Andrew Flintoff believes his career as an England all-rounder is threatened because he is bowling too much.
The Lancashire star suffered from a groin niggle in the final Test against Sri Lanka.
He has had groin problems in the past and believes over-bowling is the cause.
Flintoff said: "It is a worry because a pattern seems to be emerging that if I do bowl a lot of overs in a short space of time, my body suffers."
He was the only pace bowler to play in all three back-to-back Tests, which England lost 1-0.
Flintoff bowled 97 overs and scored 143 runs before his body finally gave up on him.