Table 1.  Changes in biochemical parameters and plasma volume during performance tests before (Test 1) and after (Test 2) rapid body mass loss. Data are means (SD).

Metabolite

Test 1

Test 2

Pre 1

Post 1

Pre 2

Post 2

Ammonia (µmol·l–1)

20.3 (10.0)

67.6 (26.5)*

19.6 (9.7)

80.9 (29.1) *

Lactate (mmol·l–1)

1.8 (0.7)

6.9 (1.9) *

1.6 (0.8)

6.9 (2.2) *

Glucose (mmol·l–1)

4.1 (0.7)

3.9 (0.9)

4.0 (0.9)

3.9 (0.9)

Urea (mmol·l–1)

4.9 (0.8)

4.9 (0.8)

5.9 (1.2) †

5.9 (1.1) †

Haematocrit (%)

42.9 (2.5)

44.7 (3.0) *

44.8 (2.0) †

46.0 (2.7) * †

Haemoglobin (g·100 ml–1)

14.0 (0.9)

14.5 (1.1) *

14.4 (0.9) †

15.0 (1.1) * †

Change in plasma volume (%)

–6.6 (4.4)

–5.6 (3.8)
Pre = before and Post = after performance test blood sample.
Significantly different (p < 0.05): * from corresponding Pre value; † from corresponding value in Test 1.