https://youtu.be/6GIErLWuIow Doing sit-ups on the floor or on a slant board is not a problem for most experienced lifters, but try doing them ha...
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December 22, 2013 | John Paul Catanzaro
https://youtu.be/6GIErLWuIow Doing sit-ups on the floor or on a slant board is not a problem for most experienced lifters, but try doing them ha...
Read More