Distribution of head-neck-positions: distribution (number of horses) of head-neck positions (HNP) in competition by HNP in the warm-up area.

<p>HNP in competition: white = nasal plane in front of the vertical, grey = nasal plane at the vertical, black = nasal plane behind the vertical. At both group levels, HNP distributions deviated significantly from chance, with more riders than expected presenting their horses in competition with an HNP in front of the vertical (A/L: P<0.0001, M/S: P = 0.0479).