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Table 1 Characteristics of randomized, double-blind, placebo-controlled, crossover studies included in meta-analysis

From: Effect of dietary nitrate on human muscle power: a systematic review and individual participant data meta-analysis

Authors and year

Subjects

NO3 dose

N

Age (y)

Source

Amount (mmol)

Measured

Assumed

Duration

Placebo

Test modality

Rothwell and Alkhatib 2014 [42]

12

21

BRJ

 

6.4

Acute dose

Othera

Sprint cycling

Coggan et al. 2015 [43]

12

36

BRJ

11.2

 

Acute dose

NO3-free BRJ

Isokinetic knee extension

Coggan et al. 2015 [44]

9

57

BRJ

11.2

 

Acute dose

NO3-free BRJ

Isokinetic knee extension

Rimer et al. 2016 [45]

13

26

BRJ

11.2

 

Acute dose

NO3-free BRJ

Sprint cycling

Porcelli et al. 2016 [46]

7

25

High NO3 diet

 

8.2

6 days

Normal NO3 diet

Sprint cycling

Kramer et al. 2016 [47]

12

23

KNO3

 

8.0

6 days

KCl

Sprint cycling

Wylie et al. 2016 [48]

10

21

BRJ

8.2

 

5 days

NO3-free BRJ

Sprint cycling

Domínguez et al. 2017 [49]

15

21

BRJ

 

6.4

Acute dose

Otherb

Sprint cycling

Coggan et al. 2018 [50]

8

65

BRJ

11.2

 

Acute dose

NO3-free BRJ

Isokinetic knee extension

Bender et al. 2018 [51]

12

17

BRJ

 

12.9

Acute dose

NO3-free BRJ

Sprint cycling

Jonvik et al. 2018 [52]

52

24

BRJ

 

12.9

6 days

NO3-free BRJ

Sprint cycling

Cuenca et al. 2018 [53]

15

22

BRJ

 

6.4

Acute dose

NO3-free BRJ

Sprint cycling

Smith et al. 2019 [54]

12

22

BRJ

 

6.4

Acute dose

NO3-free BRJ

Sprint cycling

Jodra et al. 2020 [55]

15

23

BRJ

 

6.4

Acute dose

NO3-free BRJ

Sprint cycling

Coggan et al. 2020 [56]

12

71

BRJ

13.4

 

Acute dose

NO3-free BRJ

Isokinetic knee extension

Jonvik et al. 2020 [57]

15

25

BRJ

15.9

 

6 days

NO3-free BRJ

Isokinetic knee extension

Rodriguez-Fernandez et al. 2020 [58]

18

23

BRJ

 

12.9

Acute dose

Otherb

Inertial load squats

Gallardo et al. 2021 [59]

9

70

BRJ

13.7

 

Acute dose

NO3-free BRJ

Isokinetic knee extension

Dumar et al. 2021 [60]

10

20

BRJ

 

6.4

Acute dose

Otherc

Sprint cycling

  1. BRJ beetroot juice. aWater colored and flavored with blackcurrant juice. bWater colored and flavored with BRJ powder (1 g/L) and lemon juice. cUndiluted blackcurrant juice