Why We Love high jump surfaces (And You Should, Too!)
http://deanyfek322.angelfire.com/index.blog/1658652/11-ways-to-completely-sabotage-your-high-jump-track/
As with the majority of track occasions, jumpers have three efforts at each height. Heights are raised 2 cm after each round, and just those who clear the bar move on to the next round. The winner is she or he