British triple-jumper Phillips Idowu broke down in tears while on a trek with children in Zambia for charity Comic Relief.
The 34-year-old, who failed to win a medal at last summer's Olympic Games, took on a five-mile walk with the youngsters, who carry out the trek on a daily basis to get to school.
"I'm an athlete who competes and comes back with a gold medal," The Sun quotes Idowu as saying. "But doing that walk, after an hour my back was aching. I asked one kid if he was OK and he said he didn't find it hard anymore.
"My life is nothing to what these kids have to endure. I was brought to tears by the talent and determination of those children who want to make their own lives better."