Actually , at WPI where I did my BS you were required to take 4 PE classes over the 4 years. Most took them 2 each year as freshman and sophmores. All it took to pass a PE class in college was to show up about 75 % of the time. You could be a 50 pound weakling or a 450 pound fat lady in the circus but all you had to do was show up 3/4 of the time.
However this was required of everyone , no distinction between fat and skinny people.