The two restrictions that most often limit runners are hip extension and ankle dorsiflexion — how far the leg goes behind you, and how far the knee travels over the foot. Hamstring flexibility, which is what runners are usually told to work on, is rarely the limiting factor and is sometimes better left alone.
If you take one thing from this: on a rest day, work the front of the hip and the ankle, not the back of the leg.
Why the hip and the ankle
Running is a sequence of controlled falls, and the power comes largely from extending the hip behind you. Sit for eight hours a day and the front of the hip shortens; the hip stops extending as far; the body finds the range somewhere else, usually by arching the lower back. That is the mechanism behind a lot of vague running-related back ache, and it is why hip flexor work is the single highest-return thing most desk-bound runners can do.
The ankle matters for a similar reason. If the knee cannot travel forward over the foot, load has to go somewhere, and it tends to go to the knee or up the chain.
Hamstrings, meanwhile, are often tight in runners because they are working, not because they are short. Aggressively stretching a hamstring that is doing a lot of eccentric work is a good way to irritate it. Length work there should be gentle and it is not the priority.
A rest-day practice
Twenty to thirty minutes, and most of it is not stretching.
Hip flexor and quad length. Half-kneeling shapes, with the emphasis on tucking the pelvis rather than leaning forward — most people get the sensation in the wrong place here, which is a good reason to have someone watch you once.
Ankle work. Knee-over-toe movement with the heel down, slowly, both sides, plus calf length. Two minutes, genuinely useful.
Thoracic rotation. Running is rotational and desk work removes rotation. This shows up as a stiff, blocky-feeling stride more often than people realise.
Glute and single-leg stability. Loaded, not stretched. Standing balance work, single-leg shapes held. Yoga is unusually good at this and it is the part most often skipped.
Gentle hamstring length, last and lightly. Supported, not forced.
Breathing. Five minutes lying down, slow, longer exhale. Recovery is the point of a rest day and this is the only part of the session that directly serves it.
What yoga will not do
It will not make you faster on its own, it is not a substitute for strength work, and it does not prevent injury in any way the evidence supports strongly. Running injuries are mostly load-management problems — too much, too soon, too often — and no amount of mobility work compensates for a training plan that ramps too fast.
What it does reasonably well is keep the ranges you need available, provide single-leg stability work, and give you something to do on a rest day that is not simply not running, which is the part most runners find hardest.
Where a session helps
Two things are hard to self-diagnose: which of the restrictions above you actually have, and whether you are getting the sensation in the place a shape is aimed at. Both are a ten-minute conversation with someone watching you move.
A thirty-minute one-to-one on a rest day is a sensible shape for this — long enough to work on the two things that are actually yours, short enough that it does not become another training session. Sessions are booked one at a time, which matters in a marathon block where the rest days move.
Questions people ask
Should runners stretch their hamstrings?
Less than they are usually told to. Hamstrings in runners are often tight because they are working hard eccentrically rather than because they are short, and aggressive stretching can irritate them. Gentle, supported length work is fine; the higher-return targets are hip extension and ankle range.
Does yoga prevent running injuries?
There is no strong evidence that it does. Most running injuries are load-management problems — increasing volume or intensity too quickly. Mobility and stability work is worth doing on its own terms and does not substitute for sensible training progression.
How often should a runner do yoga?
Once or twice a week on easy or rest days, twenty to thirty minutes, plus a short daily piece if you sit at a desk. More than that tends to compete with running rather than support it.
Should I do yoga before a run?
Not a long or deep practice. A few minutes of movement to open the hips and ankles is useful; holding long passive stretches immediately before running is not, and may briefly reduce power output. Save the longer work for afterwards or for rest days.
A senior yoga teacher at IndieVeda, teaching one-to-one sessions live from India.