Dana Santas, known as the “Mobility Maker,” is a certified strength and conditioning specialist and mind-body coach in professional sports. She is also the author of “Practical Solutions for Back Pain ...

View post: Running Legend and Founder of the Run-Walk-Run Method Dies at 80. Here's How 'Jeffing' Helps Runners of All Experience Levels “The reason to stretch your hamstrings is to keep your hips and ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. For strong, powerful ...