Sciatica from Sitting: What Helps, and What Makes It Worse

A line of pain runs from the buttock down the back of the leg. Sitting makes it worse. Some days it is an ache, other days it is sharp, and occasionally the foot feels slightly numb.

Before anything else: sciatica is a symptom, not a diagnosis. It describes irritation of the sciatic nerve — and several different things can cause that, some of which need medical assessment rather than exercises. This article is about the common mechanical version and about knowing which one you have.

Written by Velion Physique. In the fitness industry since 2019, with licences in medical fitness training and back training. This is general information, not medical advice.

Read this part first

See a doctor promptly — the same day for the first two — if you have:

• Numbness in the groin, genitals or inner thighs, or any change in bladder or bowel control
• Weakness in the leg or foot — a foot that drags, difficulty pushing off, or the leg giving way
• Symptoms in both legs at once
• Pain following a fall, accident or impact
• Fever, unexplained weight loss, or a history of cancer alongside the pain
• Severe pain that does not ease in any position, or that consistently wakes you
• Symptoms steadily worsening over weeks rather than fluctuating

The first two on that list are urgent, not "mention it at your next appointment". Everything below assumes none of them apply. A trainer licence is not a medical qualification, and sciatica is one of the clearest places where that distinction matters.

What is actually happening

The sciatic nerve is the largest in the body. It runs from the lower spine, through the buttock, down the back of the thigh and into the lower leg. Irritation anywhere along that path produces symptoms along its whole length — which is why the pain is felt in the leg even though the cause is usually higher up.

Two common mechanical sources:

At the spine. A disc or narrowing in the lower back irritating the nerve root. Typically worse with sitting, bending forward and coughing.

In the buttock. Muscles in the deep hip — the piriformis among them — tightening around the nerve. Typically worse after sitting on hard surfaces and with prolonged driving.

Both are aggravated by the same thing: sustained sitting. Which is why office workers and drivers make up such a large share of cases.

What generally helps

1. Stop sitting still for long periods

Get up every 20 to 30 minutes — more often than for ordinary back discomfort. Sitting increases pressure on lumbar discs and compresses the deep hip muscles at the same time. This one change often does more than everything below combined.

2. Keep moving, gently

Extended bed rest makes mechanical sciatica worse rather than better. Walking, within tolerance, is usually one of the most useful things available. Short and frequent beats long and occasional.

3. Nerve gliding

Sit upright, slowly straighten one knee while pulling the toes towards you, then lower it as you point the toes away. 10 slow repetitions each side.

The aim is gentle movement of the nerve within its sheath — not a stretch. If it reproduces sharp pain, stop. This should feel mild.

4. Address the deep hip

Figure-four stretch: lying on your back, ankle across the opposite knee, draw the supporting thigh towards you. 30 seconds each side, gently.

Useful when the source is in the buttock. Less so when it is at the spine — and forcing it can aggravate things, which is why gently is not a throwaway word here.

5. Build support

Glute bridges and dead bugs, as in the lower back article. Once symptoms are settling, building glute and deep core strength is what reduces the chance of it returning. Strength work is for the recovery phase, not the acute one.

What to avoid while it is irritable

• Aggressive hamstring stretching — it feels like the right instinct and frequently pulls directly on an already irritated nerve
• Loaded forward bending: deadlifts, bent-over rows, toe touches
• Sit-ups and crunches
• Long drives or flights without breaks
• Prolonged bed rest

Common questions

How long does it take?

Most mechanical sciatica improves substantially within four to six weeks. Slow improvement is still improvement. No change after six weeks, or any worsening, means getting it assessed.

Heat or ice?

Whichever gives you relief. Neither changes the underlying cause — both are comfort measures, and that is fine.

Is it a slipped disc?

Sometimes, but not necessarily — and imaging findings correlate poorly with symptoms. Plenty of people have disc changes on a scan and no pain at all. That question belongs with a doctor rather than a search engine.

Should I stop training?

Usually you modify rather than stop. Avoid loaded forward bending while it is irritable; walking, upper body work and gentle mobility generally remain fine.

The short version

Sciatica is a symptom with several possible causes. Rule out the red flags at the top of this page first. For the common mechanical version: interrupt sitting every 20 to 30 minutes, keep walking, use gentle nerve glides rather than hard stretching, go carefully with the deep hip, and build glute and core strength once things settle. Avoid aggressive hamstring stretching — it is the most common self-inflicted setback.

The structured version: Relieve Sciatic Tension & Move Better is a daily routine. Since the lower back and hips are almost always involved, the Lower Back Routine and Hip Mobility routine are the companions, and the Mobility Bundle covers five areas together.

Everything is in Mobility & Pain Relief.