Looking for a fountain of youth? You may need to search no further than your sneakers. Exercise, particularly high-intensity interval training, encourages your cells to make more proteins to feed ...

DEAR DOCTOR K: What is interval training? What are the benefits of exercising this way? DEAR READER: Interval training simply means alternating between short bursts of intense exercise and brief ...

In the fitness world, the word “miracle” gets thrown around like a two-pound dumbbell. But when it comes to high-intensity interval training (HIIT), a very short workout, the benefits you’ve heard ...

Walking has long been praised as one of the safest and most accessible forms of exercise, but now a technique called Japanese Walking, also known as Interval Walking Training (IWT), is proving to ...

HIIT may offer the same health benefits as regular exercise in less time and help reduce body fat, heart rate, and blood pressure. It may even help improve blood sugar levels and insulin sensitivity.

People who complain they have no time to exercise may soon need another excuse. Some experts say intense exercise sessions could help people squeeze an entire week's workout into less than an hour.

Q: I swim regularly. I would like to step up the intensity of my exercise, but I am limited because of arthritis in my hips and knees. What can I do in the pool to make it more challenging? A: I ...

[UPDATE: Commenter Christian Finn points out that the 200 calories mentioned in the Colorado State study refers to the TOTAL calories burned by the workout, not just the post-exercise calories. So in ...