The world of boxing had never before known a pair of brothers the likes of Vitali and Wladimir Klitschko. Together, the young men – still in their 30s – share five boxing heavyweight titles between them, plus Wladimir's Olympic gold medal.

Their hard-fought victories at every global boxing competition are famous already. What's lesser known is how these fighters succeed outside of the ring. Vitali is a political leader in their home country, Ukraine, and an ambassador to UNESCO along with Wladimir. They’ve both done good works to build schools and hospitals in Africa and South America and work with the Laureus Sport for Good Foundation for underprivileged children. When you add that they both hold doctorates in sport science, it should make you shrink further in their muscle-bound shadows.

A new documentary by Sebastian Denhardt shows what built these two kind-hearted fighters – from their childhood in Ukraine, their first KOs, to the sweat and blood poured into their training. AirTalk welcomes the Klitschko brothers for a studio interview.

Guests:

Vitali Klitschko, Heavyweight boxing champion of the world

Wladimir Klitschko, Heavyweight boxing champion of the world