I guess I would say some people get instant results and some don’t. There were subtle changes that I could “feel” after about a week but it was more like I know something is different. Still didn’t know if it was a positive change or not. After about a month I knew I was liking the weight loss and had a better feeling overall but one think was causing doubts. I am a runner and my runs just sucked bigtime! I could normally go run six miles without a thought. now I needed to take walk breaks frequently. I started wondering if this WOE was going to work for me. At about the three month mark I was running up a hill and it hit me “this doesn’t suck anymore!” It was as if a switch was flipped on. I thought it is about time, I finally felt like a fat burner.
Somewhere months later I no longer felt the need to snack in the morning. I had quite the macadamia nut addiction going for awhile. Now after 17 months I feel I can occasionally skip a meal. Quite a feat for someone who got hangry if I didn’t eat every two hours.
Back to your question, yes I think you will get more energy but it will take time and build slowly. I for reasons unknown stopped exercising for a few months. I didn’t gain any weight and could maintain easily. I started to see the return of insomnia so I am easing back into running one mile to the gym to workout and running back home. The funny thing is I expected to need to insert walk breaks but didn’t need any. I like and prefer this WOE and no longer look for results or weight loss anymore. It is just the way I eat now. Good luck and stay the course it just keeps getting better and better.
Edit: BTW I am about to turn 58 and getting ready for the first ski trip in January (Copper Mountain)