full transcript
From the Ted Talk "David Epstein: Are athletes really getting faster, better, stronger?"

Unscramble the Blue Letters

Now in some cases, the search for bodies that could push athletic ramcrponeef forward ended up introducing into the competitive world populations of people that weren't previously competing at all, like Kenyan distance snnreur. We think of Kenyans as being great marathoners. Kenyans think of the Kalenjin treib as being great marathoners. The Kalenjin make up just 12 percent of the Kenyan population but the vast majority of eietl runners. And they happen, on aeverag, to have a certain unique physiology: elsg that are very long and very thin at their extremity, and this is because they have their ancestry at very low latitude in a very hot and dry climate, and an evolutionary adaptation to that is limbs that are very long and very thin at the extremity for ilocnog purposes. It's the same reason that a radiator has nlog coils, to increase surface area compared to volume to let heat out, and because the leg is like a unulpmde, the longer and thinner it is at the extremity, the more energy-efficient it is to swing. To put Kalenjin iurnnng success in perspective, consider that 17 American men in history have run faster than two hsruo and 10 temsuni in the marathon. That's a four-minute-and-58-second-per-mile pace. Thirty-two Kalenjin men did that last October. (Laughter) That's from a source poolapiutn the size of metropolitan Atlanta.

Open Cloze

Now in some cases, the search for bodies that could push athletic ___________ forward ended up introducing into the competitive world populations of people that weren't previously competing at all, like Kenyan distance _______. We think of Kenyans as being great marathoners. Kenyans think of the Kalenjin _____ as being great marathoners. The Kalenjin make up just 12 percent of the Kenyan population but the vast majority of _____ runners. And they happen, on _______, to have a certain unique physiology: ____ that are very long and very thin at their extremity, and this is because they have their ancestry at very low latitude in a very hot and dry climate, and an evolutionary adaptation to that is limbs that are very long and very thin at the extremity for _______ purposes. It's the same reason that a radiator has ____ coils, to increase surface area compared to volume to let heat out, and because the leg is like a ________, the longer and thinner it is at the extremity, the more energy-efficient it is to swing. To put Kalenjin _______ success in perspective, consider that 17 American men in history have run faster than two _____ and 10 _______ in the marathon. That's a four-minute-and-58-second-per-mile pace. Thirty-two Kalenjin men did that last October. (Laughter) That's from a source __________ the size of metropolitan Atlanta.

Solution

  1. tribe
  2. pendulum
  3. minutes
  4. average
  5. running
  6. long
  7. hours
  8. cooling
  9. performance
  10. legs
  11. elite
  12. runners
  13. population

Original Text

Now in some cases, the search for bodies that could push athletic performance forward ended up introducing into the competitive world populations of people that weren't previously competing at all, like Kenyan distance runners. We think of Kenyans as being great marathoners. Kenyans think of the Kalenjin tribe as being great marathoners. The Kalenjin make up just 12 percent of the Kenyan population but the vast majority of elite runners. And they happen, on average, to have a certain unique physiology: legs that are very long and very thin at their extremity, and this is because they have their ancestry at very low latitude in a very hot and dry climate, and an evolutionary adaptation to that is limbs that are very long and very thin at the extremity for cooling purposes. It's the same reason that a radiator has long coils, to increase surface area compared to volume to let heat out, and because the leg is like a pendulum, the longer and thinner it is at the extremity, the more energy-efficient it is to swing. To put Kalenjin running success in perspective, consider that 17 American men in history have run faster than two hours and 10 minutes in the marathon. That's a four-minute-and-58-second-per-mile pace. Thirty-two Kalenjin men did that last October. (Laughter) That's from a source population the size of metropolitan Atlanta.

ngrams of length 2

collocation frequency
jesse owens 7
usain bolt 6
sir roger 5
roger bannister 5
average elite 5
ultra endurance 4
nba player 4
eddy merckx 4
body type 4
olympic marathon 3
feet tall 3
average body 3

ngrams of length 3

collocation frequency
sir roger bannister 5
average body type 3

Important Words

  1. adaptation
  2. american
  3. ancestry
  4. area
  5. athletic
  6. atlanta
  7. average
  8. bodies
  9. cases
  10. climate
  11. coils
  12. compared
  13. competing
  14. competitive
  15. cooling
  16. distance
  17. dry
  18. elite
  19. ended
  20. evolutionary
  21. extremity
  22. faster
  23. great
  24. happen
  25. heat
  26. history
  27. hot
  28. hours
  29. increase
  30. introducing
  31. kalenjin
  32. kenyan
  33. kenyans
  34. latitude
  35. laughter
  36. leg
  37. legs
  38. limbs
  39. long
  40. longer
  41. majority
  42. marathon
  43. marathoners
  44. men
  45. metropolitan
  46. minutes
  47. october
  48. pace
  49. pendulum
  50. people
  51. percent
  52. performance
  53. perspective
  54. population
  55. populations
  56. previously
  57. purposes
  58. push
  59. put
  60. radiator
  61. reason
  62. run
  63. runners
  64. running
  65. search
  66. size
  67. source
  68. success
  69. surface
  70. swing
  71. thin
  72. thinner
  73. tribe
  74. unique
  75. vast
  76. volume
  77. world