My Baby Walks with Stiff Legs
The short answer
Some stiffness in early walking is normal as babies learn to coordinate their leg muscles. However, persistent stiff-legged walking that does not improve over weeks may indicate increased muscle tone (hypertonia) that should be evaluated. Most babies develop a more fluid walking pattern within a few months of starting to walk.
Parents everywhere have the same worry. You are doing the right thing by looking into it.
By Age
What to expect by age
New walkers often have a somewhat stiff gait as they learn to coordinate their movements. Bending the knees while walking requires balance and muscle control that develops with practice. If your baby's walking is stiff but improving week by week, this is part of normal learning. Watch for gradual improvement.
Your toddler's walking should be becoming more fluid over time. Some stiffness when excited or on new surfaces is normal. If your child consistently walks with very stiff, straight legs and does not seem to be developing a more natural bend, discuss it with your pediatrician. They can check muscle tone and reflexes.
By this age, walking should look fairly fluid with good knee flexion. If your child still walks with noticeably stiff legs, especially if combined with toe walking, scissoring (legs crossing), or difficulty squatting, your pediatrician should evaluate for hypertonia or other neuromuscular concerns.
Persistent stiff-legged walking at this age warrants a thorough evaluation. Your child should be walking, running, and squatting with relatively fluid movements. A pediatric neurologist can assess whether increased muscle tone or other factors are contributing to the pattern.
What Should You Do?
When to take action
- Your baby just started walking and the stiffness is improving week by week.
- Your baby walks stiffly when excited but can walk more normally at other times.
- Your baby can bend their knees to squat, climb, or sit down from standing.
- The stiffness is equal on both sides.
- Your child has been walking for more than 3 months with no improvement in leg stiffness.
- Your child has difficulty bending their knees to squat or climb stairs.
- The stiffness is worse on one side than the other.
- Your child also toe walks or their legs seem to cross when walking.
- Your child's walking has become stiffer over time rather than improving.
- Your child has developed leg stiffness along with other new symptoms like tremors or falls.
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
Related Physical Concerns
My Baby Seems Too Stiff (Hypertonia)
Hypertonia means your baby's muscles feel unusually tight or stiff, making it hard to bend or move their limbs. While some stiffness can be normal during certain movements (like when a baby is startled or upset), persistent stiffness at rest warrants evaluation. Early identification and physical therapy can make a significant difference.
My Baby Is Walking on Their Toes
Toe walking is extremely common when babies are first learning to walk and is usually nothing to worry about. Up to 5% of children toe walk at some point, and most outgrow it by age 2-3. It only becomes a concern if it persists past age 2 or if your child seems unable (rather than unwilling) to put their feet flat.
Signs of Spasticity vs Normal Stiffness in Babies
Spasticity is velocity-dependent stiffness, meaning muscles resist fast movement more than slow movement. Normal baby stiffness occurs briefly during excitement or startle and resolves quickly. Spasticity is persistent, may affect one or more limbs, and often worsens with growth. Your pediatrician can perform specific tests to distinguish between normal tone variation and spasticity.
My Baby Seems to Use One Side More Than the Other
Babies should use both sides of their body fairly equally during the first 18 months of life. While slight preferences can be normal, a consistent pattern of favoring one side - using one arm much more than the other, crawling with one leg dragging, or turning the head predominantly one way - should always be discussed with your pediatrician. Early identification of asymmetry leads to the best outcomes.
My Baby Only Army Crawls
Army crawling (also called commando crawling) is a completely valid and normal way for babies to move. Many babies army crawl for weeks or even months before transitioning to hands-and-knees crawling, and some skip hands-and-knees crawling entirely. What matters is that your baby is independently mobile and exploring their environment.
One Side of My Baby's Body Moves Differently
Babies should generally use both sides of their body equally. If one side consistently moves differently, is weaker, stiffer, or less coordinated, this warrants evaluation. Asymmetric movement can indicate hemiplegia (cerebral palsy affecting one side), brachial plexus injury, or other neurological conditions that benefit from early therapy.