Heading out the door? Read this article on the new Outside+ app available now on iOS devices for members! Download the app.

Roll for 1-2 minutes per side; hold 30 seconds in tight areas.

Get to the bottom of your “tight” hamstrings with Erin Calderone, MS, NASM-CPT, CES, BCS, AFAA-GFI, in her Ask the Professor column.