How to sleep in a heatwave: 13 clever tips and cooling essentials

Too hot to sleep? From temperature-regulating mattress toppers to a fan quiet enough for the bedroom, here are our best buys for sweaty nights – and what to avoid

Is it true that … we should eat every two to three hours to boost our metabolism?

Yes, digesting food requires energy, but you need to do more than snack for a meaningful impact

Is it unhealthy to suppress sweat?

Sweat has important functions, including cooling you down when it’s hot outside. Here’s what science says about using antiperspirants and deodorants

Roll up, roll up! Older generation find joy and fearlessness in circus

Juggling, trapeze and hula hoop classes for over-50s are taking off as people rediscover their inner child and tap into health benefits

Don’t tell me it’s wrong to hold a grudge. I’m making the world a better place, one petty boycott at a time

Forgive and forget? I haven’t set foot in my local bakery since I was belittled by the woman behind the counter, writes Polly Hudson

What would our lives look like if we no longer had to work? As a thought experiment, I tried to imagine

The abundance that AI promises to deliver represents an enormous and radical opportunity – a chance to reconnect with the ancient project of how to live

Hormones on the brain? Everything you need to know about HRT, testosterone, melatonin and more

Cortisol is bad. Testosterone makes you aggressive. Melatonin helps you sleep. Experts bust common hormone myths

I’m putting creatine in my breakfast – but will it make me stronger, healthier and happier?

I am having the world’s most basic midlife crisis. I have not found God. I have found a fitness supplement that was once the preserve of male bodybuilders

I tested 53 water bottles to find the best for leaks, looks and sustainability: here are my favourites

Ditched single-use plastic bottles but can’t find a good reusable one? I spent months putting dozens through their paces – these are the ones worth buying

The 27 Fourth of July sales worth browsing while you hide from the heatwave

We hand-picked the best US Fourth of July sales and deals in outdoor gear, travel and more on products we’ve actually tested ourselves