The sleep science all runners need to know - Women's Running

The sleep science all runners need to know

Read Time:   |  November 1, 2021

We love that extra hour of sleep when the clocks go back. But if you're still feeling unrested, it might be to do with your sleep. We find out what we can do to optimise our sleep and reap the rewards on our runs

Why is sleep so important for runners?

Sleep is one of the main components of recovery and as such should be prioritised just as highly as training, fuelling, and hydrating. Lack of quality sleep can lead to impaired cognitive function (casually known as ‘brain fog’), slower reaction times, reduced recovery, and even hormone imbalances.

Running coach Alex Parren is passionate about helping us improve our sleep and notice the difference when we run. Here Alex’s five tips for optimising your sleep this autumn to maximise your training gains and improve your overall lifestyle and wellbeing.

1. Sort out your sleep schedule

Having a set bedtime isn’t just for kids! Going to bed and waking up at the same time every day – even at the weekend – is scientifically associated with a healthier pattern of lifestyle behaviours. In a 2013 study, participants who had bedtimes that varied by more than 30 minutes from day to day were associated with more frequent insufficient sleep and a less healthy pattern of lifestyle.

Try to find a bedtime and a wake-up time that work for your lifestyle schedule on both weekdays and weekends and stick to it every day. You may even find you feel better forgoing your weekend lie-in and end up with more energy throughout the day.

2. Cool down your sleeping space

According to scientists, the thermal environment (i.e. the temperature of your bedroom) is one of the most important factors that can affect human sleep. Our core body temperature naturally decreases as night draws in and this signals to our brain that it’s time to go to sleep.

A 2012 study found that heat exposure increases wakefulness and decreases slow wave sleep and rapid eye movement (REM) sleep, meaning that if your bedroom is too hot, you will have a less restful night’s sleep.

Thankfully, now that it’s autumn, the warm summer nights are behind us and we can snuggle up comfortably in bed. If you start to have the heating on during the day, be mindful to turn it right down in the hours before you go to bed, or alternatively turn off the radiator in your bedroom so that it stays at a cooler temperature.

3. Get savvy to your smartphone

We’ve all heard that our phones affect our sleep, but if you’re like us, you don’t really know why. Electronic devices emit blue light which can suppress melatonin production. Melatonin is the sleep hormone, which the body produces just after it gets dark, peaking in the early hours of the morning and reducing during daylight hours.

Blue light isn’t a new invention and isn’t restricted to electronic devices. In fact, we have natural exposure to blue light from the sun. It’s a natural light that stimulates parts of the brain that make us feel alert, elevating our body temperature and heart rate. During the day, blue light can improve performance and attention, which is why it’s so important to spend time outdoors during the day. However, if you prolong your exposure to blue light by staring at a screen after the sun has set, you will interrupt your body’s natural sleep rhythm and disturb your sleep pattern.

Many smartphones now have the function to automatically switch from blue light once the sun has set, so if you are going to use your phone after dark, make sure this function is turned on.

4. Take a look at what you eat and drink

As a runner, it’s quite possible you drink coffee or take some sort of caffeine supplement to boost your training. While it’s certainly true there are short-term performance benefits to caffeine consumption, overuse can lead to insomnia and interrupted sleep patterns. If you’re someone who relies on caffeine to get you through the day or to get you through tough training sessions, be strategic with your intake so that you can benefit from the performance enhancement without affecting your sleep.

You may think that only drinking coffee several hours before bedtime won’t affect your sleep, but you may be wrong. One 2013 study set out to compare the disruptive sleep effects of a fixed dose of caffeine (400 mg) administered at 0, 3, and 6 hours prior to the participants’ bedtime. You would think that taking caffeine 6 hours before bed wouldn’t affect sleep as much as taking it right before going to bed, however the results found that the moderate dose of caffeine at bedtime, 3 hours prior to bedtime, and 6 hours prior to bedtime each had significant effects on sleep disturbance.

Be mindful of what you’re putting into your body in the hours before you go to bed and avoid drinking coffee in the afternoon.

5. Research some supplements

If you’ve done everything you can to improve your sleep but are still struggling with fatigue throughout the day and restlessness at night, taking a sleep supplement can help. I recommend the PhD Reset range, which contains active ingredients proven to improve the quality of your sleep. They support night-time muscle maintenance and recovery whilst also supporting deep restful sleep.

For some people, optimising their sleep space and reducing disturbances in the night isn’t something they can control, so knowing you can rely on a supplement to support you is a fantastic option and could even reduce the anxiety associated with not being able to sleep well.

About the expert

Alex Parren is a qualified personal trainer, nutritionist, and running coach with 7 years experience in the fitness industry. With a background in both powerlifting and Olympic lifting, Alex is now a keen ultra runner and can usually be found exploring the trails in the south of England.

Written by

Kate Sellers

Kate Sellers

Loves a muddy trail run with her dog in tow

Meet the team

We use cookies to give you a better experience on By continuing to use our site, you are agreeing to the use of cookies as set in our Cookie Policy.

OK, got it