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)

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