of the general population. here is abc s chris cuomo. reporter: it is a sport derived from warfare that is all about violence. espn sports science says crushing blows like this can be the force equivalent of a sledgehammer blow to the head. one study found the average player takes 900 to 1,500 head shots a season. we all know what happens out here on the football field. the pass is thrown, a player makes a catch, a couple of quick moves, then the explosive collision that makes the crowd go wild. but what we are learning abut what happens to the players once they leave this field may be even more shocking. the study find former football players suffer a higher risk of death from brain-related diseases. four times more likely to die of alzheimer s disease or als than the general population. there is a possibility even high school football players who have experienced more than one traumatic brain injury might be at risk for developing neurodegeneration later in life. reporter: th
much as i can. lochte, used to get calories from junk food. he refined his diet and workout that includes moving anchor chains and tires in addition to swimming around 70 miles a week. while the average person doing the crawl at the y can propel themselves about four feet per stroke, gold medalist rebecca soni goes 50% farther. when our friends at espn sports science put sensors on her hands they found out why. each stroke generates up to 24 pounds of force, and while the average person is stronger on one side, and veers off of course, her stroke is almost perfectly balanced. over in track and field, jesse williams can jump higher than any person on the planet almost two feet higher than he is tall thanks to a step that generates 1,200 pounds of force, enough to lift his own body weight eight times.
so much energy digging them into pool water hour after hour he out-eats the average american male by 10,000 calories a day. there will be a lot of ice tubs, massages, trying to cram calories into my system in as much as i can. lochte, used to get calories from junk food. he refined his diet and workout that includes moving anchor chains and tires in addition to swimming around 70 miles a week. while the average person doing the crawl at the y can propel themselves about four feet per stroke, gold medalist rebecca soni goes 50% farther. when our friends at espn sports science put sensors on her hands they found out why. each stroke generates up to 24 pounds of force, and while the average person is stronger on one side, and veers off of course, her stroke is almost perfectly balanced. over in track and field, jesse williams can jump higher than