Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...

Have you ever observed a baby in action, figuring out how to crawl or dropping into a squat with perfect form? It’s one of the best ways to understand primal movement, a type of workout based on ...

In 2010, the Animal Flow workout program introduced the world to quadrupedal movement training (QMT), a ground-based style of fitness that draws inspiration from animal movements. While QMT, or primal ...