You had a sore calf six weeks ago, rested it for a week, and mostly figured it was done. Now your knee is aching on every run and you have no idea what happened. The calf didn't spread anywhere. Your body changed how you move to protect the original injury, and that altered movement has been quietly loading your knee in ways it was never designed to handle. Most runners dealing with a second injury are still carrying an unresolved first one.
This pattern has a name: antalgic gait. It accounts for a huge number of the "mystery" injuries that appear weeks after the original problem seemed to clear up, and it's worth understanding if you keep ending up hurt.
What is antalgic gait?
The word comes from the Greek for "against pain." When your nervous system detects a problem in your leg, it automatically shortens the time your foot spends on the ground on that side, reduces how hard you push off, and shifts your weight away from the sore spot. You don't decide to do this — it just happens, and most people have no idea they're doing it unless someone films them from behind on a treadmill.
In walking it looks like a slight limp. In running it's subtler: a shorter stride on one side, a small hip hike, a trunk lean of maybe a centimetre or two. Your Garmin won't catch it. Your physio might, on a good day, if you describe the right symptoms. But the forces it creates are real and they go somewhere, because forces in a moving body always do.
How it causes injuries up the chain
Your body moves as a connected system, where every joint from your foot to your lower back depends on what's happening below it. When the bottom of the chain changes, everything above it has to adjust, and those adjustments add load to structures that weren't built to carry it.
A calf strain that alters how you push off changes the angle at which your knee loads on every stride. A plantar fasciitis that stops your big toe from extending properly forces your hip to rotate outward to get clearance, which tightens the hip flexor on that side and drops the pelvis on the other. A tight Achilles that limits ankle range of motion shifts the bending work to your knee and hip, which absorb it well for a while and then start to complain.
These compensations accumulate. The hip abductors on your unaffected side work harder than normal to keep you balanced and, over enough miles, they fatigue and strain. The IT band on one side gets repeatedly shortened by the hip hike. The lumbar spine takes rotational load it doesn't normally handle, because the pelvis is tilting asymmetrically with every step. None of this is dramatic on a single run, but across fifty runs it adds up to a proper injury.
Some patterns come up again and again in runners: calf strain followed by patellofemoral knee pain. Plantar fasciitis on one side alongside hip flexor tightness on the other. Achilles issues on the right with lower back pain on the left. The body is fairly predictable about this, once you understand how the loading travels.
Why the usual fixes keep you stuck
Rest is the first thing most runners try, and it does help with the acute pain. The problem is that it doesn't change the movement pattern, so when you go back out, the original injury is still slightly restricted, the nervous system still protects it, and the compensation starts again from where it left off.
Treating the secondary injury in isolation — getting physio for the knee, doing hip strengthening for the hip — addresses the damage the compensation has already caused, which is useful, but doesn't stop more damage arriving if the original problem isn't fully resolved. You end up in a cycle of treating consequences while the cause keeps running.
Foam rolling and stretching tend to target whatever is tight and sore, which is almost always the compensating muscle rather than the source. Releasing a tight hip flexor doesn't fix the Achilles that made it tight in the first place. The relief is real, the root cause isn't touched, and the tightness is back within a week.
The cycle breaks when the original injury gets proper treatment: genuine, sustained work through the affected tissue that restores full range of motion and gives the nervous system a reason to stop guarding it. That's a harder ask than it sounds, not because it requires anything fancy, but because most home recovery tools aren't designed to work on the specific structures that start these chains in runners.
What actually changes the outcome
For most runners, the chain starts in the lower leg: calf, Achilles, plantar fascia, or ankle. Restoring proper range of motion in those tissues reduces the nervous system's reason to guard them, which gradually brings the gait back toward normal, which reduces the secondary load piling up at the knee, hip, and back. The secondary injuries don't need separate fixing — they follow the primary one back to health, if you fix the primary one properly.
I built the Yoback because I needed something that could work on all of these areas with one tool. A single piece applied under the calf with the foot elevated gives a loaded Achilles and plantar fascia stretch that actually reaches the right tissue, because the curved shape follows the arc of the calf muscle rather than creating a hard point of pressure like a foam roller edge. The modular design means you can use just the piece relevant to where you are in the chain — calf and Achilles work when the original injury is in the lower leg, then lower back decompression once the compensation has worked its way up there.
One customer had plantar fasciitis for eight months. She came back to say it cleared within days of consistent calf and fascia work with the Yoback Lite. Eight months on a step and a foam roller, days with the right shape applying the right load. What you use matters.
Used in this article
Yoback — £114.99
A modular recovery tool that works across the full kinetic chain, from calf and Achilles to lower back, so you can address both the original injury and what it did to everything above it.
See the Yoback →How to use it
- Start at the original injury. If it's in the lower leg, place a single Yoback piece under the calf or Achilles with your foot resting on a raised surface, and hold for 2 to 3 minutes per side. You want a sustained, loaded stretch, not sharp pain.
- Once the calf and Achilles feel more mobile, move to the plantar fascia: place the piece under the arch of your foot, stand lightly on it, and let your weight gradually increase over a minute or two. The curved edge does the work, so you don't need to force anything.
- After a week of consistent lower leg work, add the lower back if that's where the compensation has landed. The full wheel shape gives you a controlled thoracic and lumbar extension that decompresses the spine without the risk of overextending on a flat surface.
- Ten minutes a day is enough. Consistency matters far more than duration, and daily short sessions beat three long ones a week, every time.
Getting back to running
The goal isn't just clearing the pain. It's getting the movement pattern back to normal so the secondary injuries stop recurring. That takes some patience, but it's a different kind of patience than waiting for something to heal on its own. You're actively changing the tissue state, and that tends to move faster than rest alone.
The Yoback comes with a 30-day guarantee. If it's not for you, easy return: leave it on your doorstep and we collect, no conversation required. With 280-plus five-star reviews and a return rate of 0.28%, most people keep it, but the guarantee is there either way.
Most runners dealing with a recurring second injury are still carrying the unresolved first one. That's the thing worth checking.
