Is interval training only beneficial to younger folks?

Read more in: High-Intensity Workouts May Be Good at Any Age

Abbreviated, intense workouts may help people of any age become healthier, a new study of old mice that ran on treadmills suggests. Although the experiment involved rodents, not humans, the study found that old mice can tolerate high-intensity interval training and rapidly gain fitness and strength, even if they start off frail and exercise for only a few minutes a week.