Mark McClusky says for elite athletes today, pushing boundaries and breaking records is all about "the aggregation of marginal gains."
The members of the rock band Alabama Shakes first started playing together in high school.
Their music caught the ear of music blogger Justin Gage, and when he posted an MP3 of one of their songs, Alabama Shakes rocketed to national attention.
Now the band is up for two Grammys on Sunday: Best New Artist and Best Rock Performance, for the song “Hold On.” (See video below)
We revisit our June 2012 conversation with Alabama Shakes lead singer Brittany Howard and drummer Steve Johnson.