Exercises after ACL surgery at home

Follow your own protocol first

ACL reconstructions use different grafts (hamstring, patellar tendon, quad tendon or donor), and some include meniscus repair too. Each changes what you can do and when. Your surgeon and physio will give you a protocol; this guide explains the common building blocks so it makes sense.

Return to sport is usually decided by tests, like strength compared with your other leg and hop tests, rather than a date.

Early goals: straighten, bend, switch the quad on

• Full straightening (extension) early on, often with the heel propped on a rolled towel and nothing under the knee.
• Quad sets: tighten the thigh to press the knee down, hold 5 seconds, 10 reps, several times a day.
• Straight leg raises once you can lock the knee without a lag, as your team allows.
• Heel slides to gradually bend the knee, within your protocol's limits.
• Ankle pumps to keep blood moving.

Middle stage: strength and normal walking

• Walking without a limp, then without crutches when cleared.
• Mini squats and sit to stand, building range gradually.
• Bridges and hamstring work (often delayed with a hamstring graft).
• Step-ups and slow step-downs.
• Calf raises and single-leg balance near support.
• Stationary bike, when your physio says the knee bends far enough.

Later stage: power and sport

• Single-leg strength: split squats, single-leg squats to a box.
• Jumping and landing drills, first on two legs, then one.
• Running when cleared, usually on a straight line first.
• Cutting, pivoting and sport-specific drills, last of all.

Common pitfalls

• Losing full straightening. It's much easier to keep than to win back.
• Skipping quad work because walking feels fine.
• Rushing back to sport when the knee feels good but strength tests aren't there yet.
• Comparing your timeline with someone who had a different graft or surgery.

Call your team if

• Your calf is painful, swollen or red, or you're short of breath.
• The wound is red, hot or leaking, or you have a fever.
• The knee swells a lot, locks, or gives way.
• You're losing range of motion rather than gaining it.

A typical early home day

In the first weeks, many programs split exercises into two or three short sessions a day: quad sets, straight leg raises, heel slides and time with the leg resting straight, followed by ice and elevation. Walking is short and frequent, using the crutches and brace you were given. Swelling control is part of the job, because a swollen knee switches the quad off.

Little and often is the theme. Ten minutes three times a day usually beats one long session that leaves the knee puffy the next morning.

Tracking progress in plain terms

• Can you straighten the knee fully, matching the other side?
• How far does your heel slide back?
• Can you do a straight leg raise without the knee bending?
• How long can you walk without a limp?
• How steady is your balance on the operated leg?

Why the quad matters so much

After ACL surgery, the thigh muscle often weakens quickly and can be slow to come back. Strong quads protect the knee, help you walk normally and are one of the main things checked before running and sport. That's why so many protocols keep quad work going for months, long after the knee feels fine for daily life.

If the quad feels hard to switch on at first, that's common. Keep practising quad sets; your physio may add electrical stimulation or other tools.

Mindset over a long rehab

ACL recovery takes most of a year, and the middle months can feel slow. Setting small goals (full straightening, walking without crutches, first bike ride, first jog) helps. Write them down and bring them to appointments, so your physio can tell you which ones are next.

Before your next appointment

Write down how far the knee bends and whether it fully straightens, how much swelling you get after exercise, and which exercises still feel hard. Note any clicks, giving way or new pain. Your physio will use this, plus their own measurements, to decide what to add next.

Ask what the next milestone is and what you need to show to get there. Knowing the goal, for example a certain number of single-leg sit to stands or hopping without pain, makes the home sessions feel more purposeful.

Life outside the exercises

• Ice and elevation after sessions, if your team recommends it.
• Sleep with the knee supported straight rather than bent over a pillow.
• Ask your team about driving, work and travel timelines.
• Keep the rest of your body fit: upper-body and core work, and the other leg, as cleared.

Where Apex One fits

Apex One has no ACL or post-surgery program. Once your physio clears you for general strength work, the Knee: general strength program and the camera-counted squats and lunges can help with consistent training, only with their okay. Before any rehab program you tick a box confirming your physio or doctor has approved it.

Count every rep with your phone

Questions

Keep exploring

• Knee rehab exercises at homeGuide
• Knee strengthening exercisesApex One
• Exercises after knee replacement at homeGuide
• Rehab exercisesApex One