I eat about 3000 calories a day. Im 185 lbs about 12% I do 1 24 hour fast every Monday for all of the health benefits.
I take packs of tuna, mixed nuts, berries with cream, some veggies, a protein shake, then eat whatever the wife made for dinner when I get home.
I run a 5k every Saturday morning with my boys and do an hour weight lifting session in my awesome home gym every Sunday morning. The absolute best thing you can do for your body as you get older is keep that muscle mass. Our job will break down joints faster and you will lose muscle mass faster as well as develop muscle imbalances if you don't do some balanced weight training in your personal time.