Does Stretching Help Sciatica?

Here's the thing with sciatica: somehow the sciatic nerve (or its nerve roots) has managed to become irritated. Let's say that you have a bulging disc and the compressed nerve root is generating radiating pain down your right leg. This means that the nerve is physically obstructed and cannot glide freely. It's a weird thought, but nerves actually do slide and move depending on the position we find ourselves in.

So the painful nerve is partially trapped and can't glide freely. And because of that, certain positions pull uncomfortably on the nerve and elicit pain, weakness and numbness. You can naturally see where this discussion is going - are there common stretches that should be avoided if you have sciatica? Let's dig into it.

Why the popular stretches can feel good initially but often disappoint

It's mechanical (big surprise coming from a biomechanist, I know). Your sciatic nerve runs from your lower back, through your glutes, and down the backs of your legs. Classic sciatica stretches like hamstring reaches, the figure-4 (piriformis stretch), and toe touches all put strain on the sciatic nerve, which means they load a nerve that is already irritated.

There is a short-term effect that fools people. Pulling on the nerve can briefly dial down how sensitive it feels, so you get a window of relief. A stretch can also feel good initially because it reduces muscle tension in a tight area. But then, over the next few hours, you might notice an uptick in the radiating pain down your leg(s). If your sciatica keeps circling back after every stretching session, this could be the reason.

So how can you know which lower body stretches are sciatica-safe and which are not? Well, let me illustrate this for you: the sciatic nerve is fed by nerve roots that exit our lumbar and sacral regions of the spine. Those nerve roots connect to the spinal cord, which means that, laid end to end, these nerves run basically the entire length of our bodies. That naturally leads to a number of postures that can strain or directly compress the nerve. Starting at the top and working our way down the body:

1. Cervical flexion (chin to the chest) - pulls on the spinal cord, and by extension, the exiting nerve roots.
2. Spinal flexion - flexion pushes the nucleus of our discs backwards and bulges our discs, putting pressure on the nearby nerves.
3. Hip flexion - think bringing your knees towards your chest, or vice versa. This action pulls the nerve taut around your hips and glutes as you move.
4. Knee extension - that same nerve distribution is still connected beyond the knee. Combining knee extension with hip flexion adds further strain to the nerve.
5. Dorsiflexion - the action of pointing your toes/foot up.

Funny enough, the classic seated hamstring stretch typically involves all of these. Yikes. Probably worth avoiding if you have active sciatica. I personally struggled with this concept for a long time. I now very seldom have flare-ups and my general sciatica severity sits between 0 and 1 out of 10 on a pain scale. For some reason, I still feel tempted to stretch my hamstrings and glutes with seated hamstring and figure-4 stretches. Yet, almost every time that I do, I notice a small but recognizable increase in numbness in my right glute. Old habits die hard, I guess. But don't worry, there's hope and some alternatives we'll go through.

What can help instead

There's a real difference between gliding a nerve and stretching it. The glide moves it a lot while barely straining it, whereas the stretch strains it hard and barely moves it [Coppieters & Butler, 2007]. So gentle nerve movement does earn its place. When you pool the research, nerve gliding tends to reduce pain and disability in sciatica, though the evidence is modest and it works best as one piece of a broader plan rather than a fix on its own [Lin et al., 2023]. The key word is gentle. Never force it into pain. So how does this all work? Well, the concept is simple. If we take a look back at the list of motions I gave that put strain on the sciatic nerve, we can carefully combine moving in and out of some of these positions to gently glide the nerve. The general idea is this: we want to apply some tension at one end of the body while providing laxity at the other, giving the nerve room to glide more freely. This can look like extending the neck while extending the knee, and then flexing the knee and neck together. With a straightened leg, you can also extend your neck while simultaneously dorsiflexing your foot with a partially extended knee. I know that sounds complicated, so here are some pictures.

Do one set of 10-15 slow reps while seated, once or twice a day. If you feel pain, stop. Try again with less knee extension once your pain subsides. If it still hurts, discontinue. This doesn't feel good for everyone, but there's enough data to point to a potential beneficial effect. There's still more that you can do. In general, start by calming the nerve, then rebuild strength around it. Two things quietly keep sciatica going: rounding your lower back and long bouts of sitting, which both put strain on the nerve, so reducing those is step zero. Other than nerve sliders, here are a couple of other things to try:

1. Prone lying. Lie face-down, propped up on your forearms if that feels okay, for 2 to 5 minutes. This gently unloads the back of the disc.
2. Walking. Start with 10 to 15 minutes, twice a day, and add about 5 minutes each week as you tolerate it.
3. Hold off on aggressive stretching. Park the deep hamstring, glute and figure-4 stretches until your leg symptoms settle down (and your body may never like these stretches - mine still doesn't). If a muscle genuinely feels tight in the meantime, foam rolling is a gentler option — it can take some tension out of the muscles without pulling the nerve taut the way a deep stretch does.
   1. This is my favourite way to release glute and hamstring tension without flaring my sciatica.

A general cue to know if what you're doing is working is to pay attention to the location of your pain. If you notice it centralizing (the pain is no longer down your leg and is instead moving up toward your glute and spine), then you're on the right track.

As always, have a great weekend.

Best,

Mitch

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References

[1] Coppieters & Butler, 2007. Manual Therapy. doi.org/10.1016/j.math.2006.12.008

[2] Lin et al., 2023. Life (Basel). doi.org/10.3390/life13122255

Disclaimer: this content is educational only and does not constitute medical advice. See a practitioner if you suspect serious spinal trauma from a fall or accident, or if you experience any of the following red flag symptoms: loss of bowel or bladder control, numbness in the groin or saddle area, rapidly worsening leg weakness, back pain with fever or feeling generally unwell, or unexplained weight loss with back pain.