SINGAPORE - Ultramarathoners Lim Nghee Huat and Yong Yuen Cheng started on their second leg of 50km at 8.30am on Friday morning, supported by staff from the Institute of Technical Education (ITE), non-profit group Heartware Network and friends.

The duo are attempting to run 50km - longer than a marathon at 42.2km - daily for 50 days in a row to celebrate Singapore's 50th birthday and pay tribute to its founding fathers and pioneers.

Staff and students from the ITE will take turns to run alongside them in the effort called Go50: A Nation In Motion.

The two ultramarathoners, visibly more tanned after their first day, were pumped for their second leg which started at Marina Barrage and will pass East Coast and Upper Changi.

"Yesterday's route had a lot of narrow pathways and elevation. Hopefully, today's route will be easier," said Mr Lim, Mediacorp Chinese current affairs editor.

"My leg muscles feel a little stiff, but other than that, I am okay," said Mr Yong.

The first 50km was little more than weekend training for both Mr Lim and Mr Yong, who run ultramarathons of more than 200km. They finished it in six hours and 13 minutes yesterday.

But the heat was a challenge as it got "really hot" after 10.30am, the runners said.

Support staff, including another ultramarathoner Gerrard Lim, carried sprinklers to shower water on them to cool them down.

Both Mr Lim and Mr Yong also had special ultramarathon gear that deflects radiated heat.

Although they had energy gels and bananas throughout yesterday's run, they were delighted to see bowls of mee pok and bee hoon from ITE after .

After the run, the first thing Mr Yong did was to shower and jump into the ITE pool to cool down. Mr Lim went to his massage therapist in Ang Mo Kio to get an hour-long full body massage.

The runners will be guided by Aetos Auxiliary Police throughout their runs to ensure their safety on the roads.