I am new to this site, but have read several questions and answers here that are related to this question and have found different contradictory answers. Some say that the only effect is that a larger lean muscle mass will burn more calories. Some say the extra lean mass will burn a lot more calories, other answers say that the lean muscle mass effect is small, such as only 10 calories per extra pound of lean mass per day. Some answers say that only intensive cardio exercise will increase the BMR, others claim there is no significant effect from cardio exercise.
So, please don't make just state an opinion or make general qualitative statements. How does actual quantitative research answer this question? Where are the studies and data?