Most babies start bearing some weight on their legs around 4 to 6 months old, when you hold them upright on your lap and they push down against your thighs. This early bouncing is one of the first signs that leg muscles are developing strength. From there, the progression toward standing and walking unfolds over the next several months, with most babies taking independent steps around their first birthday.
The Newborn Stepping Reflex
If you hold a newborn upright with their feet touching a flat surface, you’ll notice something surprising: they’ll lift and lower their legs in a stepping motion. This isn’t actual weight-bearing. It’s a primitive reflex driven by spinal cord and brainstem circuitry, not conscious muscle control. Even babies born without higher brain structures show this same stepping pattern, which tells researchers it’s hardwired into the nervous system from birth.
This reflex typically fades by about 2 months of age as the baby’s legs grow heavier relative to their muscle strength. It’s not a sign of readiness to stand or walk. The voluntary, purposeful weight-bearing that matters for development comes later, once the brain’s higher motor centers begin taking over from those early reflexes.
4 to 6 Months: Bouncing and Pushing Down
Around 4 months, you can start holding your baby securely under the arms with their feet resting on your lap, letting them push against the surface and bounce. The CDC includes this as a play activity appropriate for 4-month-olds. By 6 months, most babies will actively bounce when held in a standing position, bearing partial weight through their legs while you provide balance and support. This bouncing phase is a workout for the muscles in their hips, thighs, and calves, all of which need to strengthen considerably before standing becomes possible.
Sitting independently, which typically emerges around 6 months, develops alongside this early leg strength. The core stability a baby builds while learning to sit upright carries over directly into the trunk control they’ll need for standing later on.
8 to 10 Months: Pulling Up and Cruising
The real shift happens when babies start pulling themselves to a standing position using furniture, your hands, or anything sturdy enough to grab. This usually begins between 8 and 10 months. At first, they’ll stand holding on with both hands, legs wide apart, weight shifting unevenly. Their arms do a lot of the work initially.
Cruising, where a baby walks sideways while holding onto a couch or coffee table, typically starts around 10 months. Researchers define the onset of cruising as the first time an infant can walk sideways at least 3 feet along furniture without stopping. During cruising, babies are bearing nearly all their weight on their legs but avoiding the hardest part of walking: balancing on one foot while the other swings forward. It’s a clever intermediate step that lets them practice weight-bearing without the balance demands of independent walking.
10 to 12 Months: Standing and First Steps
In the weeks before independent walking, babies cycle through several transitional skills. They stand holding furniture with one hand instead of two. They take forward steps while gripping a caregiver’s hands. Some will briefly let go and stand unsupported for a few seconds before grabbing on again. Each of these moments represents increasing confidence in single-leg support, which is the fundamental challenge of walking.
Most babies take their first independent steps around 12 months, though the normal range stretches from about 9 to 15 months. Hands-and-knees crawling typically starts around 8.5 months, but not all babies crawl before they walk, and skipping crawling isn’t a developmental concern on its own.
Why Bowed Legs Are Normal at First
When babies start standing and walking, many parents notice their legs look bowed. This is completely normal. Bowed legs (the medical term is genu varum) can be present from birth and are especially visible once a child starts bearing weight. The bowed appearance happens partly because children rotate their shins outward to point their feet straight ahead while walking.
Physiologic bow-leggedness typically resolves on its own by the second year of life. By age 3, the legs usually shift slightly in the opposite direction, becoming mildly knock-kneed before straightening into their adult alignment. No treatment is needed for this natural progression.
Activities That Build Leg Strength
You don’t need special equipment to help your baby develop the leg strength for standing. A few simple positions during everyday play can make a difference:
- Lap bouncing: From about 4 months on, hold your baby securely under the arms with feet on your lap and let them push and bounce.
- Standing at furniture: Once your baby can pull up (usually 8 to 10 months), encourage them to stand at the couch or a low, stable surface. Stay close for safety.
- High kneeling: Help your baby kneel upright at a low surface like a cushion on the floor or a small toy box. Support at the hips if needed. This strengthens the hips and core.
- Half kneeling: One knee up, one knee down. This position builds the strength pattern your baby will eventually use to stand up from the floor.
- Reaching forward from sitting: Place toys just beyond arm’s reach so your baby leans forward over their feet. This shifts weight into the legs and builds the connection between sitting and standing.
One thing to skip: baby walkers with wheels. The American Academy of Pediatrics has called for a ban on their manufacture and sale. Despite what many parents assume, walkers don’t help children learn to walk. They can actually delay walking onset, and they pose serious injury risks from falls and collisions.
Signs of a Possible Delay
Babies develop on their own schedules, and a few weeks’ difference from the “average” timeline rarely means anything is wrong. That said, there are a couple of things worth paying attention to. If your baby’s legs feel unusually stiff when you try to move them, or if they seem very floppy and can’t push down at all by 6 months, those are patterns worth mentioning to your pediatrician. Most children who seem a little behind will catch up on their own, but early evaluation can identify the small number who benefit from extra support.
The American Academy of Pediatrics offers a free online screening tool for parents called “Does My Child Have Physical Developmental Delays?” that covers babies from 2 months through age 5. It can be a useful starting point if you’re unsure whether what you’re seeing falls within the normal range.