To lose fat you need both a caloric deficit and hormonal balance. To lose stubborn fat, particularly stubborn belly fat, you need to understand the hormones involved. In women those hormones are: insulin, cortisol, estrogen, progesterone, and testosterone. And of course the major fat burning hormones, the catecholamines.
Grilling the Meat. If you've marinated the meat in the refrigerator, take it out while the grill is heating up. Remove it from the marinade and place the London broil on the hot grill. Cook the meat for approximately 8 to 10 minutes on each side until the internal temperature reaches 130 to 135 F for medium-rare. Although the U.S. Department of Agriculture recommends cooking beef to a minimum of 145 F, cooking London broil to higher temperatures typically yields tougher meat.
The cooking method London broil involves marinating flank steak and then grilling it or broiling it. The cooked steak is then thinly sliced across the grain so that it's easier to chew. If you see a cut labeled London broil at the supermarket, it's a good candidate for this marinating and grilling cooking method. You could also use it for stews or smaller braises. London broils, flank steak, and top round steaks are all generally less expensive because they are tough and lean.