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Table 4 Descriptive statistics for each outcome variable

From: A quasi-experimental examination of weight-reducing dehydration practices in collegiate male rowers

 

M

SD

Mdn

Min

Max

Hydration variables (At weigh-in)

 Urine osmolality (mmol/L)

747.71

306.76

860.50

128.33

1148.00

 Plasma osmolality (mmol/L)

296.30

8.56

297.00

275.33

310.67

 Symptom number (Z)

1.02

1.89

0.10

-0.83

5.67

 Symptom severity (Z)

2.43

3.60

0.74

-0.68

14.45

 Thirst (Z)

3.13

7.05

1.26

-3.77

25.51

Consumption (during rehydration)

 Carbohydrates (g)

153.62

48.17

154.00

70.00

254.00

 Protein (g)

18.17

7.90

18.00

7.20

38.00

 Fat (g)

21.25

11.76

26.00

1.50

45.50

 Water (mL)

1396.24

570.93

1438.75

295.50

2956.00

 Total calories (kcal)

856.46

277.40

890.00

335.00

1300.00

Hydration variables (post rehydration)

 Urine osmolality (mmol/L)

648.35

350.84

748.17

66.67

1109.33

 Plasma osmolality (mmol/L)

295.25

5.33

295.67

284.67

306.67

 Symptom number (Z)

0.85

2.57

-0.05

-0.83

12.33

 Symptom severity (Z)

2.03

4.79

0.64

-1.41

21.81

 Thirst (Z)

-2.66

2.05

-2.58

-7.49

0.78

Rowing ergometer performance variables

 Total incremental test watts (W)

72,415.81

16,478.88

71,060.00

37,494.00

113,641.00

 Average 10-stroke peak power (W)

680.32

73.03

678.75

540.50

806.00

 Average 10-stroke stroke rate (strokes/min)

38.32

2.20

38.75

32.50

43.50

Maximal energy production variables

 Max VO2/kg (L/min)

54.99

5.30

55.59

44.66

67.49

 Max lactate (mmol/L)

13.80

2.44

13.35

9.30

19.30

 Resting blood lactate (mmol/L)

3.03

2.44

2.55

0.93

16.20

Submaximal energy production variables

 VO2 at 2 mmol/L (L/min)

37.74

6.39

38.53

28.83

50.54

 VO2 at 4 mmol/L (L/min)

43.28

5.70

43.64

33.20

55.32

 Wattage at 2 mmol (W)

185.17

45.87

183.59

95.00

284.76

 Wattage at 4 mmol (W)

231.81

45.94

234.55

101.00

329.36

Visuomotor interception task

 Logit percent success

-1.56

1.68

-1.39

-4.60

1.39

 Target-finger position difference

299.52

305.99

311.66

-222.33

1008.45

 Target-finger time difference

-56.43

42.21

-59.31

-146.79

23.61

Visuomotor stop-signal task

 Logit successful inhibitions (%)

-0.14

2.41

-0.26

-4.60

4.60

Visuomotor double-step task

 Mean absolute error (BWD; mm)

2.78

0.91

2.67

1.29

5.02

 Mean absolute error (FWD; mm)

2.90

1.12

3.02

1.03

5.48

 Mean movement time (BWD; ms)

317.21

103.54

294.79

205.93

604.64

 Mean movement time (FWD; ms)

346.64

89.81

334.46

190.92

564.98

  1. M = mean, SD = standard deviation, Mdn = median, Min = minimum, Max = maximum, Z = Z-score units calculated using each participants’ mean and standard deviation from their baseline weigh-in days; FWD = Forward jump; BWD = Backward jump. Variables corresponding to the stop-signal task are given for the 200 ms delay condition. Variables corresponding to the interception task are given for the fast, acceleration condition