okay my 2 cents:
5/3/1 is not a fat loss training program. You are adding muscle (while shedding some fat, but you didn’t do shit before so any movement is going to create fat loss) which is what that program is designed to do.
You want to lose some pounds, ditch the strength program and get on a good fat loss program. Lou Shuler/Alwyn Cosgroves new book, The New Rules for Lifting has a great fat loss section in it. AC’s Afterburn program is also pretty sweet, so there’s another option for you as well.
Also, after catching up on your earlier posts (maybe things have changed) but I did notice you were not getting enough fat’s and had too many carbs. Remember what Poliquin wrote: carbs must be earned. Looking for a good fat loss dieting program? Check out Leigh Peele’s Fat Loss Troubleshoot, Precision Nutirition or Naked Nutrition. All are great resources.
I also think that the boxing could be hampering your progress. If you go 0 carb, it will be to intense for your body because of such a high HR. You will need to NEPA the shit out of life.
Again, just my 2 cents.