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

Coggan, Andrew R.; Baranauskas, Marissa N.; Hinrichs, Rachel J.; Liu, Ziyue; Carter, Stephen J.

doi:10.1186/s12970-021-00463-z

Journal of the International Society of Sports Nutrition

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)
	N	Age (y)	Source	Measured	Assumed	Duration	Placebo	Test modality
Rothwell and Alkhatib 2014 [42]	12	21	BRJ		6.4	Acute dose	Other^a	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	Other^b	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	Other^b	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	Other^c	Sprint cycling

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

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