You’ve had enough time away from the gym and now you’re ready to get back at it. The excuses are gone, you’ve started eating clean and now—it’s time to get your workout routine locked down. But, ...

How do you quantify fitness? Many of us go to the gym to build muscle, boost our mood and improve our quality of life as we age. But it’s hard to compare relative strength between individuals, and ...

We all know that interval training can improve various fitness markers, including VO2 max. But it’s not always easy to work out the exact impact of these improvements on your running. A new study ...