My Baby Isn't Kicking Their Legs
The short answer
Most babies begin kicking their legs actively within the first few weeks of life, and leg kicking becomes more vigorous and coordinated by 2-3 months. If your baby is not kicking their legs or kicks very infrequently, it could be related to muscle tone, prematurity, or other factors. Your pediatrician can help determine if evaluation is needed.
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By Age
What to expect by age
0-2 months
Newborns move their legs in reflexive, somewhat jerky patterns. By 6-8 weeks, most babies are kicking more purposefully, especially when excited or during diaper changes. Premature babies may be less active initially, and this is expected. However, a full-term baby who rarely moves their legs, whose legs feel very floppy or very stiff, or who moves one leg much more than the other should be evaluated. Some newborns are simply calmer and move less, but a complete absence of leg movement is always worth discussing.
2-4 months
By this age, babies typically kick vigorously and joyfully, especially when they see a familiar face or during play. Their leg movements become smoother and more rhythmic. A baby who is still not kicking much by 3-4 months, or whose kicks are very weak, may have low muscle tone (hypotonia) or another neuromuscular condition. Tummy time and supervised play on their back encourage leg movement, but persistent inactivity should be discussed with your pediatrician.
4-6 months
Babies at this age are kicking strongly and beginning to discover their feet. They may grab their toes, push against surfaces with their feet, and kick in patterns. A baby who still shows minimal leg movement at this age needs evaluation. Your pediatrician may check muscle tone, reflexes, and hip stability, and may refer you to a pediatric neurologist or physical therapist.
6+ months
By 6 months, babies use their legs extensively for rolling, beginning to push up on hands and knees, and bearing weight when held upright. If your baby is not using their legs for these activities, early intervention through physical therapy can help build strength and movement patterns. The earlier any underlying issue is identified, the more effective the intervention tends to be.
What Should You Do?
When to take action
- Your newborn kicks their legs but less vigorously than other babies you have seen, as there is a wide range of normal activity levels.
- Your premature baby is less active with leg movements but is gradually becoming more vigorous as they grow.
- Your baby kicks more at certain times of day and is calmer at others, but does kick actively when alert and happy.
- Your baby went through a brief phase of reduced kicking during an illness but has returned to normal activity.
- Your baby rarely kicks their legs even when awake, alert, and stimulated.
- Your baby's leg movements seem weak or they do not resist when you gently hold their legs.
- Your baby kicks one leg noticeably more than the other on a consistent basis.
- Your baby has suddenly stopped moving their legs or has a dramatic decrease in leg movement, which could indicate a neurological or spinal cord issue.
- Your baby's legs feel completely limp and they show no resistance when you move their legs, combined with other concerns like feeding difficulty or weak cry.
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
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Related Physical Concerns
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.
My Baby Crawls Unevenly
While some variation in crawling patterns is normal, consistently favoring one side or dragging one limb while crawling warrants attention. Babies should use both arms and both legs relatively equally when crawling. Persistent asymmetry could indicate muscle tone differences, hip issues, or neurological concerns that benefit from early evaluation.
My Baby Still Has the Fencing Reflex (Persistent ATNR)
The asymmetric tonic neck reflex (ATNR, also called the fencing reflex) causes your baby to extend the arm on the side they are looking toward. It should integrate between 4-6 months. If the ATNR persists strongly beyond 6 months, it can interfere with bringing hands to midline, bilateral hand use, and rolling. Evaluation is recommended.
Signs of Ataxia in Babies and Toddlers
Ataxia refers to wobbly, uncoordinated movements that result from problems with the cerebellum (the brain's coordination center). Signs include an unsteady, wide-based gait, difficulty with precise hand movements, and intention tremor (shaking that worsens when reaching for something). If you notice these signs, evaluation by a pediatric neurologist is important.