By 4 months old, your baby should be getting at least 15 to 30 minutes of total tummy time each day, spread across multiple sessions. Most 4-month-olds can handle longer individual sessions than they could as newborns, so you can gradually work toward 40 to 60 minutes total if your baby tolerates it well. The key is cumulative time throughout the day, not one long stretch on the floor.
Daily Totals and Session Length
Pediatricians recommend that babies reach 15 to 30 minutes of daily tummy time by around 2 months of age. By 4 months, your baby has likely been practicing for a while and can build beyond that baseline. The NIH suggests starting with two or three short sessions of 3 to 5 minutes each day for younger babies, then making sessions “longer and more regular” as the baby grows.
For a 4-month-old, that typically means sessions of 5 to 15 minutes each, repeated three to five times throughout the day. Some babies will happily stay on their bellies for 20 minutes at a stretch. Others still fuss after 5. Both are normal. If your baby is content and engaged, there’s no reason to cut a session short. If they’re upset, pick them up and try again later. The total across the day matters more than any single session.
What Your Baby Should Be Doing at 4 Months
Tummy time at this age looks very different from those first wobbly attempts as a newborn. The CDC lists pushing up onto elbows and forearms as a key 4-month milestone during tummy time. Your baby should also be holding their head steady without support and bringing their hands to their mouth. You may notice them swinging at toys placed nearby or turning their head to track objects and sounds.
These movements build the muscles in the neck, shoulders, back, and core that your baby will need for rolling, sitting, and eventually crawling. If your 4-month-old isn’t yet pushing up on their forearms or still can’t hold their head steady when you hold them upright, that’s worth mentioning at your next pediatrician visit. Babies develop on their own timeline, but those particular skills are expected benchmarks for this age.
Why Tummy Time Matters
Since the early 1990s, parents have been advised to place babies on their backs to sleep, which significantly reduced the rate of sleep-related infant deaths. The tradeoff is that babies now spend far more time on their backs, which means they get less natural practice using the muscles along the front of their body. Tummy time fills that gap during waking hours.
The motor benefits are well supported: time spent on the belly strengthens the muscles babies need for lifting their heads, rolling over, and crawling. It also gives babies a different visual perspective of the world, which supports early sensory development. You’ll sometimes hear that tummy time prevents flat spots on the back of the head (positional plagiocephaly), but the research on that specific claim is actually limited. A 2023 review found that while tummy time clearly benefits motor development, the evidence for preventing flat spots isn’t strong. That doesn’t mean it’s unhelpful, just that the strongest reason to do it is for your baby’s strength and movement skills.
Making Tummy Time Easier
Place your baby on a firm, flat surface like a play mat or blanket on the floor. Soft surfaces like beds or couches aren’t ideal because they don’t give your baby a stable base to push against, and they introduce a suffocation risk if the baby tires and drops their face down. Get down on the floor at your baby’s eye level. Babies are far more likely to stay engaged when they can see your face or interact with a toy placed just within reach.
Timing matters. Tummy time works best when your baby is awake, alert, and not hungry. If your baby has reflux, wait at least 30 minutes after a feeding before placing them on their belly. Putting a baby with a full stomach facedown is a reliable way to trigger spit-up and create a negative association with the position.
If your baby resists tummy time, try shorter but more frequent sessions. You can also start with your baby lying chest-to-chest on you while you recline, which still counts and feels less intimidating for babies who hate the floor. Another option is draping your baby belly-down across your lap. As they get more comfortable, transition to floor time where they have room to move freely.
Tummy Time Is Only for Awake Hours
Tummy time is strictly a supervised, awake activity. The AAP guidelines are clear: babies should always be placed on their backs to sleep, in their own sleep space, on a firm flat mattress with no loose blankets, pillows, or stuffed toys. Never let your baby fall asleep on their stomach during tummy time. If they doze off, roll them onto their back right away.
The simplest routine is to build tummy time into your baby’s regular wake windows. After a diaper change, after a nap, or during playtime on the floor are all natural opportunities. By spreading it across the day, you’ll reach that 20 to 40 minute daily target without either of you getting frustrated by one long session.