Heavy Lifting

I am trying to get in shape for the military so I am stepping up my workouts and my lower body workout in particular. This comes at great calorie cost. Today I killed 1,900 calories in about 35 minutes of working out. I also lifted weights so there is no telling what my actual energy consumption was. My aim is too catch up my endurance and leg strength to the rest of my physique. I am hoping it works.