How do you build a workout plan for a client with knee pain?

The short answer

With knee complaints you avoid deep loaded flexion, high-impact jumping and anything that provokes pain during or after the session, and you keep training the leg instead of skipping it. Quadriceps strengthening is one of the best-supported interventions for knee osteoarthritis, so the plan keeps controlled lower body work: partial-range squat patterns, leg press within a comfortable range, hip bridges and machine-guided work. The load builds gradually across a block of 3 to 6 weeks, and pain that persists more than 24 hours after a session is the signal to step back a level.

Not medical advice. This is general programming guidance for trainers. It does not replace clearance from a physician or physiotherapist, and any exercise that causes pain should be stopped. Full notice.

Knee pain is the second thing a trainer hears about, right after backs. The instinct is to leave the legs alone, and it is the wrong instinct: for the most common cause of a sore knee in an adult client, structured strength training is among the most effective things you can offer. What has to change is the selection, not the presence of leg work.

What comes out of the plan

Deep loaded knee flexion is the first thing to drop while complaints are active: a full-depth back squat under load, a deep leg press with the knees stacked into the chest, deep lunges under weight. The compressive and shear forces at the joint rise sharply through the last part of that range.

High-impact work is second: jump squats, box jumps, plyometric variations, running on hard surfaces. The problem is not the movement, it is the repetition rate combined with the landing force.

Third is anything that provokes pain during the exercise or in the 24 hours after it. That is a client-specific filter no exercise list can decide for you, and it overrides every general rule.

What stays in, and why it matters

Quadriceps strength is one of the strongest modifiable factors in knee osteoarthritis, and exercise therapy is a first-line recommendation in the major clinical guidelines rather than an optional extra. A client who stops training their legs because their knee hurts is removing the one intervention with the best evidence behind it.

In practice that means keeping the movement patterns and shrinking the range. A goblet squat to a box at a comfortable depth, a leg press through the pain-free portion of the range, a hip bridge, a machine leg extension in a limited arc, step-ups to a low step. These load the same muscles without asking the joint to go where it hurts.

Cardio stays too, in low-impact form. A stationary bike, a cross trainer or a rowing machine gives the cardiovascular stimulus without the landing forces. For many clients with knee complaints, the bike is also the best warm-up there is.

Squat pattern to a box or to a comfortable depth, load added over the block
Leg press within the pain-free part of the range
Hip bridge and hip hinge work, which load the posterior chain with little knee flexion
Machine-guided single-joint work in a limited arc
Low-impact cardio: bike, cross trainer, rowing machine

Build up slowly and predictably

A sensitive joint responds badly to jumps in load and well to predictability. Build across a block of 3 to 6 weeks with a fixed step of roughly 5% per week, rather than improvising session by session. If something goes wrong, a predictable line makes it immediately obvious which step was too much.

Use a simple rule for the client: pain during the exercise means stop that exercise; discomfort that settles within a day is acceptable; pain that is still there the next morning means the previous session was too much. That gives the client a decision they can make on their own between sessions.

Where a trainer's job stops

A knee that swells, locks, gives way or hurts sharply at a specific point is not a programming problem. Those belong with a doctor or a physiotherapist, and a training plan is not the right response to them.

The same goes for a knee after surgery. A client with a recent replacement or reconstruction trains inside a protocol set by their treating clinician; the trainer's job there is to execute that protocol, not to write around it.

It is worth being explicit with the client about this line. A trainer who says clearly what they do and do not judge is more trusted, not less.

Making it hold up in practice

The realistic failure mode is not choosing the wrong exercise on purpose. It is a busy Friday, a client whose knee you filed away weeks ago, and a template you reuse because it is quick.

That is the case for having the constraint sit in the tool rather than in your memory. In RungGym, ticking knee complaints removes every exercise the database flags as contraindicated for that condition, with the reason and the source attached, so the plan cannot contain one regardless of how rushed the evening was.

Frequently asked questions

Can a client with knee osteoarthritis squat?

Usually yes, within a limited range. A squat to a box at a comfortable depth loads the quadriceps without taking the joint into deep flexion. What comes out of the plan is the deep loaded version, not the pattern itself.

Should a client with knee pain avoid leg exercises altogether?

No. Quadriceps strengthening is one of the best-supported interventions for common knee complaints, and clinical guidelines put exercise therapy first rather than last. Removing leg work removes the treatment.

When do you send a client to a doctor instead?

Swelling, locking, the knee giving way, sharp point-specific pain, or pain following a trauma. Also any knee inside a post-operative protocol. Those are clinical questions, and a training plan is not the answer to them.

How do you keep this straight across fifteen clients?

You do not, from memory. Record the condition on the client rather than in your head and let the plan be built around it, so the constraint applies on a rushed evening as reliably as on a calm one.

Sources

The exercise selections and exclusions in this article follow generally accepted practice in personal training and the contraindication list in the RungGym exercise database. They are not taken from a single guideline. The dosage figures (sets, reps, rest, frequency) come from the sources above.

In short

Keep training the legs. Drop deep loaded flexion and impact work, keep controlled squat and hinge patterns within a pain-free range, use low-impact cardio, and build the load about 5% per week across a block. Pain lasting beyond 24 hours means step back; swelling, locking or giving way means refer.