When reaching hard enough, will you feel pulling in your hamstrings? It’s likely. Tendons and muscles (unlike other structures) will usually allow you to eek out another centimeter in pursuit of your toes, which you’ll feel. But “feeling it there” does NOT mean that is necessarily the limiting factor. To touch your toes you’ll need sufficient hip mobility, low back mobility, and sciatic nerve length for starters, not to mention mid back mobility and even arm length! Whereas so many (I want to say most) fitness professionals and medical clinicians alike make assumptions such as this, I critically assess why someone cannot do something. We move your body in various ways repeatedly to understand the source of a complaint or functional deficit. And by the way: it’s usually not your hamstrings.
Many, many bodily joints and tissues need to function well to be able to fully bend forward. Poor hamstrings, though … they always get blamed!
To regain forward bending ability, I hardly ever loosen patients’ hamstrings. However, say a patient did simply need looser hamstrings - then clinical care is hardly needed. (Stretching is not rocket science!) With consistent home stretching, hamstring length better consistently improve.
In almost all cases, forward bending is limited because lumbar structures are moving improperly. Usually it’s that the joints themselves are misaligned. In other cases, compressed/adhered/trapped nerves create nerve tension that limits this movement (with or without contemporary joint malalignment).
Forward bending (lumbar flexion) is usually restored once we get the patients’ lumbar structures moving properly again. Importantly, using forward bending to achieve this is beneficial in only a small group of patients. More commonly I utilize lumbar extension or sidegliding.
So why do people say they “feel it” in their hamstrings? It’s either that they’re actually feeling the sciatic nerve(s) pull or that, in attempting to bend further, their body eeeks out more motion in the only structures it can – muscles and tendons – so they “feel it” there. Expert mechanical clinicians know better. --Laura
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