Introverts are often mellower than extroverts, but this doesn’t mean they don’t like sports or more active activities. For introverts, being “rowdy” is not something that comes easily, and being in large groups of rambunctious people can feel pretty overwhelming, adding another energy-depleting aspect to them.
Source: What does it mean to be an introvert? @ ReachOut.com: Get through tough times
image by maxmann under CC0 license