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Table 1 Summary of the results obtained in studies examining the impacts of beetroot juice supplements on intermittent high intensity exercise performance

From: Effects of beetroot juice supplementation on intermittent high-intensity exercise efforts

Reference Subjects Study design Dose Exercise test Results
Muggeridge et al. [38] Trained kayakers (male, n = 8) (VO2peak 49.0 ± 6.1 ml·kg·min−1) Single-blind, randomized, cross-over 5 mmol NO3 (180 min before) Kayak ergometer: 5 × 10 s sprint-rest 50 s +4% average power (420 ± 23 vs 404 ± 24 W)
Martin et al. [53] Recreation team sport players (male,n = 16) (VO2peak 47.2 ± 8.5 ml·kg·min−1) Double-blind, randomized, cross-over 6.4 mmol NO3 (120 min before) Cycle ergometer: sets until exhaustion of 8 s– rest 30 s −13% reps (13 ± 5 vs 15 ± 6) and −17% total work (49.2 ± 24.2 vs 57.8 ± 34.0 kJ)
Aucouturier et al. [54] Recreation team sport players (male, n = 12) (VO2peak 46.6 ± 3.4 ml·kg·min−1) Single-blind, randomized, cross-over 10.9 mmol NO3 (180 min before) Cycle ergometer: sets until exhaustion of 15 s at 170% MAP–rest 30 s +20% reps* (26.1 ± 10.7 vs 21.8 ± 8.0) and 18% total workload* (168.2 ± 60.2 vs 142.0 ± 46.8 kJ)
Buck et al. [55] Amateur team sport players (female, n = 13) (VO2peak not specified) Double-blind, randomized, Latin-square BJ: 6.4 mmol NO3 (6 days) BJ + SP: 6.4 mmol NO3 + 50 mg·kg lean mass SP (6 days) PRE, MID and POST simulation team sport matches: 6×(20 m sprint + rest 25 s) BJ: −0.2% total sprint time per set (69.8 ± 4.9 vs 69.97 ± 4.2) BJ + SP: −2% total sprint time per set (68.9 ± 5.1 vs 69.97 ± 4.2)
Thompson et al. [56] Recreation team sport players (male, n = 16) (VO2peak 50 ± 7 ml·kg·min−1) Double-blind, randomized, cross-over 12.8 mmol NO3 (7 days) MID and POST simulated team-sport matches: 2×[5×(6 s cycle ergometry sprint + rest 14 s)] 5% work volume at MID* (63 ± 20 vs 60 ± 18 kJ), 2% POST (60 ± 17 vs 59 ± 16 kJ) and 4% whole session* (123 ± 19 vs 119 ± 17 kJ)
Clifford et al. [57] Competition team sport players (male, n = 20) (VO2peak not specified) Double-blind, independent groups design 11.4 mmol NO3 (150 min before) 2xRST: 20×(30 m sprint–rest 30 s) -1% average sprint time RST1 (4.65 ± 0.3 vs 4.7 ± 0.2 s) and −2% RST2 (4.66 ± 0.2 vs 4.77 ± 0.2 s) and −2% fastest sprint RST1 (4.41 ± 0.2 vs 4.48 ± 0.1 s) and −3%RST2 (4.38 ± 0.2 vs 4.53 ± 0.2 s)
Mosher et al. [58] Recreation sport players (male, n = 12) (VO2peak not specified) Double-blind, randomized, cross-over 6.4 mmol NO3 (6 days) Bench press: 3×(maximum number reps at 60% 1 RM) + 19% weight lifted in session and improved no. of reps S1*, S2*, S3* and whole session. *improvements not specified
Rimer et al. [59] Competition sport players (male, n = 13) (VO2peak not specified) Double-blind, randomized, cross-over 11.2 mmol NO3 (150 min before) Isokinetic cycle ergometer: Wingate 30-s test -1% peak power (1173 ± 255 vs 1185 ± 249 W) and −1% total work (22.8 ± 4.8 vs 23 ± 4.8 W)
Wylie et al. [60] Recreation team sport players (male, n = 10) (VO2peak 58 ± 8 ml·kg·min−1) Double-blind, randomized, cross-over design 8.4 mmol NO3 (5 days) Cycle ergometer: 24 x (6 s sprint–rest 24 s) Cycle ergometer: 7 x (30 s sprint–rest 4 min) Cycle ergometer: 6 x (60 s sprint–rest 60 s) +5% mean average power* (568 ± 136 vs 539 ± 136 W) and +1% mean peak power (792 ± 159 vs 782 ± 154 W) in 24 x (6 s sprint–rest 24 s);−1% mean average power (558 ± 95 vs 562 ± 94 W) and −1% mean peak power (768 ± 157 vs 776 ± 142 W) in 7 x (30 s sprint–rest 4 min)
  1. BJ Beetroot juice, MID Half-time simulation match, n Sample size; no Number, NO 3 nitrate concentration in the drink, MAP Maximum aerobic power, POST End simulation match, PRE Before simulation match, Rep Repetition, RST Repeated sprint test, SP Sodium phosphate, VO 2peak Peak oxygen consumption, * statistically significant differences