you're older and have trouble getting around. You only need about 12 to 15 minutes of super-slow strength training once a week to achieve the same human growth hormone (HGH) production as you would from 20 minutes of Peak Fitness sprints, which is why fitness experts like Dr. Doug McGuff are such avid proponents of this technique.

The fact that super-slow weight training gives you an excellent boost in human growth hormone (HGH), otherwise known as the "fitness hormone," is another reason why it's so beneficial if you're older. As you reach your 30s and beyond, you enter what's called "somatopause," when your levels of HGH begin to drop off quite dramatically. This is part of what drives your aging process. According to Dr. McGuff, there's also a strong correlation between somatopause and age-related sarcopenia. HGH is needed to sustain your fast-twitch muscle fibers, which produce a lot of power. It's also needed to stimulate those muscles.

"What seems to be evident is that a high-intensity exercise stimulus is what triggers the body to make an adaptive response to hold on to muscle," Dr. McGuff says. "We have to remember that muscle is a very metabolically expensive tissue… If you become sedentary and send your body a signal that this tissue is not being used, then that tissue is metabolically expensive. The adaptation is to deconstruct that tissue…"

People of all ages can benefit from super-slow weight training, but this is definitely a method to consider if you're middle-aged or older. I recommend using four or five basic compound movements for your super-slow (high intensity) exercise set. Compound movements are movements that require the coordination of several muscle groups—for example, squats, chest presses and compound rows. Here is my version of the technique."

- Dr. Mercola, Never Too Old to Start Weight Training