I'm a 22 year old male, 140 lbs, 5'10. I lift heavy 3 days a week and eat like an animal (only clean foods though). I just started eating like this and have noticed a little body fat appearing on my abs and face. Could I do like a 30 minute jog a few days a week to counter the fat accumulation, or would that destroy my muscle and metabolism?
At your size you should focus on bulking up, don't worry if you gain a little bodyfat in the process. Most people limit their muscle gains simply because they are afraid to gain a bit of fat. It is much easier to lose fat then it is to build muscle. Anyone can get lean within 6 months of dieting (unless they are extremely fat to begin with). But it takes several years of hard training to build a thick muscular physique.
This year I bulked up to my heaviest bodyweight ever 240 lbs. at 5'7. Yes, I put some extra fat on in the process. But my size, strength, and muscle thickness went through the roof. I have been dieting now for the past few months getting ready for a bodybuilding contest that is coming up on Dec. 4. I am currently 205 lbs. and 6% bodyfat. I plan on weighing in at 195 lbs. ripped at the bodybuilding contest.
The only way to get big and muscular is to bulk up and gain as much size and strength as possible. Then diet down to lose any extra bodyfat that you gained in the process. You can't stay lean and get big. It just doesn't work that way.
I suggest that over the winter you focus on bulking up and get your bodyweight up to about 170 lbs. then in the spring you can start dieting and doing more cardio to get lean and cut for the summer. Most people like to cycle their training this way because everyone wants to be lean and look good for the summer time.