21.   And muscle is the most metabolically active tissue.

22.   And one does sense a growing resentment among some players of the implicit message that black muscle is fine, but black judgment and leadership are somehow lacking.

23.   At no other time are your muscles able to perform as well and benefit from the exercise you are giving them than when your aerobic level is moderately elevated.

24.   Because muscle is heavier than fat, Baker can carry a few extra pounds as long as his body fat is reasonably low.

25.   Body structure and perhaps hormonal differences, Todd said, though the muscle is the same.

26.   A pulled muscle is a pulled muscle, right?

27.   Adding muscle is the involvement of Microsoft, which will trade several hundred million dollars for a stake in the combined company.

28.   All muscles are sore.

29.   But muscles are wonderfully adaptable, even older ones, and three lessons later I felt sufficiently conditioned to undertake the challenge.

30.   But my most important muscles are obviously the legs.