If your back stiffens after a day at the desk or your knees complain on the stairs, the honest answer is that, for many people, carefully adapted training can be more helpful than avoiding exercise altogether. That holds as long as the pain is a familiar, ongoing niggle rather than something new, severe or getting worse, and your GP or physiotherapist is happy for you to exercise. This is the work we do as a personal trainer for bad back or knee pain in Blackheath: choosing positions, ranges and loads that feel manageable, coaching every rep, and progressing slowly.
What we don't do is diagnose or treat. KD Personal Training is a coaching studio in Blackheath village, not a clinic, and we work alongside the advice of your GP or physiotherapist, never instead of it. For many people a good starting point is our Movement & Pain Consultation, a one-off private session that looks at how you move and ends with a personalised written programme.
When to see your GP or physiotherapist first
Training around a niggle only makes sense once anything more serious has been ruled out. Being under treatment doesn't automatically rule training out: we start from what your clinician has cleared you to do, so bring any guidance you've been given.
Speak to your GP or physiotherapist before you start if any of these apply:
- Pain that came on suddenly, or is severe
- Pain that is getting steadily worse
- Pain after a fall, an accident or a knock
- Numbness, tingling, or pain that travels down your leg
- Swelling around the knee or another joint
- You are under active treatment for the problem
Should you exercise with knee pain or a stiff back?
Rest feels like the safe choice, and with a new injury your GP or physiotherapist's advice comes first. With a long-standing niggle, though, doing less can work against you. For many people, the muscles around a stiff back or a sore knee gradually lose strength, movement settles into a smaller range, and stairs, shopping bags and getting up from the floor start to feel harder.
The principle underneath sensible training is load management: muscles, tendons and joints generally adapt to what they are regularly asked to do, provided the dose rises gradually. If your physiotherapist has given you guidance on how much discomfort is acceptable during exercise, we work within it, and any sharp, unfamiliar or escalating pain is a signal to stop and check with them. The aim is never to push through pain; it's to find a level your body tolerates well, then nudge it up.
How strength, mobility and control work may help
Weakness, tightness, reduced mobility and the way you move can sometimes contribute to pain. They aren't always the cause, but they are the parts a coach can work on. For knees, that often means building strength in the thighs and hips so the joint may feel better supported on stairs and slopes. For backs, it tends to mean strength through the trunk and hips, plus mobility in the hips and upper back, so bending, lifting and turning may feel more evenly shared across the body.
Control is the third piece: moving slowly and steadily through a range rather than bracing or rushing. So can a personal trainer help with lower back pain or sore knees? A good one may help you move more comfortably and confidently, but through exercise rather than treatment, and without promises about outcomes.
What adapted training looks like in practice
People often ask which exercises are safe with a bad knee or back. Very few exercises are safe or unsafe for everyone; what matters is the version, the range and the load. The squat rack, smith machine and cable pulley system in our studio make it easy to adjust angles, add support and guide a movement, and the free weights, mats and mobility kit cover the rest. If your back is stiffer one week, the session changes with it.
In practice, adapted training means:
- Positions that suit you: a split squat holding the rack for balance, or a cable row instead of a bent-over row
- Ranges you can control: squatting to a comfortable depth, then extending it gradually over the weeks
- Loads below your limit, so there is room to adapt
- Slow, controlled reps, with your coach watching each one
- Progress at your pace: heavier or deeper only when you're ready, and scaled back when a week is harder
Choosing a personal trainer for bad back or knee pain in Blackheath
Whoever you train with, look for someone who asks about your history and your clinician's advice before you lift anything, adapts exercises rather than telling you to push through, and is honest about their limits. Karolina, our founder and head coach, is a degree-qualified personal trainer with over 10 years' experience helping Blackheath clients, and if we think you need clinical input before training, we'll say so.
Modified exercises can feel awkward in a busy gym, where it's tempting to copy the person next to you. Our private studio in Blackheath village is two minutes' walk from the station: one client, one coach, nobody watching. Technique is corrected in real time, and loads are matched to how you're moving that day.
Personal trainer or physio: which do I need?
If you want a diagnosis, or the problem is new, severe or changing, start with your GP or a physiotherapist. They assess and treat; we don't. Where we fit is the training side, alongside their advice or once they've discharged you.
At KD there are two routes. Sport rehabilitation training is ongoing, progressive training after an injury, built from what your clinician has cleared you to do; our guide to returning to exercise after an injury explains that process. The Movement & Pain Consultation suits the more general picture: stiffness, restriction or discomfort that has crept in over time without one clear injury behind it.
Start with a Movement & Pain Consultation
The consultation is a one-off private session of up to two hours, priced at £300. It covers a detailed discussion of your discomfort, lifestyle and goals; posture, mobility, strength and movement screening; coaching through appropriate strength and mobility exercises; and practical guidance for training and everyday movement, followed by a personalised written exercise programme sent after your session.
You can run that programme yourself, or carry it into regular 1-to-1 personal training so it keeps adjusting as you progress. Read what to expect from a Movement & Pain Consultation for a fuller account, or see the consultation details and booking page.
Book a free introductory session
Every new client starts with a free 30-minute introductory session: we'll talk through your back or knees, check how you move and show you the studio, with no pressure and no obligation. Clients join us from Lee, Lewisham, Greenwich and across south-east London, and most reach the village within a quarter of an hour; our find us page has directions. Book your free introductory session and tell us what has been holding you back.