A study conducted by Dr. Craig Broeder of Exercising Nutritionally, used a randomized, double-blind, crossover, matched pair design to determine the acute effects of oral beet supplementation using HumanN beet product on lactate threshold, maximal sustainable power, and the ability to sustain anaerobic high-intensity interval work (HIIT).
Study Treatments – Both study treatments (Placebo and Beet Nitrate product) were provided by HumanN (Austin, Tx). The placebo contained natural beet flavoring, unsweetened caffeine free Kool-aid, and Sweet & Low. The study trial supplement was HumanN’s concentrated beet crystals.
Lactate Threshold Results
Lactate threshold significantly increased by 7.2% from 191.6 ± 37.3 watts during the placebo trial to 205.3 ± 39.9 watts while on HumanN beet supplementation (p = 0.01, ES = 0.40). Under placebo conditions, lactate threshold watts were 78.4% of FTP compared to the HumanN beet trials, which increased to 83.7% of each rider’s FTP.
Improvement in Lactate Threshold
The HIIT analyses showed that supplementation with HumanN beet product significantly improved time to exhaustion. (Placebo: 1,251 ± 562 secs, HumanN beet: 1,475 ± 504 secs; p = 0.02; ES = 0.423) and total energy expended (Placebo: 251.3 ± 48.6 secs, HumanN beet: 306.6 ± 55.2 kJ; p = 0.01; ES = 1.079) compared to placebo conditions (See figure 4).
Subjects during the HumanN beet trials completed more intervals (HumanN beet = 8.14 ± 2.4, Placebo = 7.00 ± 2.5, p = 0.03, ES = 0.42) and cycled 23.9% farther (HumanN beet = 13.5 ± 3.9 km, Placebo = 10.9 ± 4.0 km, p = 0.01, ES = 0.65).
Improvement in high intensity interval training (HIIT) work
Author: Dr. Craig Broeder of Exercising Nutritionally