Fitness guru Ricardo Macedo is running a tortuous ‘boot camp’ in the shadows of the Tower of London where those taking part go on a three-mile jog to Big Ben.

East London Advertiser: Louis Smith leaping to keep fit at Ricardo Macedo's boot campLouis Smith leaping to keep fit at Ricardo Macedo's boot camp (Image: TIM ANDERSON - 07973-118143 free usage)

The trainer to the stars was ‘engaged’ by a phone supplier to run the camp with an intensive 60 minute workout—and there’s no ‘network charge’ to take part.

“It’s aimed to get muscles exerting maximum force in as short a time as possible to increase speed and power,” Ricardo explained.

“Those taking part will need to be constantly thinking on their feet and anticipating what will come next to know the best way of moving and adapting their bodies to the urban challenge—they’ll burn 800 calories a session.”

The camp, opened by Phones 4u to market a health-tracking app with Samsung’s Galaxy S4, involves upper and core body exercises as well as Parkour, the physical discipline of moving freely over urban terrain using only the body’s own abilities through running, jumping, climbing and ‘quadrupedal’ movement.

Ricardo’s camp begins 6.30pm every Tuesday and Thursday until July 4, starting at Tower Hill with warm-up lunges, plyometric exercises, parkour movement using rocks, walls and gates, then a sprint to the Millennium Bridge for a full body blast before crossing the finishing line at Big Ben.