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January 21, 2026

Can you do personal training when you have knee pain?

Keeping exercise safe when knees are sore

Exercising with knee pain can feel confusing, frustrating, and sometimes a little scary. You may worry that movement will make things worse, or feel torn between advice that says “rest it” and advice that says “stay active.” The good news is that for many people, the right kind of exercise can actually help knee pain rather than harm it.


First, a reassurance: pain does not always mean damage

Knees are complex joints. Pain can come from many sources—irritated tissues, reduced strength, stiffness, altered movement patterns, or a nervous system that has become more protective over time. Especially in long-standing knee pain, discomfort does not automatically mean you’re causing injury.

This matters, because avoiding movement altogether often leads to weaker muscles, stiffer joints, and more sensitivity over time. Thoughtful, progressive exercise is one of the most reliable ways to improve knee function and reduce pain.

A good physiotherapist can diagnose what’s going on and give you and your personal trainer information about the types of movements to include and avoid. Remember too that your personal trainer can help you to find exercises you can do that don’t involve your knee at all – so even if you do need to give your knee a rest, you can still stay active in other ways.


When exercise helps, and when to be cautious

The first step is to see a physical therapist to help you sort out what’s safe and appropriate for your specific knee.

In most cases, exercise is helpful when:

  • Pain stays at a tolerable level during or after movement
  • Symptoms settle within 24 hours
  • You feel more confident and capable over time

You should pause and seek professional guidance if:

  • Pain is sharp, sudden, or worsening rapidly
  • The knee is giving way, locking, or catching
  • There is significant swelling, redness, or heat
  • Pain followed a recent trauma or fall

The goal is not “no pain” — it’s manageable pain

One common misconception is that exercise must be completely pain-free to be safe. In reality, mild to moderate discomfort during rehab-style exercise is often acceptable, especially with persistent knee pain – your physio can help you come up with guidelines to help you decide on your safe range.

What matters most is how your knee feels later that day and the next day. If symptoms return to baseline, you’re likely on the right track.


Strength is one of your knee’s best allies

Knees don’t work in isolation. They rely heavily on the strength and coordination of the hips, thighs, and calves.

Strengthening the muscles around the knee can help, and there are plenty of different exercises to do this, so if one doesn’t feel good, things like adjusting the angle of the joint, or the position of your body can really help.

You don’t need fancy equipment. What matters is gradual progression, ie starting where you are and building slowly.


Low-impact does not mean low-benefit

If high-impact activities currently aggravate your knee, that doesn’t mean you have to stop exercising. Many lower-impact options still provide meaningful benefits:

  • Cycling (stationary or outdoor)
  • Swimming or water-based exercise
  • Elliptical trainers
  • Walking on flat, even surfaces

These can help maintain joint motion, circulation, and confidence while you build strength for more demanding activities, if and when you choose to return to them.


Consistency beats intensity

Doing a small amount regularly is far more effective than pushing hard once in a while and then needing long recovery periods.

Think in terms of:

  • Frequency: short, frequent sessions
  • Progression: slow increases in difficulty
  • Flexibility: adjusting on flare-up days rather than stopping entirely

On tougher days, it’s okay to scale back. Movement can still be gentle and restorative. Range-of-motion work, light strengthening, or an easy walk all count.


Your experience matters

Two people can have the same knee diagnosis and very different experiences. That’s why listening to your body and your lived experience is so important. Fear, frustration, and past setbacks can all influence how pain is felt and interpreted.

A supportive approach to exercise respects both the physical knee and the person attached to it.


A final thought

Exercising with knee pain isn’t about pushing through or “toughing it out.” It’s about rebuilding trust in your knee, one manageable step at a time. With the right kind of movement, many people find not only reduced pain, but greater confidence, strength, and freedom in daily life.

If you’re struggling or feeling unsure, you don’t have to figure it out alone. Guidance from a knowledgeable professional can make the process clearer, and far less intimidating.

Your knees are resilient. With patience and the right support, movement can become part of the solution again.