Natalia Perez-Segnini is a NASM-certified personal trainer, a yoga instructor, a breathwork practitioner and a trauma-informed specialist. As a head coach at Tone House—a premier athletic-based ...

Tight hamstrings are a common complaint among my personal training clients. I understand the struggle firsthand, as I also have to stretch this muscle regularly. But according to Dr Neal Scibelli, a ...

Flexibility test at 60, guided by a certified trainer, using 3 seated movements to assess hips, spine, and hamstrings.

Beth Skwarecki is Lifehacker’s Senior Health Editor and has been writing about health, fitness, and science here since 2015. Beth was the recipient of the 2017 Carnegie Science Award in science ...

If your hamstrings feel tighter than a pair of jeans fresh from the dryer, you’re not alone. Whether you spend your days sitting at a desk, running long miles, or crushing heavy squats, tight ...