Question
When I bend down, what kind of force is involved? Is it the pulling force of the muscle?
Answers
drwls
Bending over is caused by contraction (pulling) of the very large psoas muscles, which are shown here:
http://collinsdc.com/blog/wp-content/uploads/2008/07/psoas.jpg
http://collinsdc.com/blog/wp-content/uploads/2008/07/psoas.jpg