Can I Train With A Bad Knee, Shoulder Or Back? Training Around An Old Injury

You did something to your knee, shoulder or back a few years ago, and since then you have quietly built your life around it. You avoid certain movements, you brace yourself on the stairs, and every time you think about starting training properly you wonder whether you would just make it worse.

It is one of the most common reasons people put off starting, and it is a reasonable worry rather than an excuse. Before I go any further, the important part: I am a personal trainer, not a physiotherapist or a doctor. I do not diagnose injuries and I do not do rehab. If your injury has never been properly assessed, or it flared up recently, or it is getting worse, that is a conversation for your GP or a physio first. What follows is about how training tends to work alongside a body that has some history.

First, know what you are actually dealing with

A surprising number of people have been carrying a bad knee for a decade without anyone ever looking at it. They rolled it playing football in 2014, it swelled up, it settled down over a few weeks, and they have avoided lunges ever since. There is no diagnosis, just a memory and a habit.

That matters, because bad knee could mean a dozen different things, and they do not all need the same approach. Getting an actual assessment from a physiotherapist changes the situation from a vague no go area into a specific set of things to build and a specific set of things to be careful with, at least for now.

If your injury is recent, if it is getting worse, if the joint locks, gives way or swells, if there is numbness or weakness, or if the pain is severe, please see a professional rather than a trainer. Get seen promptly. That is not me passing the buck, it is genuinely the right order to do things in.

Avoiding everything usually does not work long term

The instinct after an injury is to protect it. That is sensible in the early days. The problem is when the protection becomes permanent, because the body responds to what you ask of it and to what you stop asking of it.

If a knee has been kept away from anything demanding for five years, the muscles around it have generally lost some size and strength, the joint has lost some of its tolerance for load, and the confidence has gone too. So the next time real life asks something of it, carrying a sofa, running for a train, a week of skiing, it is asked to do a lot from a low base. Then it complains, and that reinforces the belief that the knee is done for.

This is the loop I see most often, and the way out of it is not heroic. It is gradual, boring, well judged loading over months, ideally with someone watching how you respond. Tissues adapt to load. That is the whole basis of training. An old injury does not change the principle, it changes the starting point and the rate.

None of that means pain is something to push through. It is not. Sharp pain, pain that lingers into the next day and beyond, or pain that keeps escalating session to session is information, and the correct response is to back off and speak to a professional.

What a good coach actually does with an old injury

In practice, working around an injury is less dramatic than people imagine. It is a series of small, specific decisions rather than a completely separate programme.

• Change the movement, not the goal. If deep squatting bothers a knee, we might use a range you tolerate well, a different foot position, a split stance, or a machine based version. The goal of strong legs does not change. The route does.
• Start well below what you can do. The first few weeks are deliberately easy. It gives us a baseline and it means that when something does niggle, we know what caused it rather than guessing between six new things.
• Change one variable at a time. More weight or more reps or more range, not all three in the same week. Slower progress is easier to steer.
• Build the things around the joint. Shoulders often benefit from work on the upper back and the muscles that control the shoulder blade. Knees often benefit from work on the hips and the muscles down the back of the leg. Backs often benefit from hips and upper back moving better.
• Use the days after the session as data. How you feel 24 and 48 hours later tells us more than how the set felt. I ask every session, and it drives what we do next.

The other thing a coach does, which is easy to underestimate, is stop you doing too much on a good day. Most flare ups I hear about happen on the week someone felt great and doubled everything. If you want to see how the sessions are structured week to week, I have set out how the coaching works in more detail.

The difference between training and rehab

Worth being clear about, because the two get blurred. Rehab is the process of treating and restoring an injured area, and it belongs to physiotherapists and doctors. It involves diagnosis, hands on assessment, and specific prescription for a specific problem.

Training is building general strength, fitness and capacity in a body that also happens to have a history. That is my job. The two work well together, and the best outcomes I see are when a client is doing what their physio has told them to do and I am building everything else around it without getting in the way.

If you are currently under a physio, tell me and I will work to their guidance. If they have given you specific exercises, those take priority over anything I would otherwise choose. If something comes up in a session that looks like it needs assessing, I will say so and send you back to them. I would rather lose a few sessions than push someone into a problem.

What to tell your trainer, in as much detail as you can

The consultation is where most of this gets sorted, and the more specific you are the better the plan. Vague information leads to vague caution, which usually means you get under trained. Useful things to bring:

• What happened, roughly when, and what you were doing at the time.
• Whether anyone has ever assessed it, and what they said. Scan results, a diagnosis, a surgery, a course of physio.
• The specific movements that reliably aggravate it. Not just running hurts, but downhill hurts after about ten minutes and the following morning is stiff.
• The movements you have been avoiding out of fear rather than because they actually hurt. This is often a longer list than the first one, and it is where a lot of the easy wins are.
• What it is like on a good day and a bad day, and what tends to trigger a bad day.
• Anything you are still taking for it, and anything you are waiting on, like an appointment or a scan.
• What you actually want to be able to do again. Get on the floor with the grandchildren, carry the shopping without thinking, walk a hilly route, ski without dreading it.

That last one matters more than people expect. Working around an injury with no destination in mind turns into permanent caution. Having something concrete to build towards gives both of us a way to judge whether the plan is doing anything.

Expect it to be uneven

Progress with an old injury is rarely a straight line. There will be weeks where something grumbles for no obvious reason, and weeks where you do more than expected and feel fine. Sleep, stress, a long drive and a heavy week at work all move the needle.

The mistake is treating every grumble as proof that training is wrong. Usually it means one variable moved too fast. If it does not settle within a few days, or it keeps returning in the same way, get it looked at again rather than pressing on.

The measure I care about over months is whether the bad days are getting less frequent, and whether the list of things you avoid is getting shorter.

It is worth doing something, even if it is not everything

You may never love running again. There may be a movement that is not worth the bother for you, and that is a perfectly acceptable outcome. But that is a long way from the assumption plenty of people make, which is that a dodgy shoulder means training is off the table altogether.

In my experience most people with a history can do far more than they think, provided the starting point is honest and the progression is patient. The limiting factor is usually not the joint. It is that nobody ever showed them a sensible way in.

Where to start

I train people one to one from a private setup in Cuckfield, and clients travel in from Haywards Heath, around five minutes by car, and from Balcombe, roughly ten. Working around old injuries is a normal part of the job rather than an awkward exception.

Everyone starts with a free, no obligation consultation. We go through a health questionnaire, talk properly about your history, and do a movement screen so I can see how you actually move rather than relying on a description. If I think you need a physio or your GP before you need me, I will tell you plainly. Get in touch and tell me what happened and what you have been avoiding since.