Question

How many calories per day would be need to allow a one pound increase in lean body weight per week during a resistance training program>/?

Answer 1

In order to increase lean body weight by using a resistance training program by one pound a person would need to consume roughly 400-500 calories per day to make the necessary and wanted changes in their body.

Answer 2

In order to add one pound a week, you need to approximately consume 500 more calories per day.
On top of that, you need to at least eat 1 gram of protein per your body weight, gradually increase the amount of resistance in your training and limit your cardiovascular activities to the minimum.