The Olympic diver is here to help you keep fit this January.

In his latest YouTube video, Tom Daley reveals the secret to maintaining his impressive physique – a glass of lemon water.

He a glass of it every morning helps keeps him in shape – calling it “quick, easy and simple” way to improve your health.

The Olympian also adds that keeping lemons in the bathroom ensure that he can do it first thing in the morning without forgetting.

Daley – now topless, for reasons we may not understand but greatly appreciate – later moves on to show viewers how easy it is to make lemon water, although hasn’t anybody ever told Tom not to play with his food?

The athlete later goes on to list the benefits of lemon water – it’s good for the immune system, it’s cleansing, it’s good for healthy skin, it helps you lose weight and it gives you energy.

He then promises to upload more videos in the coming, to the delight of his many fans.

The Olympic diver announced his engagement last year to his screenwriter partner –  Dustin Lance Black –  who was behind Oscar-winning gay rights biopic Milk.

The pair opened up about their lives together in a joint interview with Out magazine recently – with Daley revealing how he kept his planned proposal from being discovered.

Black – whose previous plans to propose on Tower Bridge were thwarted by TV cameras – explained: “I go into the bathroom to get ready for bed and come out in my underwear, and that’s when he drops down on one knee and proposes to me.”

Daley explained: “I had the ring box in my underwear, and when he came out of the bathroom, I just went down on my knee and proposed.

“Then he ran off to the bathroom to get his rings, and he had this whole speech prepared, but he’s a writer so his was quite extravagant.

“But looking back, all I can remember is being completely overwhelmed, like, Oh my God, we’re now engaged.”

Watch Daley’s new fitness video below: