Harbir Singh, who has owned the Barefoot Doctors in Southall, Ealing, since 2011, is gearing up for the race after losing his brother to a heart attack.
An Ealing worker whose brother died from a heart attack last year has used the loss to spur on his training for the London Triathlon.
Harbir Singh, who has owned the Barefoot Doctors in Southall, Ealing, since 2011, is gearing up for the race in August this year.
The osteopath is spurred on from the heartbreaking loss of brother Jasbir, who died from a heart attack when he was working at the Natural History Museum in September 2015, aged just 34.
Since the loss Mr Sigh, from Slough, has undergone a vigorous regime of swimming, cycling and running in a bid to reach peak condition.
He said: "I was motivated by what happened to him and want to raise money.
"Every week I go for a swim, I do Park Runners every Saturday morning and I cycle to work and back as training for that part."
The cycle from his home in Slough to Southall is roughly 11 miles and take his around one hour and 10 minutes, but bringing the time down to one hour is an aim for 2016.
At the time of his brothers loss, Mr Singh weighed 74kg but now weighs 66kg, and is aiming to take his resting pulse rate from 68 beats per minute to 55.
Further motivation stems from a history of health problems in the family, which began when his dad, Raghbr, died at the age of 31 from a heart attack.
His uncle, Balbir, also died from a heart attack at the age of 51 and he cites family history as the driving force behind "transforming" his health.
All money he will be raising will go to the British Heart Foundation, and he is also considering taking part in triathlons in Paris and the USA.
Mr Singh added: "It (families history) is a big motivation to get fit, it spurs me on now that I am training.
"I am also having tests on my heart but if there's anything I can do to help then that's enough motivation for me.
"Motion is lotion and nearly every chronic disease can be positively impacted and prevented through exercise.
"I hope my actions will inspire others to transform and maintain their health and prevent heart disease."