A Romulan with blood on his face. Nanoprobes assimilating blood cells. Blood is the circulatory fluid that runs through most corporeal lifeforms in the universe. Its primary function is to carry nutrients and respiratory gases to cells and to remove waste products.
Muscle is more metabolically active than fat, and building muscle can help increase your metabolism (36, 37, 38, 39). This means you will burn more calories each day, even at rest (40). Lifting weights will also help you retain muscle and combat the drop in metabolism that can occur during weight loss (41, 42, 43, 44).
Tip #1: Build muscle mass. When you increase your muscle mass, you boost your resting metabolism -- and that makes your body burn more calories, says Heimburger. Some examples: using hand weights to do bicep curls, using weight machines at a gym, even doing specific calisthenics like push-ups and abdominal crunches.