Well, it's tough to say...

I think you should lift weights for sure, four times a week. Two times a week do 2 sets of 8 reps, with heavy weights on. And, the other two times do light weights on the bar, but 3 sets of 10 reps. That should help you build a balanced body, and it won't mess up your shot, plus, you should gain some muscle and pounds.

And, just eat a lot more proteins, and try not to eat too much fats. I think you should a lot of beef and bigger portions, 6 times a day.