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Kinesiology is the scientific study of human or non-human body movement. Kinesiology addresses physiological, biomechanical, and psychological dynamic principles and mechanisms of movement.

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The interdisciplinary field of materials science, also commonly termed materials science and engineering is the design and discovery of new materials, particularly solids.

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Biomechanics is the study of the structure, function and motion of the mechanical aspects of biological systems, at any level from whole organisms to organs, cells and cell organelles, using the methods of mechanics.

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 How did the physical appearance of players and skill sets evolve over time?

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 How did the physical appearance of players and skill sets evolve over time?

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The physical appearance of players has changed from speed, size, muscle, and weight. The speed from players from then to now has increased. The size of players has changed height wise. The muscle has increased as well a lot along with weight. All of these contribute to the factors of weights, healthy foods, training, and having a positive mindset along with dedication.

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How did the sport of football evolve to become safer in present times? 

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How did the sport of football evolve to become safer in present times? 

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The sport of american football evolved to become safer in tackling and equipment. There are currently now many different tactics to tackle and make different plays. There are different ways to tackle people like going down towards the knees or going for the body. The helmets have evolved from leather helmets with very little padding. In present times, helmets are made with hard plastic, thick padding inside, face masks and chin straps. The helmets protect the head from getting concussions, neck injuries, and face injuries. Football shoulder pads were first made with leather and very little padding as well. The present pads are made with hard plastic and foam padding underneath. The pads protect the shoulders, chest, and ribs areas.