How to talk my girl about try best but not over her limit?

I am sorry and can't type Chinese now.

My 11 year old is in dance team first year.  Yesterday , during class, coach asked 30 students (few boys and girls) for push up (hold there) test. Whoever last three can hold longer, teacher will give them lollipop for prize.

 

My girl told me , in the last , she in one of four girls, she told me  at last she is very tired, sweating,   face red then she gave up.  After she gave up, all other girls gave up (they are older than her). 

She doesn't know the reason, after that she cried and coach comforted her. She told me she doesn't care lollipop and win. She feels body hurt, so she cried. I think there are two reasons, body hurt and she likes to win.   I told her she can try best but don't try very hard and over her body's limit. Before I always told her, she can try best but don't compare to others, each person has her own advantage. For her study too. She is very happy that teacher and coach said she did a good job sometimes.

She feel a little disappointed that if Coach didn't put her in front row during dancing show sometimes, I explained to her, every team member dance skills almost similar, it’s fair to take turn for front row.  How can I explain to her she can try best but don't take it too seriously about result/win , over her body limit?  Thank you for suggestion.