Table 2

Plasma Lactate, Glucose, Osmolality and Electrolyte Response to Exercise

Variable

T2

T3

T4

T5

Time Point

Lactate (mmol·L^-1)

DHY

1.9 ± 0.6

1.9 ± 0.6

2.0 ± 0.6

1.7 ± 0.6

RHY

1.8 ± 0.5

2.1 ± 0.4

2.0 ± 0.5

2.1 ± 0.4

IP*

11.1 ± 2.3

11.9 ± 2.2

9.9 ± 4.2

11.7 ± 2.2

Glucose (mmol·L^-1)

BL

5.8 ± 1.2

5.8 ± 1.2

5.8 ± 1.2

5.8 ± 1.2

DHY

6.5 ± 1.8

6.4 ± 1.1

6.4 ± 1.4

5.7 ± 1.2

RHY

5.9 ± 1.7

6.2 ± 1.1

6.4 ± 0.9

5.6 ± 1.2

IP*

6.9 ± 1.6

8.6 ± 1.5

8.4 ± 1.9

7.4 ± 2.6

Osmolality (mOsm)

BL

295 ± 4

295 ± 4

295 ± 4

295 ± 4

DHY

298 ± 5

298 ± 5

296 ± 4

298 ± 6

RHY

298 ± 6

293 ± 5

292 ± 4

294 ± 4

IP#

308 ± 5

299 ± 4

302 ± 5

303 ± 7

Potassium (mmol·L^-1)

BL

4.1 ± 0.4

4.1 ± 0.4

4.1 ± 0.4

4.1 ± 0.4

DHY

4.2 ± 0.9

4.0 ± 0.3

4.1 ± 0.3

4.0 ± 0.3

RHY

4.1 ± 0.2

4.3 ± 0.3

4.3 ± 0.6

4.1 ± 0.4

IP*

4.5 ± 0.7

4.5 ± 0.5

4.4 ± 0.4

4.5 ± 0.6

Sodium (mmol·L^-1)

BL

139.4 ± 1.1

139.4 ± 1.1

139.4 ± 1.1

139.4 ± 1.1

DHY*

141.7 ± 1.1

141.3 ± 1.6

141.1 ± 2.5

141.2 ± 1.4

RHY

141.5 ± 1.5@

139.6 ± 1.9

138.7 ± 1.9

138.7 ± 1.6

IP#

144.0 ± 2.2@

140.6 ± 1.8

140.7 ± 2.0

140.2 ± 1.3

* = Significant main effect compared to all other time points. # = Significant main effect compared to BL and RHY. @ = significantly different than T3 - T5. BL = baseline; DHY = dehydration; RHY = rehydration; IP = immediate post-exercise.

Hoffman et al. Journal of the International Society of Sports Nutrition 2010 7:8   doi:10.1186/1550-2783-7-8