FULL FLEX: A local fitness influencer and personal trainer has admitted to only doing chin ups when lots of people are there to witness it.

“There are other exercises I can do that don’t need a crowd, but when I do my 10 chin ups, I always make sure there are plenty of onlookers,” says Mark Darby.

DBT joined the 29 year old for his daily work out at Bondi Beach outdoor gym this afternoon.

“The weather has been good lately, so there are lots of people around,” he says.

Then – just as a few more people gathered around the gym area – he quickly launched into his chin ups.

“Timing is everything,” he said, before completing his 10th chin up slowly for maximum attention.

DBT can also reveal Mark Darby also has an expensive gym membership.

“Yeah I’m a member at Fitness First which has state of the art equipment and is 100m from my home in Potts Point,” he says.

“But I much prefer to drive here to do my chin ups on a steel bar wedged between two wooden poles. It’s just a much better atmosphere.”