re: Weight loss and staying in shape, it isn't that difficult.

72 hours fasting, 24-36 hours eating keto. You lift using abbreviated reverse pyramid training. As far as exercise other than lifting, walks only.

You do this until you reach your goal body fat %. Doesn't usually take more than 4-6 weeks. If it's going to take longer then that, I would suggest a 2 week break using keto at maintenance with carbs twice a week.

Repeat. This should be on the fitness board though.