If you asked people what they need to do to get fitter and healthier, most would say exercise more or eat better. Sleep is rarely mentioned, yet it’s probably the single most powerful tool we have for improving our health, energy, and longevity. The problem is that we treat sleep as optional, something we squeeze in after everything else. But poor sleep affects every system in the body, and the long-term consequences can be serious.
Most adults need somewhere between 6 and 9 hours of good-quality sleep a night. Not just on weekends but consistently. Research shows that regularly getting less than this increases the risk of heart disease, weight gain, type 2 diabetes, and even early cognitive decline.
It also makes it much harder to stay motivated with exercise or resist unhealthy food choices. In fact, one study showed that sleeping poorly for just a few nights can make people eat hundreds of extra calories without realising it. I certainly notice more biscuits being eaten when I’ve not had enough sleep!
Sleep is where the body repairs itself. Muscles rebuild, hormones rebalance, and the brain clears out waste products linked to dementia. When you cut sleep short, you interrupt all of these processes, and over time this shows up in how you feel: low energy, irritability, lack of focus, and constant cravings.
The good news is that sleep is one of the easiest things to improve, and it doesn’t cost a penny. Although I do recognise that it isn’t always easy, or possible, to do this, especially if you have young children or work shift.
Here are my top tips:
Set a regular bedtime: your body loves routine, going to bed and waking up at the same time helps regulate your internal clock.
Reduce screen time in the hour before bed: phones and tablets keep your brain stimulated and their blue light suppresses melatonin, the hormone that makes you sleepy.
Keep your bedroom cool and dark: the ideal temperature for sleep is around 18°C. Darkness helps your body recognise it’s time to wind down.
Avoid caffeine late in the day: caffeine has a half-life of around six hours, which means that 4pm coffee is still buzzing in your system at 10pm.
Wind down properly: a warm shower, reading, stretching, or gentle breathing exercises can all help shift your body into “sleep mode”.
Improving your sleep won’t just make you feel better tomorrow, it will make a difference to your long-term health, your fitness, your mood, and even how well you age.