how many calories in a day?

[ztirffritz]

I don't know if there is any scientific info to back this up, but in my experience when I start working out while eating less I'll actually hold steady, or even gain weight due to muscle building. After a few weeks the increased muscle mass will start to draw more energy from "reserves" and the weight will start to drop quickly. Eventually I hit some equilibrium, but with less weight and my body working more efficiently I enjoy being more active. It is somewhat cyclic.
Gain weight-->feel lethargic-->gain more weight
lose weight-->feel lethargic(but exercise anyway)-->lose weight-->feel energetic-->lose more weight…