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Table 1 Changes in systolic blood pressure and diastolic blood pressure

From: Effects of L-theanine or caffeine intake on changes in blood pressure under physical and psychological stresses

Systolic blood pressure changes (mmHg)

 

High-response group

Low-response group

 

Mean blood pressure

SEM

Mean blood pressure

SEM

 

Caffeine

L-theanine

Placebo

Caffeine

L-theanine

Placebo

Caffeine

L-theanine

Placebo

Caffeine

L-theanine

Placebo

Base

0

0

0

0

0

0

0

0

0

0

0

0

AMT1

4.83

7.17

12.17

5.75

4.85

3.58

10.32

5.78

6.82

3.02

7.25

3.12

AMT2

3.05

5.55

13.82

3.48

6.04

3.48

5.62

2.07

1.36

3.84

5.23

2.06

AMT3

5.10

−0.36

17.68

2.95

8.50

3.24

5.78

4.31

3.98

2.89

5.80

2.01

AMT4

7.95

−0.49

21.35

3.24

5.45

3.36

5.98

9.05

3.64

5.19

4.79

2.39

AMT5

8.08

2.88

21.82

3.71

2.66

5.46

6.92

9.28

2.75

4.25

5.35

2.56

AMT6

10.75

5.01

22.41

3.55

2.21

4.47

5.91

9.98

3.28

4.47

5.75

2.63

CPT1

5.63

4.14

15.34

5.61

3.78

7.61

−2.63

7.00

3.19

5.17

7.55

4.03

CPT2

3.98

10.10

12.74

7.04

7.37

10.28

−9.26

−2.76

3.42

5.66

6.86

5.74

CPT3

18.58

28.22

19.57

7.20

5.92

8.47

3.98

12.31

15.95

5.00

7.35

4.41

CPT4

29.62

36.24

28.04

8.36

8.02

7.11

16.20

23.71

25.82

4.58

5.79

3.57

CPT5

40.52

47.64

40.05

8.71

6.67

4.70

31.65

32.08

33.61

5.23

7.46

4.99

CPT6

45.36

54.15

49.15

7.15

6.22

4.24

38.10

39.48

39.24

6.85

7.55

5.25

RP1

44.70

50.71

49.64

6.61

5.76

5.98

35.92

40.74

35.55

4.57

7.75

6.34

RP2

43.03

43.70

46.51

7.48

6.69

6.26

35.18

43.70

36.82

5.86

7.85

6.26

RP3

35.78

38.82

41.28

6.13

6.70

6.77

31.30

33.81

33.41

4.95

6.94

6.57

RP4

30.66

29.77

32.61

6.63

6.02

4.00

26.18

26.68

26.41

4.76

6.68

4.66

RP5

25.05

24.68

24.78

6.41

5.04

2.77

24.11

20.12

21.92

4.78

5.82

4.89

RP6

22.99

20.92

20.12

5.56

4.09

2.23

20.73

18.22

17.99

4.70

5.20

4.58

RP7

21.68

19.58

19.90

5.15

3.96

3.03

16.51

21.51

18.14

3.77

5.38

4.31

RP8

19.99

16.77

21.42

5.33

3.83

2.28

15.97

19.44

17.05

4.62

5.35

2.91

RP9

18.95

14.82

23.78

4.52

3.25

2.61

15.17

17.75

18.78

4.82

5.95

3.62

RP10

15.32

15.12

20.72

3.46

3.71

3.11

13.72

18.22

20.75

5.11

6.80

3.90

RP11

15.72

16.94

17.67

3.20

5.49

3.23

15.27

18.48

22.31

4.22

6.66

4.34

RP12

17.25

17.55

19.34

3.29

3.98

3.38

17.28

18.84

21.79

4.70

6.35

4.66

RP13

17.35

15.34

23.24

3.92

3.46

3.27

15.42

22.60

17.48

4.96

6.25

4.65

RP14

15.36

16.77

20.18

3.67

5.27

3.30

14.40

18.04

15.75

5.45

5.50

3.33

RP15

15.06

18.07

22.38

3.85

3.84

2.66

9.80

20.72

15.35

5.23

6.03

3.03

RP16

16.48

16.54

18.65

2.71

3.50

3.63

12.42

23.12

17.28

4.57

7.01

3.83

RP17

18.10

17.70

17.67

3.75

2.96

3.49

13.92

19.35

18.24

4.87

5.63

3.76

RP18

18.33

16.40

15.70

3.04

1.96

4.23

14.43

16.14

19.36

3.91

6.94

3.10

Diastolic blood pressure changes (mmHg)

 

High-response group

Low-response group

 

Mean blood pressure

SEM

Mean blood pressure

SEM

 

Caffeine

L-theanine

Placebo

Caffeine

L-theanine

Placebo

Caffeine

L-theanine

Placebo

Caffeine

L-theanine

Placebo

Base

0

0

0

0

0

0

0

0

0

0

0

0

AMT1

4.96

6.00

11.74

3.66

2.30

1.97

7.41

5.87

7.14

2.65

3.20

1.62

AMT2

4.47

5.34

12.30

2.53

1.31

3.56

2.38

1.46

4.14

2.61

2.98

2.08

AMT3

5.09

0.61

12.60

1.98

3.27

2.91

3.51

3.00

4.39

2.71

3.27

2.27

AMT4

5.73

2.14

17.07

2.39

2.20

2.83

4.22

5.31

5.39

3.34

3.22

2.00

AMT5

5.81

5.67

16.10

2.27

3.43

4.83

5.39

4.99

4.51

2.92

3.03

1.88

AMT6

7.19

6.64

16.90

2.37

3.08

3.73

3.95

6.66

4.64

2.98

3.03

1.73

CPT1

7.70

7.64

18.30

3.54

3.66

4.12

3.16

10.21

7.52

4.15

3.32

2.35

CPT2

8.56

9.58

16.31

3.87

3.60

5.78

0.89

1.36

6.49

4.13

3.14

2.88

CPT3

20.21

22.98

22.82

4.57

4.24

3.62

9.71

11.34

16.82

3.16

3.73

1.73

CPT4

28.40

30.20

29.32

5.15

6.15

1.49

18.34

20.10

23.91

2.86

2.84

2.14

CPT5

36.06

38.60

38.72

5.17

5.60

2.20

24.56

26.83

28.84

2.47

3.38

1.91

CPT6

39.39

42.83

43.18

4.30

4.62

3.75

27.31

30.29

32.04

2.90

3.73

2.23

RP1

35.79

38.60

42.20

5.27

4.67

4.80

24.09

27.87

27.85

2.71

3.48

2.61

RP2

32.09

31.23

36.65

6.64

5.16

4.47

19.93

25.49

24.41

3.35

3.74

2.22

RP3

25.97

26.03

31.75

5.68

5.50

4.00

16.69

18.37

19.62

3.04

3.84

3.18

RP4

21.84

21.50

25.34

5.36

5.65

2.92

13.60

15.34

16.02

3.16

3.82

2.84

RP5

18.16

17.67

19.81

5.31

4.85

2.57

12.40

12.10

12.68

3.04

3.10

2.99

RP6

16.11

15.78

16.97

4.49

4.38

1.68

10.79

11.10

11.09

3.20

2.71

2.72

RP7

14.83

14.55

15.90

3.73

4.37

1.58

8.04

12.81

11.44

2.59

2.66

2.59

RP8

13.71

12.40

16.55

3.80

3.67

1.98

8.26

10.90

10.98

3.29

2.75

1.79

RP9

12.59

12.25

18.04

3.83

3.38

2.17

6.76

10.14

12.08

3.11

2.99

2.36

RP10

9.06

12.00

15.18

2.98

3.86

2.63

5.95

10.23

12.16

3.47

2.99

2.64

RP11

10.23

12.78

13.37

2.58

3.72

2.73

7.45

10.24

12.82

2.42

2.62

2.38

RP12

10.90

12.94

14.80

2.89

3.04

2.93

7.04

10.61

12.76

3.19

3.18

2.62

RP13

10.04

11.61

16.50

3.04

2.74

2.47

6.49

12.07

9.99

2.90

2.95

2.94

RP14

8.90

12.14

13.94

2.90

3.26

2.53

5.72

8.90

9.75

3.19

3.04

1.67

RP15

9.30

12.54

16.81

3.12

2.76

1.97

4.38

11.49

8.88

3.33

2.78

1.70

RP16

8.99

10.44

13.04

2.50

1.71

2.86

5.96

11.91

9.58

2.28

2.87

1.76

RP17

9.30

11.80

12.77

2.69

2.30

3.38

5.79

9.37

10.08

3.29

2.70

2.12

RP18

9.66

12.08

10.03

2.33

2.53

3.43

6.17

8.93

11.50

2.43

3.06

2.57