High-intensity interval training is one of the biggest trends in fitness, but it has always seemed a bit scary to me. To a mere mortal with achy knees and an aging body, even the acronym — HIIT — ...

Forbes contributors publish independent expert analyses and insights. AI researcher working with the UN and others to drive social change. Oct 20, 2025, 05:19am EDT A humorous animated brain character ...

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 ...