Lower Back Exercise Guides - Photos and Instructions For Big Lats
Your
back is characterized by three smaller muscles: latisimus dorsi,
rhomboids (upper/middle back), and erector spinae (lower back).
These three muscles, along with smaller supporting muscles deep
beneath the skin's surface, play a huge role in almost everything
you do, from swinging a golf club to sitting at the dinner table.
Erector Spinae: Runs along the lower part of the spine, hereafter
referred to as the lower back. Your lower back supports your upper
body, extending your spine and flexing it to either side, a part
of almost every activity imaginable.
Your
back is characterized by three smaller muscles: latisimus dorsi,
rhomboids (upper/middle back), and erector spinae (lower back).
These three muscles, along with smaller supporting muscles deep
beneath the skin's surface, play a huge role in almost everything
you do, from swinging a golf club to sitting at the dinner table.
Erector Spinae: Runs along the lower part of the spine, hereafter
referred to as the lower back. Your lower back supports your upper
body, extending your spine and flexing it to either side, a part
of almost every activity imaginable. 
