Run 30 seconds hard at your VO₂ max pace. Follow that with 30 seconds of very easy running (with the short interval, your ...

Interval training is great for boosting cardiovascular endurance and promoting overall fitness. Our fitness expert, Judd NeSmith, NASM-CPT, PES and founder of Serious Fitness, explains interval ...

High-intensity interval training, or HIIT, is a great way to torch calories, boost your metabolism and get a great workout in a shorter amount of time. And if you're a fan of hopping on the treadmill ...

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High-intensity interval training, or HIIT, is a great way to get in a fast, effective workout. This quick routine is helpful if you are short on time, and it allows you to test the waters of HIIT.

Good news: starting your running journey doesn't have to require diving in head-first and sprinting for 30 minutes straight. If you’ve never been much of a runner (or you’re starting to get back into ...