Do your hamstrings feel like they're made of concrete? 🧱 This is an assisted PNF hamstring stretch. Your partner gently raises your leg to its limit, you contract the hamstring against their hand for 5 seconds, then relax as they guide your leg into a deeper stretch. Send this to someone with chronic hamstring tightness. . #hamstringstretch #assistedstretching #pnfstretching #flexibilitytraining