References

Usain Bolt:

Picture: http://www.telegraph.co.uk/sport/othersports/athletics/10320520/Usain-Bolt-reconsidering-plans-to-retire-after-2016-Rio-Olympic-Games.html

Info about Usian Bolt: 

https://en.m.wikipedia.org/wiki/Usain_Bolt 

http://www.dailymail.co.uk/sport/othersports/article-2885738/Usain-Bolt-Jamaican-sprinters-secret-success-track-symmetrical-knees.html

Sonny Bill Williams
Pictures: http://cdn.3news.co.nz/3news/AM/2014/11/10/9be3981f-216c-46cd-adb4-d76515e08107/Sonny-Bill-Williams-1200.jpg?width=700

http://islandher.com/wp-content/uploads/freshizer/4f28ae66890854fa1eb0cb972571315b_Sonny-boxer-220.jpg

Info about Sonny Bill Williams:
http://www.dailytelegraph.com.au/news/nsw/madfit-sonny-bill-williams-talks-food-and-fitness-with-adam-mad-dog-macdougall/story-fni0cx12-1227202016672

http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10751389

Rich Froning:
Picture:
http://www.theboxmag.com/content/content/9742/Rich-Froning3.jpg

Info about Rich Froning:
http://trainingandstirring.com/gods-sake-dont-listen-rich-froning/
https://en.wikipedia.org/wiki/Rich_Froning_Jr.

Rob Gronkowski:
Pictures:
http://a1.fssta.com/content/dam/fsdigital/fscom/Buzzer/Images/2015/01/05/rob-gronkowski.vadapt.955.high.5.jpg

Info about Rob Gronkowski:
http://www.muscleandfitness.com/athletes-celebrities/news/gronkd-getting-personal-gronkowskis
https://en.wikipedia.org/wiki/Rob_Gronkowski

Michael Jordan:
Pictures:
http://imgc.allpostersimages.com/images/P-473-488-90/53/5310/R8OIG00Z/posters/michael-jordan-2011-portrait-plus.jpg

Info about Michael Jordan:
http://sciencetimekitty.blogspot.ie/2012/03/genetics-of-michael-jordan-usain-bolt.html
https://en.wikipedia.org/wiki/Michael_Jordan