Noun
One who vaults; a leaper; a tumbler.
Source: Webster's dictionaryWhy do they call them vaulters?" "Vaulters?" "Voltigeur, Sharpe. French for vaulter." "God knows, sir." "Because the jump like fleas, sir, when you shoot at them. But don't worry yourself about that one, sir. He's a good voltigeur, that one. He's dead. Bernard Cornwell
After a vaulter has left the ground, the leg that was last touching the ground stays extended and swings forward to help propel the vaulter upwards. Source: Internet
A "no height", often denoted "NH", refers to the failure of a vaulter to clear any bar during the competition. Source: Internet
A more accurate description of this phase of the vault may be "the spin" because the vaulter spins around an imaginary axis from head to toe. Source: Internet
As the pole slides into the back of the box the pole begins to bend and the vaulter continues up and forward, leaving the trail leg angled down and behind him. Source: Internet
Extension The extension refers to the extension of the hips upward with outstretched legs as the shoulders drive down, causing the vaulter to be positioned upside down. Source: Internet