It's true. Muscles can only contract and as such pull against something. Depending on what you're doing the "something" that a muscle pulls against is a lever that ends up pushing, but then the pushing pressure is caused when the muscle forces the lever (bone) to push outward.
But muscle can either contract or relax... that's all it can do.
They pull on bones by contracting.
You can pull a muscle which means it really aches but you cant push a muscle
No. Muscles only pull (contract) and relax.
not push only pull or contract
Yes, muscles can only shorten and relax. They can only pull.
If you pull or push your muscles get stretched and gives discomfort. Sometimes muscle fibres snap in which case you get a lot of discomfort
No, muscles can't push! They can only pull. http://www.eslteachersboard.com/cgi-bin/motivation/index.pl?page=5;read=356
pullThey pull on connective tissue sheaths of skeletal muscles which transmits pulling force to the bone to be move.
Because Muscles only pull not push
Your muscles pull on bones but they never push bones.
So that we can pull and push both.
Muscles contract and relax to pull/push