Table 1

Jugular vein plasma pH, bicarbonate and lactate concentrations, at rest and during recovery from a Competition Exercise Test, after horses were either given 1) an oral sodium acetate/acetic acid solution followed by a typical feeding protocol (NAA trial), or 2) a typical feeding protocol alone (Control trial)
Time (min)
 pH
 [HCO3-]
 [Lactate]

NAA
 Control
 NAA
 Control
 NAA
 Control
Pre-Ex
 7.48 ± 0.01
 7.48 ± 0.01
 36.5 ± 0.6
 36.4 ± 0.9
 0.7 ± 0.2
 0.8 ± 0.2
End Ex
 7.52 ± 0.01*
 7.53 ± 0.01*
 33.56 ± 0.4*
 34.7 ± 0.8
 2.8 ± 0.6*
 2.6 ± 0.6*
0'
 7.47 ± 0.01
 7.48 ± 0.01
 36.4 ± 0.8
 35.9 ± 0.9
 1.6 ± 0.1*
 1.7 ± 0.3*
20'
 7.47 ± 0.02
 7.48 ± 0.01*
 33.7 ± 1.4*
 38.0 ± 0.9*
 1.5 ± 0.2*
 1.1 ± 0.3
40'
 7.44 ± 0.01*
 7.45 ± 0.01*
 33.16 ± 1.2*
 36.2 ± 1.1
 1.5 ± 0.2*
 1.2 ± 0.3
60'
 7.43 ± 0.01*
 7.44 ± 0.01*
 33.8 ± 1.0*
 34.4 ± 0.5
 1.5 ± 0.2*
 1.1 ± 0.3
80'
 7.44 ± 0.01*
34.5 ± 1.2
1.4 ± 0.2*
100'
 7.44 ± 0.01*
34.8 ± 0.8
1.4 ± 0.2*
120'
 7.45 ± 0.01*
 7.44 ± 0.1*
 36.8 ± 0.8
 34.3 ± 0.6*
 1.2 ± 0.2
 1.1 ± 0.2
140'
 7.45 ± 0.01*
38.0 ± 0.8
1.2 ± 0.2
180'
 7.46 ± 0.01
 7.46 ± 0.01*
 37.8 ± 1.1
 33.7 ± 0.4*
 1.1 ± 0.2
 1.3 ± 0.2*
210'
 7.47 ± 0.01
39.7 ± 1.0*
1.1 ± 0.2
240'
 7.49 ± 0.01
 7.46 ± 0.01*
 40.46 ± 0.9*
 34.9 ± 0.6
 1.1 ± 0.2
 1.1 ± 0.2
300'
 7.51 ± 0.01*
 7.46 ± 0.01*
 42.01 ± 1.0*
 34.2 ± 0.6*
 1.2 ± 0.1*
 1.0 ± 0.3
360'
 7.51 ± 0.01*
 7.45 ± 0.01*
 44.1 ± 0.8*
 33.8 ± 0.5*
 1.1 ± 0.1
 1.2 ± 0.3
420'
 7.53 ± 0.01*
 7.45 ± 0.01*
 44.8 ± 0.9*
 34.4 ± 0.4*
 1.0 ± 0.2
 0.8 ± 0.2
480'
 7.53 ± 0.01*
 7.46 ± 0.01*
 44.5 ± 0.5*
 34.0 ± 0.2*
 0.9 ± 0.1
 0.9 ± 0.2
24 h
 7.49 ± 0.01
 7.46 ± 0.01*
 39.3 ± 1.5*
 34.2 ± 0.7
 1.2 ± 0.2
 0.9 ± 0.2

Values are mean ± SE in mmol/l. * Significantly different (P < 0.05) from pre-exercise time point.

Waller and Lindinger Acta Veterinaria Scandinavica 2007 49:38   doi:10.1186/1751-0147-49-38