Clamshells for Single Parents: Hip Strength for Knees
Knees that ache on the stairs. A lower back that grumbles after a day of picking up toys. One hip that clicks when you get off the floor after bath time. If that sounds familiar, the muscles on the side of your hips may need some attention. Clamshells for single parents are one of the easiest ways to start: you lie on your side, you need no kit, and you can do them on the bedroom floor after the kids are asleep without making a sound.
I have coached parents in Archway for over 10 years, and clamshells are one of the first moves I give to people with niggly knees or backs. They are not glamorous, but they work the glute muscles on the side of the hip that help keep your knees tracking well and your pelvis steady when you walk, climb stairs or carry a child on one hip.
Why hip strength matters for parents
Parenting is full of one-sided, awkward movement. You carry the toddler on the same hip every day, step up into the car with a car seat, and lunge down to grab a dropped dummy. If the muscles on the side of your hips are weak, your knees tend to roll inwards and your lower back picks up extra work. Strengthening them is a simple way to help your knees and back feel more comfortable. The NHS knee pain page notes that staying active and keeping muscles strong is part of looking after your knees, but if you have pain, check with your GP or a physio first.
How to do clamshells properly
- Lie on your side with your head resting on your lower arm or a cushion.
- Bend your knees to about 45 degrees, with your heels in line with your bottom and your hips stacked one on top of the other.
- Keep your feet together and lift your top knee as high as you can without your top hip rolling backwards.
- Pause for 1 to 2 seconds at the top. You should feel it in the side of your bottom, not the front of your thigh.
- Lower slowly over 2 seconds.
The cue that fixes most mistakes
Put your top hand on your top hip bone. If you feel it rolling back as your knee lifts, you are lifting too high. Make the movement smaller. A small, clean clamshell is worth far more than a big, wobbly one.
Clamshells for single parents: band progressions
Once you can do 20 slow reps each side with good form, it is time to make it harder. A cheap mini loop band is all you need.
Level 1: Bodyweight clamshell
2 sets of 12 to 15 each side, with a 2-second pause.
Level 2: Light band above the knees
Put a light mini band just above your knees. Same movement. 2 sets of 12 each side.
Level 3: Hips-up clamshell
Prop yourself on your forearm and lift your bottom hip off the floor into a side plank on your knees. Hold it there while you do the clamshell. 2 sets of 8 to 10 each side. This adds a lot of core work.
Level 4: Medium band and longer holds
Use a stronger band and hold each rep at the top for 5 seconds. 2 sets of 8 each side.
Stay at each level for at least a week or two. If a level causes pain in your hip or back, go back a step.
A 5-minute side-lying routine
Do this on the bedroom floor or on top of the bed after the kids go down. Do the whole thing on one side, then roll over and repeat.
- Clamshells: 15 slow reps
- Side-lying leg lift: straighten your top leg and lift it a little higher than your hip, toes pointing forward. 10 reps
- Reverse clamshell: knees together, lift your top foot up while your knees stay touching. 10 reps
- Top leg circles: small circles with a straight top leg, 8 each direction
- Hold: lift your top knee into a clamshell and hold for 20 seconds
That is about 2 and a half minutes each side. Finish with a glute bridge set on your back if you have one more minute in you. Bridges and clamshells together cover the back and side of the hips.
Fitting it into a solo parent’s day
- During story time: lie next to your child on the bed and do clamshells while they turn the pages.
- While they watch TV: lie on the living room floor and do one round of the routine.
- Before bed: one side-lying routine, then sleep. It is calm enough not to wind you up.
For more knee-friendly ideas, see my post on knee-friendly workouts.
When to see a GP or physio first
Clamshells are gentle, but they are not a cure. If you have hip, knee or back pain that is sharp, getting worse, waking you at night or came on after a fall, get it checked before exercising. The NHS back pain page lists warning signs. If you are pregnant or have recently had a baby, check with your GP. Postnatal, most people have a check around 6 to 8 weeks before going back to exercise. Clamshells are often one of the first moves physios suggest, but get the all-clear first.
Where a bootcamp class fits
Clamshells are a building block. In class, we use them in warm-ups, then turn that hip strength into squats, lunges and carries so it carries over to real life. The SYP Unlock hip and back mobility class is especially good if your hips and lower back feel stiff. For fitting the rest of your training around the kids, see my single parent fitness guide.
FAQs
Are clamshells good for knee pain?
Strengthening the side hip muscles can help many people with knee discomfort, but knee pain has lots of causes. Check with a GP or physio if you are in pain.
Why do I feel clamshells in the front of my hip?
Usually because your hip is rolling back or your knees are bent too much. Make the movement smaller and keep your heels in line with your bottom.
How many clamshells should I do?
Two sets of 12 to 15 each side is a good start. Add a band once 20 slow reps feel easy.
Can I do clamshells every day?
Yes, bodyweight clamshells are gentle enough for most people to do daily. With a band, every other day is plenty.
Book your first class
If you would like your hips, knees and back looked after by a coach, come and try a session. SYP Bootcamp runs 45-minute small-group classes indoors in Archway N19, no more than 10 people, £15 a class, and every move has easier and harder options. Book your £15 class here or call or WhatsApp me on 07301 512215. If you are working around an injury, read about my injury-safe personal training in Archway.
About the author
Artem Olekhnovych is a personal trainer in Archway and the founder of SYP Fitness and SYP Bootcamp. He has coached clients in Archway, Highgate and across North London for over 10 years, and runs small-group bootcamp classes for busy mums and dads. Read reviews from his 1-1 clients.
