that's just like someone saying 'why cant you walk around on your hands?'
its just not the way they are made
A chair.
The kangaroos back legs are stronger then the front legs because they need the strength of thier back legs to jump and to use them to fight.
Because their back legs are longer than their front. Just like humans, They have short front legs and long back legs, So that is why they are able to stand on 2 feet, BUT They cant walk they can just stand.
no, the back legs are longer, so that why they can go up a hill very easily but cant go down very well
Lie flat on your back and use something to elevate your legs.
I think they use their legs...and the big hump..on their back..
mainly your legs but and your back a little
a table
Running and leaping. Lions use their back legs to anchor themselves when they kill prey.
Back legs
Hamstrings are used whenever you use your legs, like when walking, lunging, turning, and even standing. Cheerleaders specifically use their hamstrings to perform jumps, stunts, and tumbling passes.
Then you need to have the dog examined by a veterinarian to find out why, and to have the dog treated.