More muscle means you need more calories to sustain that muscle mass, and you are not as agile and fast as a human with less muscle mass is. (fitnessandpower.com)
In the real world this means less muscle soreness and quick recovery. (vespapower.com)
For example, a younger man with a lot of lean muscle mass will usually have a higher metabolism than an older woman with less muscle mass and more body fat. (wallerwellness.com)