As a new mum or dad in Australia, you've likely spent your fair share of late nights peering over the edge of the cot, watching your bub sleep. Sometimes, what you see is a bit of a surprise! When babies throw their legs up and down as they sleep, it can leave parents feeling completely baffled. These movements can range from subtle leg lifts to enthusiastic kicking that might even wake the little one up. While it might look like a mini-workout, once you understand the science and the common "Aussie bub" causes behind it, you can finally relax and enjoy your own "me-time" with a cuppa.
The short answer is a resounding yes—it is perfectly normal for Aussie babies to kick, lift, or thrash their legs while they’re in dreamland. Newborns and young infants are still developing the neural pathways required to master their limbs. In the early months, their brains and bodies are working hard to regulate sleep cycles and muscle coordination.
Unlike us adults, who experience muscle atonia (a kind of temporary paralysis) during REM sleep, babies have a much more active nervous system. Their version of REM sleep involves plenty of movement, facial expressions, and those adorable (if slightly loud) leg thrashes. This is often why you’ll see your little one performing what looks like a floor routine while they are fast asleep.
According to paediatric experts, babies spend approximately $50\%$ of their total sleep time in "active sleep" (the infant equivalent of REM), whereas adults only spend about $20-25\%$. During this active phase, you might notice your bub:
These movements aren't just natural; they are actually helpful for your baby’s growth, helping them build the muscle strength they’ll need for crawling around the local park later on.
If your bub is kicking their legs specifically while trying to drift off—rather than when they are already deep in sleep—it might be a slightly different story. Here’s what your little one might be trying to tell you:
Now that we’ve established it’s normal, let’s look at the specific reasons why those little legs keep flying up:
One of the most common reasons Aussie mums see their babies lifting legs is to relieve pressure from gas or "wind." By pulling their legs up toward their tummy, babies are instinctively positioning themselves to help move gas bubbles through their developing digestive systems.
Because a newborn’s gut is still maturing, they are prone to wind buildup. That satisfied sigh or "burp" you hear after a series of leg lifts is often the result of them successfully moving that discomfort along. If your bub seems particularly restless due to wind, you might find that gentle tummy massage or "bicycle legs" during their awake time helps settle them before the next nap.
While a baby swing can be a great tool for soothing a fussy baby during the day, remember to always transition your bub to a flat, safe sleep surface for their actual naps to follow SIDS safety advice. The gentle motion of a swing can help calm a bub struggling with wind, giving your arms a much-needed break after a long day.
Those leg lifts are often a sign that your bub’s brain is "wiring up" correctly:
For some infants, especially those who might be more sensitive to their surroundings, leg movements are a form of sensory feedback. The feeling of their legs hitting the mattress provides "proprioceptive input," which can actually be quite grounding and calming for a baby trying to navigate sleep cycle transitions.
Are they about to crawl? Are they trying to roll over? As bubs approach these big Australian milestones, you’ll likely see an uptick in nighttime activity. This "sleep practice" is a vital part of their physical development.
While normal, constant kicking can sometimes lead to a very "un-rested" parent. Here are some strategies to help settle those legs:
If you think wind is the culprit, try these Aussie-approved tips:
A calm environment helps minimise the external stimuli that might trigger extra thrashing:
What your baby wears can affect how much they wriggle. Look for soft, breathable cotton or bamboo fabrics that allow for movement without being restrictive. Avoid anything with scratchy seams or tight elastic that might irritate their skin and cause more kicking. Ensure the sheets are fitted tightly to the mattress so they don't bunch up during all that activity.
Beyond managing leg movements, these tips will help improve the overall sleep quality for your whole family:
Bubs love a routine. It signals to their brain that the day's adventures are over. Start your wind-down about 30-45 minutes before bedtime with a warm bath, a gentle massage with baby-safe oil, and a quiet story.
Keep the room as dark as possible using blackout blinds—perfect for those long Aussie summer evenings. A high-quality baby monitor is also a must-have, allowing you to check if that thumping sound is just a dream-kick or if bub actually needs a cuddle, without you having to walk into the room and risk waking them up.
Keep an eye out for tired signs like rubbing eyes, pulling at ears, or becoming a bit grizzly. Putting them down "drowsy but awake" can help them learn the skill of falling asleep independently, which often leads to less restless kicking later in the night.
When they start reaching the toddler stage and are more active during the day, using a sturdy baby carrier for your daily walks can ensure they get plenty of fresh air and stimulation, leading to better sleep at night.
Not necessarily. While vigorous kicking can be a sign of wind or a dirty nappy, it is most often just a normal part of their active sleep cycle. If your bub is kicking but remains asleep or settles quickly, they are likely fine. However, if the kicking is accompanied by inconsolable crying or arching of the back, it might be worth checking for reflux or wind.
Most of the time, it's nothing to worry about. You should, however, speak to your GP or paediatrician if you notice:
Normal developmental kicking usually occurs during sleep transitions, is bilateral (both legs), and doesn't seem to distress the baby. As their nervous system matures, you’ll notice these movements gradually decrease.
It’s completely natural to feel a bit worried when you see your bub thrashing about in their cot, but in the vast majority of cases, those leg lifts and kicks are just a sign of a healthy, developing baby. Whether they are processing their day, relieving a bit of wind, or practising for their future walking adventures, it's all part of the journey.
By creating a safe, comfortable sleep environment—complete with the right temperature and perhaps a soothing sound machine—you're giving your little one the best chance at a restful night. And remember, as your bub grows, their sleep will change. Soon enough, those kicks will be replaced by the pitter-patter of toddler feet heading toward your room for a morning cuddle!
To help keep your nights as peaceful as possible, keeping their breathing clear with a nasal aspirator or staying organised with a stroller organiser for those daytime outings can make all the difference in your daily routine.
Understanding your bub's sleep is a learning curve for everyone. If you're keen to learn more, check out these helpful guides:
➤ Restless Baby Sleep: Why Does My Baby Toss and Turn at Night
➤ Why Do Newborns Spit Up During Sleep? What Parents Need to Know
➤ Why Does My Toddler Twitch in Sleep? Causes, Solutions & Warning Signs
➤ What to Do If Baby Won’t Sleep on Back: Common Reasons and Solutions
➤ Unveil Infant Rapid Breathing While Sleeping
The information provided in this article is for general informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider regarding any medical condition. Momcozy is not responsible for any consequences arising from the use of this content.
