you are NOT going to be depleted from lifting weights at the gym lol..  i always find it hilarious how people think that.  go run a half marathon and then when you quit 1/4 of the way through you will know what really being depleted is! 
if you are trying to lose weight let the wave run longer.  don't eat for a bit. 
that is 'extreme' but it will help you lose more weight..  
the worst thing you can do is workout, burn 300 calories.. then go to chipotle and get a burrito that is 1000 calories with a soda and chips.  you just ruined your entire workout