Exercise when you're exhausted: moving through newborn sleep loss

Some days with a new baby, the idea of exercise feels almost funny. You might be awake every two hours, eating with one hand, and running on a kind of tiredness you didn't know existed. This guide is for those days. It covers how sleep loss affects movement, why rest is always a valid choice, gentle options for when you do want to move, and how to tell when exhaustion might be something more.

Is it okay to exercise when I'm sleep-deprived?

New-parent tiredness isn't only about the number of hours. A study that tracked mothers' sleep with wrist monitors from two to sixteen weeks after birth found that night-time sleep averaged about seven hours, more than the researchers expected, but it was highly fragmented and inefficient, similar to sleep disorders that break sleep into pieces. The fragmentation eased gradually over those months.^[1] That helps explain why seven broken hours can leave you feeling like you've had three.

Sleep and activity affect each other in both directions. Exercise is linked with better sleep, but poor sleep can also make people less active the next day.^[2] So if you feel less like moving when you're exhausted, that isn't a lack of willpower. It's your body doing what tired bodies do.

The postnatal running guideline describes sleep as key for recovery from both physical and psychological stress, and notes that in athletes, sleep loss is linked with a higher risk of injury.^[3] That's a good reason to keep effort light when sleep is short. On days when a check-in says "barely slept", Eggsports caps the effort at moderate and leans towards the gentlest options.

Is rest a valid choice?

There is no streak to protect and nothing to make up for. The guideline suggests that daytime naps timed with your baby's sleep can extend total sleep and reduce the effects of sleep deprivation, and that a calm routine before sleep helps when more hours aren't possible.^[3]

Restful options that still feel like caring for your body:

• A nap. If you have the chance to sleep, take it.
• Slow breathing. A few minutes of breathing with a long, easy exhale can help you settle. Try the box breathing timer.
• Lying with your legs up. Lie on your back or side with your calves resting on the sofa and let your breath slow down.
• A few pelvic floor squeezes. Lying down is a comfortable position for them, and they ask very little of you.

What kind of movement helps when I'm exhausted?

You don't need long sessions for movement to help. In a randomised trial, 140 new mothers were assigned either to home aerobic exercise sessions of 15 minutes, at least three times a week for three months, or to no programme. The exercise group reported significantly less fatigue and stress after four weeks, and these benefits lasted to twelve weeks, along with fewer physical symptoms disrupting their sleep.^[4] It was a pilot study, so the results need confirming, but it suggests that small doses count.

The World Health Organization agrees that some physical activity is better than none, that replacing time spent sitting with activity of any intensity, including light activity, brings health benefits, and that it's fine to start small and build up gradually.^[5]

Whatever your energy, stay within the stage you're at. The weeks since birth, your type of birth and your pelvic floor symptoms all still apply, and our postpartum readiness check can help you find that stage.

Can exercise help with low mood after birth?

A meta-analysis of twelve studies found that physical activity programmes during pregnancy and after birth reduced postpartum depressive symptoms, with a larger effect in women who already met criteria for depressive symptoms than in those who didn't. Its authors concluded that exercise is a safe way to support psychological wellbeing and reduce these symptoms.^[6]

Another review, of eighteen trials, found smaller effects and rated the quality of evidence as low. Its authors suggest exercise could become an alternative approach for preventing major depression in women with milder symptoms, but call for better trials before relying on it.^[7]

The honest summary: moving your body may lift your mood a little. It is not a test you have to pass, and it is not a substitute for help when you need it.

How do I know if it's more than tiredness?

Perinatal depression, which covers depression during pregnancy and in the first year after birth, is one of the most common medical complications of this time, affecting about one in seven women.^[8] Feeling down, anxious or irritable in the first days is often called the baby blues, and it usually goes away within two weeks of the birth. If those feelings last longer or get worse, it's time to seek help.^[9]

Signs of postnatal depression include:^[9]

• Low mood, or finding it hard to enjoy anything
• Feeling hopeless, or that you can't cope
• Feeling guilty or worthless, or that you're a bad parent
• Feeling anxious or fearful, or worrying all the time
• Feeling restless or irritable
• Difficulty sleeping, even when you have the chance to rest
• Difficulty concentrating or making decisions
• Difficult feelings about your baby, or finding it hard to bond
• Thoughts of suicide, or of harming yourself or your baby

You don't need to have all of these to ask for support. Speak to your GP, family doctor, midwife or health visitor if you think you might have postnatal depression, even if you only recognise some of the signs.^[9]

A much rarer condition, postpartum psychosis, affects around 1 in 1,000 mothers. Symptoms usually start suddenly within the first two weeks and can include seeing or hearing things that aren't there, beliefs that don't match reality, a very high or rapidly changing mood, and confusion. It should be treated as a medical emergency.^[10]

If you have thoughts of harming yourself or your baby, or you are worried someone is in immediate danger, call your local emergency number now.

However you are sleeping, be as kind to yourself as you would be to a friend in your place. When you feel ready for more, our guide to when you can exercise after birth shows the next step, and our complete guide to exercise after birth brings everything together. If you're hoping to run again, read about running after pregnancy and how sleep fits into that plan.