12/03/2026
Everyone knows the classic “get 8 hours of sleep”, but even when you achieve this, why do you wake up feeling unrefreshed?
Firstly, it’s not all just about quantity. It’s about deep, restorative sleep - the kind where your brain detoxes, your nervous system resets, and your body repairs itself. This is the slow wave sleep that most people are lacking.
Most people are sabotaging their sleep daily, without even realising it.
Here’s what’s wrecking your sleep quality:
☕ No caffeine after 1pm - caffeine has a half-life of 5-6 hours and a quarter-life of 9 hours, meaning it is still in your bloodstream long after you think it’s worn off. That 3pm coffee? Still 30%-40% active at bedtime, blocking adenosine receptors and preventing deep sleep cycles.
No high intensity exercise after 7pm - vigorous exercise raises cortisol (your stress hormone) and core body temperature, both of which can remain elevated for 4-6 hours. This directly opposes the drop in cortisol and temperature your body needs to fall into deep sleep.
🍽️ Final meal 2 hours before bed - digestion raises your core body temperature and redirects blood flow to your gut. Deep sleep requires your core temperature to drop by about 1°C, so eating late directly interferes with your body’s ability to enter restorative sleep stages.
📱 No screens 90 minutes before bed - blue light (especially wavelengths around 480nm) suppresses melatonin production by up to 50%. Melatonin is the hormone that regulates your sleep-wake cycle, signalling to your body that it’s time to sleep. Less melatonin = lighter, more fragmented sleep.
🌡️ Sleep in a cool room (yes, cool) - your core body temperature needs to drop by approximately 1°C to initiate and maintain deep sleep. The ideal bedroom temperature is 16-19°C.
🫁 Breathwork before bed - I use breathwork (like the 4-6 breath - inhale gently for 4, exhale gently for 6) to help me relax and calm down before sleep. That longer exhale activates your vagus nerve and signals your parasympathetic nervous system to down regulate from stress mode to rest mode. It’s one of the fastest ways to prepare your body for deep sleep.
Continued in caption ⬇️