Are Athletes Getting Bigger, Stronger, and Faster?

That was the title of a recent TED talk given by David Epstein. It definitely has ties to STEM, athletics, and academics. We're going to watch this video, and then I'd like your reaction to it.

Are Athletes Getting Bigger, Stronger, and Faster?

Questions:

1. What is the most interesting thing you saw/learned in the video? 
2. How can we relate the mindset part to academics?
3. Will World Records continue to be broken, or will we reach our limits soon?
4. Which sport/activity do you think you're "built" for?