Forcing tight hamstrings open can cause a serious injury years later. Movement teacher Ido Portal explains why attacking the problem head-on is dangerous: [▻

Forcing tight hamstrings open can cause a serious injury years later. Movement teacher Ido Portal explains why attacking the problem head-on is dangerous: [▻](https://video.twimg.com/amplify_video/2080043923888599040/vid/avc1/3840x2160/JYsDKMlJ079ZcLVe.mp4)