“If he hits a wall in the race it will be because of the exertion – the same as anyone else in the team – not because of his age.”
Last year Cracknell, who is studying a Masters degree in philosophy, wrote on Twitter that he was “honoured” to have been offered a place at Cambridge University.
He added: “I’ll need the support of my amazing family to do the course & if I go for Boat Race selection support of old heart & lungs required #nevertooold.”
Cracknell has previously competed in Amundsen Omega3 South Pole Race which involved rowing across the Atlantic Ocean and trekking across the Arabian Desert.
He has also become a successful runner, becoming the highest placed Briton ever in the Marathon des Sables in 2010 and completing the London Marathon in 2:43:12 in 2017.
In the past other older athletes have tried out for the Boat Race, including rugby player Andy Ripley, who missed getting a place on the team in 1998 when he was 50.
Last year Cambridge beat Oxford in all four races on the River Thames, including the men’s, women’s and both reserves.