Usher sits in an ice tub after performing live.

The 36-year-old singer has a strict regime when he's on tour which includes taking chilly dips and doing lots of exercise in an attempt to remain in peak physical condition.

He explained: ''I'm a go-hard type. It's in my DNA.

''I physically prepare my body as if I'm a trained athlete. After the shows I sit in an ice tub and do a hot dip, cold dip, and sometimes I sit in a hyperbaric chamber to rejuvenate my energy.''

The 'Climax' singer is currently touring across the US, and insists it is vital he sticks to his routine so he doesn't appear ''lazy'' on stage when singing and performing his energetic dances.

He said: ''I have a workout regimen that I do, just to keep my body going. If you get lazy when you're onstage, it shows.''

The hunk - who has sons Usher V, six, and Navyid Ely Raymond, five, with his ex-wife, stylist Tameka Foster - also revealed he has now ditched the vegan diet which he adhered to for several years, and likes to have a drink as long as he can work off the calories afterwards.

He told The Guardian newspaper: ''Milk stout is a problem for me, man. But if I do decide to have a pint, as you would say, I have to work a little bit harder; I have to get out and run.''