whenver i do burnouts, i will get stomach cramps at 150-200 reps..though my legs do not get tired, the pain in my stomach doesnt let me contnue. its very annoying. any1 know how to fix the problem? thx

__________________

Age: 16
Height: 5'11"
Standing Reach: 7'7"
Weight: 140
Standing vertical: 20"
Running vertical: 28"


Goal:
35" RV before end of summer