12 Reasons You Shouldn't Invest in high jump surfaces
https://spark-wiki.win/index.php?title=High_jump_Explained_in_Fewer_than_140_Characters
Similar to a lot of track events, jumpers have 3 attempts at each height. Heights are raised 2 cm after each round, and just those who clear the bar proceed to the next round. The winner is he or she who clears