If he were to alter his activity record in any way, he would have to recalculate the amount of energy he is burning. Joe must maintain that energy balance or he will either begin to gain or lose weight over the long run. Gaining Weight To gain weight, Joe must now consume more than the 3,534 kcals. He can do this by adding another meal to his day, snack once or twice a day, or may try taking a supplement for more calories. He should still eat healthy foods, but he might want to increase his fat intake just a little.
Fats offer the most energy per serving.
His snacks should also be healthy and full of CHO for added energy. I would say that Joe should do a little research before trying a supplement. He should find out which product is most effective for the gains he is trying to make. Joe just needs to consume more calories, but he must also continue to exercise. He might also begin some kind of weight training program.