Increase your metabolism. The quintessential buzz phrase tumbled around as the easy weight-loss solution. But the fast fact is there’s no definitive proof that we can significantly, and lastingly, change how our body processes food for energy or heat—the crux of metabolism. That’s because much of what defines your metabolism is outside of your control—age, genetics, gender. Your body’s basal metabolic rate, estimated as resting metabolic rate (RMR), accounts for 70 percent of your metabolism. It’s the amount of energy your body burns to keep itself functioning while at rest. This is what people connect to when they talk about boosting up their metabolism. Besides getting more physical activity during your day—which accounts for 20 to 25 percent of your metabolism, there are just a few intrusions that might boost your metabolic rate long term. 4 Ways to Speed Up Metabolism 1. Build and maintain body muscle mass “People who…