LPT: if you feel the back of your knee when stretching your hamstring, you’re not stretching your hamstring
LPT: if you feel the back of your knee when stretching your hamstring, you're not stretching your hamstring This may seem obvious when you read it but it happened to me, but that's because I'm not very bright. If this is your case, you need to slightly bend your knee until you feel the stretch in the hamstring. You should also keep your lower back straight. That tingling sensation is actually the sciatic nerve being stretched (which you shouldn't). I...