Losing 10-15 pounds in 5 weeks isn't that hard tbh.
Calculate your caloric maintenance. Subtract 800ish. Do gym sessions with HIIT daily.
Track all the calories you consume.
Though if you are honestly 12% bodyfat (You can see all your abs yes? you can at 12%), it's actually going to be more difficult than that. 15 pounds at 12% bodyfat is really significant. Most people vastly underestimate their bodyfat though.
IIFYM.com has a pretty darn good calculator.
Losing 10-15 pounds in 5 weeks isn't that hard tbh.
Calculate your caloric maintenance. Subtract 800ish. Do gym sessions with HIIT daily.
Track all the calories you consume.
Though if you are honestly 12% bodyfat (You can see all your abs yes? you can at 12%), it's actually going to be more difficult than that. 15 pounds at 12% bodyfat is really significant. Most people vastly underestimate their bodyfat though.
IIFYM.com has a pretty darn good calculator.
Should definitely be able to see your abs at 12%. I'm at ~15% and I can see my abs. I don't look like I belong in a Spartan movie or anything but they are visible.
Two idea ways to do Cardio:
1) Do it first thing in the morning while you're fasted (ie Before eating). You can also do weight training this way for the same result. Sip on a BCAA while training (zero calories).
2) Do about 15 mins of Low intensity training after weight training to burn off a bit more fat. Most idea would do fasted weight training, then finish it off with about 15 mins of cardio.
My schedule doesn't allow me to do this (deployed in Afghanistan), here's what I'm currently doing, and then what I'll be switching to next week.
Current:
S: fasted cardio in the morning, chest (weights) in the afternoon
M: fasted cardio, Back (weights) in the afternoon
T: fasted cardio, Shoulder in the afternoon
W: fasted cardio, Arms (bi's & tri's) afternoon
T: fasted cardio, Legs afternoon
F: rest
Sa: fasted cardio, Arms again in the afternoon
I'm getting a bit burned out with this so I'm switching to...
Friday: fasted cardio, Upper body (a mix of all upper body)
Saturday: Lower body
Sunday: rest
Monday: fasted cardio, Push (all type of push exercises, chest, tri's etc...)
Tuesday: Pull exercise
Wednesday: fasted cardio, legs
Thursday: rest
I maybe tweak this a bit and add more (light) cardio at the end of my weight training.
Diet:
Breakfast: 5 hardboiled egg whites, 1 chkn breast, 1 banana
Mid morning snack: 1 banana
Lunch: 2 grilled chkn breast (if available), veggies
Mid afternoon snack: Protein shake
Dinner (after weight training): 2 grilled chkn breast (if available), veggies
During my workout I'll be sipping on a mix of xTend BCAA and ON Creatine Mono.