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Table 4 Blood lactate results observed during the maximal exercise test

From: Effects of 28 days of beta-alanine and creatine supplementation on muscle carnosine, body composition and exercise performance in recreationally active females

 

BA (n = 8)

BAC (n = 9)

CRE (n = 8)

PLA (n =7)

Time

P value

Resting lactate (mmol/L)

 Baseline

1.44 ± 0.64

1.51 ± 0.44

1.33 ± 0.24

2.03 ± 0.96

1.56 ± 0.63

T = 0.71

 1 Week

1.60 ± 0.61

1.43 ± 0.58

1.18 ± 0.28

1.54 ± 0.46

1.43 ± 0.51

G = 0.15

 4 Weeks

1.58 ± 0.43

1.36 ± 0.49

1.53 ± 0.47

1.66 ± 0.45

1.52 ± 0.45

T × G = 0.38

 Group

1.54 ± 0.12

1.43 ± 0.11

1.34 ± 0.12

1.74 ± 0.13

  

Peak lactate (mmol/L)

 

 Baseline

12.91 ± 4.48bcd

8.63 ± 3.34a

9.71 ± 1.83a

7.54 ± 2.26

9.73 ± 3.64

T = 0.10

 1 Week

10.43 ± 2.27

8.93 ± 3.18

9.20 ± 2.15

8.76 ± 1.25

9.33 ± 2.36

G = 0.07

 4 Weeks

9.85 ± 1.89†

8.04 ± 2.59

8.99 ± 1.46

8.64 ± 2.28

8.87 ± 2.12

T × G = 0.05

 Group

11.06 ± 0.77bd

8.54 ± 0.73a

9.30 ± 0.77

8.31 ± 0.83a

  

Lactate threshold (% Peak VO2)

 Baseline

65.18 ± 8.37

67.12 ± 14.08

66.09 ± 7.54

66.40 ± 10.14

66.22 ± 7.45

T = 0.14

 1 Week

68.86 ± 5.98

69.92 ± 7.44

67.31 ± 6.64

64.51 ± 6.88

67.82 ± 6/75

G = 0.91

 4 Weeks

67.04 ± 7.66

69.04 ± 6.91

69.61 ± 9.42

73.53 ± 5.83

69.67 ± 7.58

T × G = 0.86

 Group

67.03 ± 1.73

68.70 ± 1.63

67.67 ± 1.73

68.15 ± 1.85

  

Onset of blood lactate (%VO2peak)

 Baseline

77.50 ± 9.89

82.94 ± 10.9

81.71 ± 8.82

83.81 ± 8.82

81.47 ± 9.54

T = 0.13

 1 Week

78.50 ± 10.1

84.90 ± 9.30

83.48 ± 7.67

75.17 ± 17.43

80.82 ± 11.5

G = 0.58

 4 Weeks

84.14 ± 8.35

86.68 ± 8.51

83.76 ± 11.68

84.77 ± 11.93

84.90 ± 9.70

T × G = 0.81

 Group

80.05 ± 2.61

84.84 ± 2.46

82.98 ± 2.61

81.25 ± 2.79

  

Blood lactate difference from baseline to max (mmol/L)

 Baseline

11.48 ± 4.19bcd

7.10 ± 3.52a

8.39 ± 1.75ad

5.51 ± 2.15ac

8.17 ± 3.67

T = 0.08

 1 Week

8.83 ± 2.64†

7.43 ± 3.31

8.03 ± 2.03

7.20 ± 1.59

7.88 ± 2.49

G = 0.06

 4 Weeks

8.28 ± 1.88†

6.61 ± 2.73

7.46 ± 1.26

6.81 ± 2.24

7.28 ± 2.12

T × G = 0.02

 Group

9.53 ± 0.79

7.05 ± 0.74

7.96 ± 0.79

6.51 ± 0.84

  
  1. Individual group and time data are presented as means ± SD while time and group effects are presented as means ± SEM. MANOVA analysis revealed overall Wilks’ Lambda time (p = 0.33) and group × time (p = 0.34) effects. Univariate ANOVA p-levels from MANOVA analysis are presented for each variable. BA signifies beta-alanine only group; BAC represents beta-alanine and creatine combined group; CRE represents the creatine only group; PLA represents the placebo group; T represents time p-level; G represents group p-level, and T × G represents interaction. † represents p < 0.05 difference from baseline. arepresents p < 0.05 difference from BA group. brepresents p < 0.05 difference from BAC group. crepresents p < 0.05 difference from CRE group. drepresents p < 0.05 difference from PLA group.