One of the best ways to trim your legs and tone your butt is doing plyometrics. Adding in some chest for a upper body workout adds variety. See the full video for your complete workout.
>20 Jump squats
>20 Incline pushups
>20 Bulgarian split squats - each leg
>20 Decline pushups
Repeat Circuit 3 times
Always warm up for 5-10 minutes before starting any workout. Running one full lap on the track is a great warm up before starting this workout.