6 Knock Knees Exercises for Kids to Try at Home

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Most parents notice knock knees when their child is around three or four years old. The knees press together while the ankles stay apart, and it can look a little worrying. As a posture correction specialist and a mom of two, I see this pattern all the time. The good news is that knock knees are usually a normal part of how kids grow. In this post, I'll walk you through what knock knees actually look like, when they need attention, and six knock knees exercises for kids you can start at home today.

What Knock Knees Look Like (and When They're Normal)

Knock knees, or genu valgum, happen when a child stands with their knees touching but their ankles spaced apart. You might spot it when your child walks, runs, or just stands in line at the grocery store. It often shows up between ages two and four, and it tends to be most noticeable around age three.

Here is what is happening inside the body. As kids grow, their leg bones shift through different angles. Babies often start with bowed legs, then swing toward a knock knee pattern by age three or four. According to the Nemours KidsHealth resource on knock knees, up to 99 percent of children with knock knees grow out of it by age seven or eight. The legs gradually straighten as muscles and bones mature together.

A child with mild knock knees will still run, jump, and climb without trouble. Their gait might look slightly different, but it rarely causes pain at this stage. Think of it as the body's way of finding its final alignment. My own kids went through phases where their knees looked a bit closer together, and both straightened out with time and consistent movement.

If your child shows signs of valgus knees, pay attention but try not to worry right away. The pattern usually resolves on its own. The exercises below can help support that process by building strength in the muscles that guide knee position.

Signs That Knock Knees Need Attention

While most cases of knock knees are perfectly normal, a few signs suggest it might be worth talking to your pediatrician. Keep an eye out for the following.

• Knock knees that appear after age six or get worse instead of better

• Pain in the knees, hips, or ankles during everyday activities

• A gap between the ankles greater than about three inches (roughly 8 centimeters) when the knees are touching

• One leg looking more angled than the other (asymmetry)

• Difficulty walking, running, or keeping up with other kids

A study published on PubMed about genu valgum assessment notes that an intermalleolar distance greater than 8 cm may indicate a pattern worth investigating further. If you notice any of these signs, your pediatrician can measure leg alignment and decide if imaging or a referral to a pediatric orthopedist makes sense.

For the majority of kids, though, knock knee correction exercises combined with active play are enough to support healthy alignment as they grow. That is the approach I take with the families I work with, and it is also what I do with my own children.

6 Knock Knees Exercises for Kids That Strengthen Alignment

These six exercises target the hip abductors, glutes, and ankle stabilizers, the muscle groups that influence knee position most. Each one uses a playful name from my Posture and Feet course so your child stays engaged. Aim for three to five sessions per week, and keep each session around ten to fifteen minutes.

Towel Scrunch

Have your child stand with feet hip-width apart, knees slightly bent, like a bear getting ready to walk. They shuffle sideways for about ten steps to the right, then ten steps back to the left. Hands stay out in front like big bear paws.

This exercise fires up the hip abductors and gluteus medius, two muscles that pull the knees into better alignment. Start with two sets of ten shuffles in each direction. If your child finds it too easy, have them stay lower in the squat position.

Single-Leg Balance Hold

Your child lies on their side with legs stacked and knees bent at about 90 degrees. Keeping feet together, they lift the top knee toward the ceiling like an airplane wing opening, then slowly lower it. You can learn the full version of this exercise on the Single-Leg Balance Hold page.

This move targets the outer hip and is one of the most effective knock knee correction exercises I recommend. Start with ten lifts per side, two sets each. The slower they go, the better it works.

Heel Raise with Mini Squat

Your child stands with feet shoulder-width apart, then rises up onto their toes. While staying on tiptoes, they lower into a shallow squat and hold for three seconds before standing back up. Imagine riding a trolley that dips and rises along a track.

This exercise builds calf strength and ankle stability, both of which support better knee tracking. Start with eight repetitions and build up to twelve over a few weeks. If balance is tricky at first, let them hold a wall or chair.

Bridge Hold

Your child lies on their back with knees bent and feet flat on the floor. They place a soft ball or rolled-up towel between their knees. Then they squeeze the ball while lifting their hips into a bridge, hold for five seconds, and lower back down. It looks like two beetles pushing against each other.

The inner thigh squeeze combined with the glute bridge strengthens both the adductors and glutes. This balance of inner and outer leg muscles matters a lot for how to fix knock knees in children over time. Do two sets of eight bridges.

Standing Knee Lift

Your child stands on one foot, like a flamingo at the ballet. The standing knee stays slightly soft (not locked). They lift the other leg out to the side, hold for three seconds, and bring it back. A wall or chair can help with balance.

Single-leg exercises train the hip and ankle stabilizers on each side independently. This is especially helpful when one leg has more valgus than the other. Start with six lifts per side, two sets. As balance improves, try it without holding anything.

Side Lunge Stretch

Your child sits on the floor with the soles of their feet pressed together and knees dropped out to the sides, like a dragon opening its wings. They gently press the knees toward the floor using their elbows, hold for fifteen seconds, then release.

This stretch opens up the inner thighs and hips, which can feel tight in kids with knock knees. It is a great cool-down after the strength exercises. Do three holds of fifteen seconds each. Remind your child to keep their back straight and breathe slowly.

For video-guided versions of all six exercises, my Posture and Feet course walks you through each one step by step with demonstrations your child can follow along with.

Building a Daily Routine Around These Exercises

Consistency matters more than intensity with knock knees exercises for kids. A short daily session works better than a long one twice a week. Here is a simple structure I use with my own family.

Pick three exercises per session and rotate through all six over the course of two days. Morning is a great time because kids tend to have more energy and focus. Pair the exercises with something your child already does, like right before breakfast or after brushing teeth. This habit stacking makes it feel less like a chore.

Keep each session between eight and fifteen minutes. Young kids (ages three to five) do better with five to eight minutes. Older kids (ages six and up) can handle closer to fifteen. If your child resists, turn it into a game. Time them with a stopwatch, let them pick the order, or do the exercises together as a family.

Track progress with a simple chart on the fridge. A sticker for each completed session adds motivation without pressure. After four to six weeks of regular practice, you may notice your child's legs look a bit straighter, their balance improves, or they move with more confidence.

The goal is not perfection. The goal is building muscle patterns that support how your child's body naturally wants to align. These exercises work best as a steady, low-pressure habit.

What Else Supports Knee Alignment in Growing Kids

Exercise is one piece of the puzzle. A few other factors play a big role in how your child's knees track as they grow.

Footwear matters more than most parents realize. Shoes that are too stiff or too narrow can change how the foot lands, which affects the ankle, which affects the knee. Flexible, flat shoes with a wide toe box let the foot move naturally. I cover this in detail in my Ultimate Footwear Guide for kids.

Active free play is just as important as structured exercises. Climbing, running on uneven ground, squatting to pick things up, and balancing on rocks or logs all challenge the small stabilizer muscles around the knee and ankle. The more varied the movement, the better.

Sitting positions can also influence alignment. Kids who frequently sit in a W position (knees in, feet out to the sides) may reinforce an inward knee pattern. Encourage cross-legged sitting, long sitting with legs extended, or sitting on a small stool instead.

Healthy body weight also supports joint alignment. According to Boston Children's Hospital, excess weight can place additional stress on growing knee joints and may contribute to valgus knees in children. Active play and balanced nutrition help here too.

If your child also shows signs of flat feet, that can contribute to a knock knee pattern. I wrote a detailed post on flat feet exercises for kids that pairs well with the exercises in this article.

Quick Quiz: Test Your Knock Knees Knowledge

Question 1: At what age do knock knees typically become most noticeable?

A) 6 months

B) 3 to 4 years

C) 10 years

D) At birth

Answer: B. Knock knees tend to be most visible between ages three and four.

Question 2: What percentage of children with knock knees outgrow the condition naturally?

A) About 25%

B) About 50%

C) Up to 75%

D) Up to 99%

Answer: D. Up to 99 percent of kids with knock knees outgrow it by age seven or eight.

Question 3: Which muscle group is most important for improving knock knee alignment?

A) Biceps

B) Hip abductors and glutes

C) Chest muscles

D) Neck muscles

Answer: B. The hip abductors and glutes guide the knee into proper alignment.

Question 4: How long should a daily knock knees exercise session last for young kids?

A) 30 to 45 minutes

B) 5 to 8 minutes

C) 1 hour

D) 2 minutes

Answer: B. Young kids (ages three to five) do best with five to eight minute sessions.

Question 5: What type of footwear best supports natural knee alignment in children?

A) High-heeled boots

B) Stiff, rigid sneakers

C) Flexible shoes with a wide toe box

D) Shoes one size too small

Answer: C. Flexible, flat shoes with a wide toe box allow the foot and leg to move naturally.

A Structured Program for Stronger Alignment

If you want a complete, video-guided program that goes beyond these six exercises, my Posture and Feet course gives you a full system built for kids ages two through twelve. It covers knock knees, flat feet, balance, and overall alignment with daily routines your child can follow on screen.