Some risk factors for heart disease we're born with. Others begin developing as early as childhood. That's why parents should encourage healthy habits in children. And that poses a problem for cattle. Offensive and defensive linemen are large, some are very large, with lots of bulk and muscle.
Wide receivers are taller, leaner, less muscular and faster.
Their body conformation relates to the task they do. The same is true of horses. Some horses are tall, long, angular and lighter muscled. Others are shorter, heavier muscled and not as tall. Each conformation type is designed for a specific type of athletic ability.