Katie Price is planning to embark on a 300-mile charity bike ride.

The former glamour model undertook a 25-mile ride at the Sainsbury's Sport Relief Games at the Queen Elizabeth Olympic Park in Stratford, East London yesterday (23.03.14) and enjoyed the challenge so much, she has her sights set on a tougher task in the future.

She tweeted: ''really enjoyed 25 miles today for sport relief! my next challenge for charity is a 300 mile bike ride!! (sic)''

However, Katie - who was joined at the Sport Relief games by husband Kieran Hayler - may find her next trek tough on her as the 35-year-old beauty admitted to feeling some discomfort after yesterday's ride.

She tweeted: ''Woo my bike was amazing from @chainreaction I did and completed 25 mile bike ride for sports relief woooo sore bum lol (sic)''.

Katie - who has children Harvey, 11, Junior, eight, and Princess, six, from previous relationships and Jett, seven months, with Kieran - is no stranger to sporting challenges for charity.

In 2009, then-husband Peter Andre had to help her over the finish line at the London marathon - which she completed in seven hours and eleven minutes - as she experienced problems with her knees during that race.

She also had places in the same 26-mile event the following two years but had to pull out because of the ongoing problems with her joints.

In 2012, the 35-year-old star completed the Brighton half marathon in aid of The Vision in 2012, but was left in agony when both knees ''gave out'' during the race.