Gymnastics- Please help!

I am a competitive gymnast and i go to practice every Monday, Wednesday, Friday and sometimes Saturday from 5:00pm-9:00pm but Saturdays are from 1:00pm-4:00pm. We run 15 minutes in the beginning of every practice and do a lot of conditioning. But I have been arriving a little late because of school. (its an 1 hr drive from my house to practice)  and I am not losing as much weight as i used to. What are some things I could do to lose more weight? And also what are some ideas I could do to gain stamina, besides running?
Thank you for your help!

[19Rocketeer95]

If your conditioning constantly it may be helping out, but your diet has to change if you want to loose weight, but remember, since you're a gymnast, muscle is gained so much more than fat, and muscle weighs alot more.
Eating positively, exercising regularly and effectively managing stress will help improve your stamina

[Kat3lynn]

I will watch how I eat more often and Thank you so much!!! I really appreciate it. :)