Mark Wood says he wants to play Test cricket for England but is not sure whether his body is capable of withstanding five consecutive days of cricket.
The Durham fast-bowler has only played 10 out of 40 possible Tests for England since making his debut in 2015 and missed the Ashes series with an ankle injury.
Wood said: "Test cricket is the format that I want to play but, if you look at history, it shows that I've not been successful at doing it.
"That self-doubt, from my own point of view, is can my body withstand five-days of hard cricket. The intensity is totally different.
"Playing for Durham, you bowl 20-overs in the day and you come back the next day and feel alright. You bowl 13 in Test cricket and you're absolutely shattered.
"I am striving to prove my doubters wrong, prove it to myself too. It's easy saying it time after time but until I actually do it it's pointless. I have played that tune 45 times."
Wood was speaking ahead of the Australia Day ODI against Australia on Friday, the fourth in a five-match series that England have already won.
Liam Plunkett will miss the game with injury, meaning that one of David Willey or Tom Curran is likely to come into the team.
Wood gave his backing to both of his fellow bowlers, saying: "David struggled with a little bit of form last year but he's gone away and worked on little bits and bobs on his action.
"He's got his mojo back, swinging the ball consistently and looks really good.
"Tom, I think, is suited to one-day cricket with his slower ball and the way he gets his yorkers in. We have lads who can come in and do good jobs."