Published Thursday, 19 September 2013
The brothers, who won silver at London 2012, struggled to keep up under the blazing African sun as they helped 13-year-old Jaellet and Doreen carry water 6km to an isolated village.
It's a four-hour walk which the girls have to take every day to keep their families alive.
"If they don't get water they don't survive and they don't get to cook their food, there's nothing to cook their food in," Richard Chambers told UTV.
"You go down and collect they water and carry it up. You've got this sloshing about in a jerry can and it's incredibly difficult - and for us to keep up was a challenge."
Peter and Richard were in Uganda for the launch of a project by the Christian charity Tearfund NI, which hopes to bring water to this remote part of Africa.
Tim Magowan from the organisation urged anyone who can to join their campaign.
He explained: "We've helped over 300,000 people in that area access clean water - that's an amazing story of change, but there's 200,000 still to go.
"We invite the Northern Irish public to help us and the support the Chambers brothers in bringing life and change to girls like those they met out there."
© UTV News