Sources:
- http://www.cracked.com/funny-4581-gymnastics/
- http://www.gymphysics.blogspot.com/
- http://en.wikipedia.org/wiki/Gabby_Douglas
- http://en.wikipedia.org/wiki/Balance_beam
- http://gymnastics.about.com/od/trainingadvice/ss/learnbackflip_3.htm
- http://www.youtube.com/watch?v=OdkxBnK-Tvo&feature=youtu.be
- http://www.livestrong.com/article/341380-short-history-of-gymnastics/
- http://www.cheerleadingblog.com/pros-guide-to-tumbling-for-cheerleading-back-tuck/
- http://images.google.com/imgres?q=gymnastics&hl=en&tbo=d&biw=1022&bih=680&tbs=sur:fmc&tbm=isch&tbnid=idrwdYw1hBFwiM:&imgrefurl=http://www.fotopedia.com/items/flickr-2812627533&docid=m1fGj_YRuegTIM&imgurl=http://images.cdn.fotopedia.com/flickr-2812627533-hd.jpg&w=1819&h=1080&ei=BEDmUO63N6jh0wGm5oDICQ&zoom=1&iact=hc&vpx=74&vpy=208&dur=1316&hovh=173&hovw=292&tx=171&ty=97&sig=117636385498481808989&page=1&tbnh=141&tbnw=233&&ndsp=18&ved=1t:429,r:1,s:0,i:180
- http://images.google.com/imgres?q=olympic+gymnastics&hl=en&sa=X&tbo=d&biw=1022&bih=680&tbs=sur:fmc&tbm=isch&tbnid=osPQkkn6nd6ndM:&imgrefurl=http://www.fotopedia.com/items/flickr-2797917818&docid=DmM-_G7ETOoTsM&imgurl=http://images.cdn.fotopedia.com/flickr-2797917818-hd.jpg&w=961&h=1080&ei=1EDmUPKfJOqE0QHWwoHgCg&zoom=1&iact=hc&vpx=4&vpy=173&dur=1434&hovh=238&hovw=212&tx=118&ty=137&sig=117636385498481808989&page=1&tbnh=135&tbnw=120&&ndsp=15&ved=1t:429,r:0,s:0,i:161
- http://images.google.com/imgres?q=balance+beam+gymnastics&hl=en&sa=X&tbo=d&biw=1022&bih=680&tbs=sur:fmc&tbm=isch&tbnid=1L-kWYOlT3K9MM:&imgrefurl=http://www.fotopedia.com/items/flickr-6120094654&docid=fOjECzvi7h1sHM&imgurl=http://images.cdn.fotopedia.com/flickr-6120094654-hd.jpg&w=1625&h=1080&ei=bkHmUJjeEubF0AGMuYHwBw&zoom=1&iact=hc&vpx=425&vpy=203&dur=532&hovh=183&hovw=275&tx=124&ty=80&sig=117636385498481808989&page=1&tbnh=140&tbnw=210&&ndsp=4&ved=1t:429,r:2,s:0,i:128
- http://pixabay.com/en/sign-icon-symbol-silhouette-sport-40767/
- http://pixabay.com/en/people-girl-aerobics-cartoon-28775/
- http://images.google.com/search?as_q=force&tbs=sur:fc&tbo=d&biw=1022&bih=680&sei=lETmUKX4DojW0gGj5YDgBA&tbm=isch#hl=en&tbo=d&tbs=sur:fc&tbm=isch&sa=1&q=arrows+pointing+down&oq=arrows+&gs_l=img.1.1.0l10.74633.74633.2.76030.1.1.0.0.0.0.106.106.0j1.1.0...0.0...1c.1.1onPaiZe1Fo&bav=on.2,or.r_gc.r_pw.r_qf.&bvm=bv.1355534169,d.dmQ&fp=2f9e66b671e163fe&bpcl=40096503&biw=1022&bih=680
- http://images.google.com/search?as_q=force&tbs=sur:fc&tbo=d&biw=1022&bih=680&sei=lETmUKX4DojW0gGj5YDgBA&tbm=isch#hl=en&tbo=d&tbs=sur:fc&tbm=isch&sa=1&q=arrows+pointing+up+&oq=arrows+pointing+up+&gs_l=img.3...3907.3907.10.4524.1.1.0.0.0.0.0.0..0.0...0.0...1c.1.k4HFbMQRbdY&bav=on.2,or.r_gc.r_pw.r_qf.&bvm=bv.1355534169,d.dmQ&fp=2f9e66b671e163fe&bpcl=40096503&biw=1022&bih=680
- http://pixabay.com/en/circle-shapes-round-shape-25926/