MEDICAL MINUTE
EXERCISE SNACKING FOR HEALTH AND LONGEVITY
We all enjoy a healthy snack like nuts and fruits or a less nutritious option like chips and sweets between our main meals, but have you ever heard of an exercise snack? Short bouts of exercise add up and can help keep you fit, whether you spend your days at home or in the office. In addition to carving out an hour to go to the gym, you can break off little bits of exercise to do throughout the day—exercise snacks—and reap additional benefits.
Exercise “snacks” grew out of the concept of high-intensity interval training (HIIT) and sprint interval training (SIT), in which you exert yourself for a short period, rest for a short period, and then repeat. These time-efficient workouts are usually done in bouts of about 10 to 25 minutes and have well-established physiological benefits.
Do exercise snacks really make a difference?
Yes, in several ways. In a lab study, researchers had one group of participants do traditional SIT on a stationary bike that consisted of three 20-second sprints separated by two minutes of rest in a single 10-minute session. Then another group of participants did the “exercise snacks” version of the same 20-second bouts separated by several hours, instead of several minutes, throughout the day. Following six weeks of training, the improvements to aerobic fitness were comparable between the SIT and exercise snacks groups. This review article of several studies on exercise snacks showed significant benefits on cardiorespiratory fitness, including decreased total cholesterol, increased oxygen consumption, and overall cardiovascular function.
How long do I need to be active?
It can be as little as 20 seconds to a minute, with the goal of elevating your heart rate. The more snacks you can do during the day the better, but something is better than nothing.
What are some examples of exercise snacks I can do?
Try bodyweight exercises like jumping jacks, push ups, jogging on the spot, lunges or squats. If you’ve got a set of stairs at home, walk up and down at a brisk pace for a minute to get the blood flowing, or go for a brisk walk around the block.