Why Can We Stand Up Straight And Walk

Upright standing and walking on two legs is the largest skills which man mastered. These skills must learn. If you could give us four-foot guest from another planet came to visit, it would admire our ability to walk on two legs. If it tried, it took him a long time to learn this skill, just like us when we were little?

When we stand still, constantly we make movements to maintain balance: Move the weight from one foot to another, and the pressure on the joints and muscles of the body are directed to start at this or that side.

In order to maintain balance when standing still, constantly working about 300 muscles in our body. Therefore, we are tired when long standing. In fact, the standout is like work.

In the walk not only use the skill of maintaining a balance but also two natural forces. The first is the air pressure. Our thigh bone fits the recess of the hip joint so perfect that in this joint there is a vacuum. The air pressure helps that this compound holds firm. Thanks to this, the foot is connected to the body so that its weight is not felt.

Other natural forces that we use when we walk is a force of gravity. Since muscles elevate the leg, the force of gravity is pulling down and leg hang freely, like a pendulum in clock.

When you see how an acrobat walking on the wire tighter, maintaining balance, remember that it performs the same, only much more severe skill as you do when you stand or walk. He had practiced a long, long time.