My question is what I would consider pretty basic. I'm sure I will hear that I need to be doing the 5/3/1 program or something else. Anyway I'm doing a three day split program and on tuesday and thursday I work abs, calves, and hamstrings. I am wondering if I should be eating the same amount of calories everyday that I work out. Right now I eat 3500 calories on Monday, Wednesday, & Friday. On Tuesday and Thursday I eat around 2000 calories. I'm 5'8" tall currently weigh 155 and my goal is to gain approximately 20 lbs. Thanks in advance.