In many films and comics throughout the years, the shield has been able to withstand incredible amounts of force, not least, the full strength of the Hulk and Thor’s hammer. The shield also has unique properties and the shape and material means it can fly through the air easily, without being affected by wind, the shield also rebounds elastically, which means none of the energy is wasted and so will rebound from hitting a target at near enough the same speed it is thrown. The shield is said to be indestructible as it resists heat and force exerted on it. The only way to damage or deform the item is by altering the molecular bonding in the structure.
It is not only an elaborate Frisbee that makes Captain America the ultimate leader and soldier. He has mastered, developed and refined his own unique fighting style that incorporates several different forms of martial arts that makes him quite a formidable opponent. Steve Rogers was able to maintain his physique by undergoing an intense training regime that made him one of the best hand to hand fighters in the world.
The super soldier serum really is sophisticated equipment and it saves Steve Rogers life. The serum is highly sophisticated and it allows the body to make more and more of it so that the natural physical condition is maintained and does not diminish over time. On top of this, the reason that Captain America survives in the ice is because the serum allows the body to enter a trance mode, where it does not function properly but is still alive before being frozen in a block of ice, later to be discovered and reused to help save the world.