Originally published 2018-04-29.
If your knees ache on the stairs, your hips feel stiff after sitting, or your feet are sore by evening, gentle strengthening and stretching is one of the most widely recommended places to start. Six simple moves cover all three areas: wall squats and step-ups for the knees, a tennis-ball heel pump and a wall calf stretch for the feet, and glute bridges and side-lying leg raises for the hips. None needs equipment beyond a wall, a step and a ball.
These exercises are not a cure for every kind of pain, and they cannot tell you why something hurts. What they can do is build strength and flexibility in the muscles that support your joints, which orthopaedic and physiotherapy guidance consistently links with less pain and better function for many common problems. Below you will find why these joints are connected, how to do each move well, and the warning signs that mean you should see a professional first.
Why the knee, hip and foot work as a team
Your leg is a chain. When you walk, the foot absorbs impact and adapts to the ground, the knee bends and straightens like a hinge, and the hip steadies the whole limb and keeps the pelvis level. If one link is weak or stiff, the others often pick up the slack. Weak hip muscles, for instance, can let the knee drift inward on each step, and tight calves can change how load passes through the foot and knee.
That is why a routine for "knee pain" so often includes hip and calf work. Strengthening the muscles around a joint spreads the load more evenly and improves control. The American Academy of Orthopaedic Surgeons' knee, hip and foot conditioning programmes all follow the same pattern: warm up, stretch, strengthen, then stretch again.
Joint pain is extremely common. An Institute of Medicine report estimated that about 100 million American adults live with chronic pain of some kind, and joint and back problems are among the leading causes. Knee pain in particular becomes more frequent with age and is a major reason people slow down or stop exercising, which can create a cycle of weaker muscles and more pain.
Before you start: a few ground rules
A little muscle effort or mild, short-lived discomfort is normal when you begin. Sharp pain, pain that builds as you go, or pain that lingers the next day is a signal to stop and get advice. The AAOS programmes put it simply: you should not feel pain during an exercise.
- Warm up first. Five to ten minutes of easy walking or cycling makes muscles and joints more ready to work.
- Start small. One or two sets of eight to ten slow repetitions is plenty in the first week.
- Move slowly and with control. Swinging or bouncing shifts the work away from the muscles you are trying to train.
- Be consistent. Most structured programmes run for four to six weeks before people notice clear changes, then continue a few days a week to maintain gains.
- Talk to a doctor or physiotherapist if you have had recent surgery, an injury, a joint that gives way, swelling, numbness, or pain at night or at rest.
Two moves for the knees
1. Wall squat
The wall squat strengthens the quadriceps, the big muscles on the front of the thigh that control the knee. Because the wall supports your back, it is easier to keep good form than with a free squat, and WebMD lists it among useful knee-strengthening moves.
Stand with your back flat against a wall and your feet about hip to shoulder width apart, a step or so out from the wall. Slowly slide down by bending your knees, keeping your back and hips touching the wall. Go only as low as feels comfortable; a quarter or half squat is enough, and your knees should not travel past your toes. Hold for a few seconds, then slide back up. As you get stronger, aim for holds of around ten seconds and add a second or two over time. If the knee hurts, return to standing and try a shallower position next time.
2. Step-up
Step-ups train the knee in a movement you use every day: climbing stairs. They demand more effort than the wall squat, so go slowly. Use the bottom stair or a low, sturdy step, and hold a rail if you need balance.
Place one whole foot on the step. Keeping your hips level, press through that heel to lift yourself up, then lower the other foot back down under control until the toes touch the floor. Return to the top and repeat before switching legs. Watch that the working knee points over your middle toes rather than collapsing inward. A lower step makes it easier; a higher one makes it harder.
Two moves for sore feet and calves
3. Tennis-ball heel pump
Personal trainer Jillian Michaels has recommended a simple move for tired, sore feet: sit on a low step or chair, place a tennis ball under each heel, lean forward with your forearms on your knees to add some body weight, and slowly lift and lower your heels against the balls for a couple of minutes. It works the small muscles of the foot and gives the soles a gentle massage. Similar ball-rolling under the arch appears in clinical foot programmes, which suggest about two minutes at a time.
4. Wall push (calf stretch)
The UK's Chartered Society of Physiotherapy includes this wall stretch in its advice for foot problems, and it is close to the "heel cord stretch" in American orthopaedic programmes. Tight calf muscles pull on the Achilles tendon and the sole of the foot, so loosening them can ease heel and arch discomfort.
Face a wall with your hands on it at about shoulder height. Step one foot forward so the toes are roughly 30 cm from the wall, and keep the other leg straight behind you with the heel pressed down. Bend the front knee toward the wall until you feel a stretch in the back leg's calf. Hold for around 30 seconds without bouncing, keep your back straight, then switch sides. Bending the back knee slightly shifts the stretch lower, toward the Achilles.
Two moves for the hips
5. Glute bridge
Healthline and many physiotherapists recommend the bridge because it works the gluteal muscles and hamstrings, which drive hip extension and help protect both the hip and the knee. It is done lying down, so it is gentle on painful joints.
Lie on your back with knees bent and feet flat on the floor, about hip width apart. Press down through your heels and squeeze your buttocks to lift your hips until your shoulders, hips and knees form a straight line. Pause for a breath, then lower slowly. You should feel the effort in your buttocks and the backs of your thighs, not your lower back; if your back takes over, do not lift as high.
6. Side-lying leg raise
This move strengthens the hip abductors, especially the gluteus medius, on the outside of the hip. These muscles keep your pelvis level when you stand on one leg and stop the knee from caving inward. Healthline has described the move as helping the iliotibial (IT) band, but that band is tough connective tissue that cannot be strengthened itself; the benefit comes from the muscles around it, one of which attaches to it.
Lie on one side with your legs straight and stacked, resting your head on your lower arm or stretching it out for balance. Keeping the top leg straight and the toes pointing forward, lift it slowly to a comfortable height, then lower it under control. Avoid rolling the hips backward or turning the foot up to lift higher, a mistake the AAOS hip programme specifically warns against. Do the same number on each side.
Putting it together, and common myths
A simple plan is to do all six moves on three or four days a week, after a short warm-up: the two stretches can be done daily. Start with one set of eight to ten repetitions for the strength moves and one 30-second hold for each stretch. When an exercise feels easy for a full week, add a second set before making it harder. Keeping a short note of what you did and how your joints felt the next day helps you spot what suits you.
A few beliefs tend to hold people back:
- "If it hurts, I should rest completely." Short rest helps after an acute injury, but long-term inactivity usually weakens the muscles that protect a joint. Guided, gradual movement is the usual advice for ongoing aches.
- "Squats are bad for knees." Deep, heavy or badly controlled squats can aggravate some knees, but shallow, supported squats are a standard part of knee programmes.
- "Only the sore joint needs work." Because the leg works as a chain, hip and calf strength often matters for knee and foot comfort.
- "More is better." Doing far more than your body is used to is a common cause of flare-ups. Steady, modest progress wins.
Exercise also works best alongside other everyday habits: comfortable, supportive footwear, breaking up long periods of sitting, and keeping active with low-impact activities such as walking, cycling or swimming. If you are carrying extra weight, even modest weight loss reduces the load on the knees with every step.
If pain started after a fall or twist, if a joint is hot, red or very swollen, if you cannot bear weight, or if symptoms keep getting worse despite a few weeks of sensible exercise, stop and talk to a doctor. A physiotherapist can also tailor a programme to your own joints, which is always better than a general list.
Sources: AAOS OrthoInfo: Knee Conditioning Program; AAOS OrthoInfo: Hip Conditioning Program; AAOS OrthoInfo: Foot and Ankle Conditioning Program; Institute of Medicine, Relieving Pain in America; exercise suggestions as reported from WebMD, Healthline, Jillian Michaels and the Chartered Society of Physiotherapy.
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