When I am coaching this exercise, I stress on concentrating on all the muscles in the body and «feeling» them contract throughout the movement. (varietytrainer.com)
Instead of concentrating in today's work he's every time thinking about how he used to perform in the past while others are progressing. (justarsenal.com)
They don't care about your condition, they are more concentrated on what kind of person you are. (adultfriendfindernow.com)