4 research outputs found
Effect of acute isotonic beetroot juice supplementation on maximal power in physically active individuals
No full textBeetroot juice (BRJ) is a popular supplement reported to enhance sporting performance due to its high nitrate content. However, evidence is equivocal regarding the effect of BRJ on maximal power, warranting further research. New evidence suggests that isotonic beverages significantly increase salivary secretion, which may enhance the activation of nitrate. Hence, the combined effect of isotonic drinks and BRJ may induce greater enhancements in maximal power. This study primarily aims to investigate the differences between the effects of acute isotonic BRJ and normal BRJ supplementation on maximal power in physically active individuals through maximum countermovement jump with arm swing (CMJAS) and
standing broad jump (SBJ), hypothesising a significant difference. Twenty-three individuals participated in a double-blind, randomised, crossover research. Participants completed two experimental trials conducted at least five days apart under either Condition BR or ISO-CB, in which they ingested two 285ml bottles of BRJ or isotonic BRJ respectively. A three-hour rest period was then administered before participants completed a five-minute warm-up followed by exercise testing, which included three CMJAS and SBJ, each separated by a 30-second break. The maximum CMJAS height and SBJ distance was retained for data analyses. No significant differences in the maximum CMJAS height (p=0.337, d=-0.205) and SBJ distance (p=0.828, d=0.046) across both conditions were reported. Hence, isotonic BRJ appears to add no significant benefit to maximal power. Future studies investigating the effect of isotonic BRJ on maximal power and other exercise performance measures should be conducted to form stronger conclusions.
Keywords: beetroot, nitrate, isotonic, supplementation, powerBachelor of Science (Sport Science and Management
Effects of an isotonic beetroot drink on power output during sprint exercise and jump performance in physically active individuals: A randomized crossover trial
No full textExogenous nitrate ingestion can improve exercise performance. This study investigated whether an isotonic beetroot drink could improve jump and sprint performance in active individuals. Twenty-three physically active participants (17 males, 6 females) (mean ± SD; age: 26 ± 4 years; body mass index: 22.4 ± 1.9 kg/m2) completed a double-blind, randomized, cross-over study where they consumed 570mL of either beetroot juice drink (BR) or isotonic beetroot juice drink (ISO-BR) three hours before performing countermovement (CMJ) and standing broad jump (SBJ) tests and a 30-second all-out sprint on a cycle ergometer. Both drinks contained equal nitrate (12.9 mmol) and carbohydrate (6.1g per 100mL) content but differed in osmolality (BR: 420 mOsm/kg vs. ISO-BR: 315 mOsm/kg). Salivary total nitrate and nitrite concentrations (NOx) 3 hours post-ingestion were significantly higher after consuming ISO-BR than BR. ISO-BR significantly improved peak power output compared to BR by 3.9% (ISO-BR: 11.4 ± 2.5 W/kg vs. BR: 11.0 ± 2.3 W/kg, p = .04) but not time to peak power (ISO-BR: 2.8 ± 1.7 s vs. BR: 2.9 ± 1.6 s, p = .62) or mean power output (ISO-BR: 7.3 ± 1.5 W/kg vs. BR: 7.3 ± 1.5 W/kg, p = .37). There were no significant differences in CMJ or SBJ between trials (p > .05). Sensory evaluation indicated that ISO-BR was preferred by 91% (n = 21) of participants compared with BR (average score; ISO-BR: 5.52 vs. BR: 3.52, p < .05). An ISO-BR drink improved peak power output during sprint cycling but not jump performance compared with BR alone, potentially via increased NOx.Published versio
Related Data for: Effects of an isotonic beetroot drink on power output during sprint exercise and jump performance in physically active individuals: A randomized crossover trial
No full textExogenous nitrate ingestion can improve exercise performance. This study investigated whether an isotonic beetroot drink could improve jump and sprint performance in active individuals. Twenty-three physically active participants (17 males, 6 females) (mean ± SD; age: 26 ± 4 years; body mass index: 22.4 ± 1.9 kg/m2) completed a double-blind, randomized, cross-over study where they consumed 570mL of either beetroot juice drink (BR) or isotonic beetroot juice drink (ISO-BR) three hours before performing countermovement (CMJ) and standing broad jump (SBJ) tests and a 30-second all-out sprint on a cycle ergometer. Both drinks contained equal nitrate (12.9 mmol) and carbohydrate (6.1g per 100mL) content but differed in osmolality (BR: 420 mOsm/kg vs. ISO-BR: 315 mOsm/kg). Salivary total nitrate and nitrite concentrations (NOx) 3 hours post-ingestion were significantly higher after consuming ISO-BR than BR. ISO-BR significantly improved peak power output compared to BR by 3.9% (ISO-BR: 11.4 ± 2.5 W/kg vs. BR: 11.0 ± 2.3 W/kg, p = .04) but not time to peak power (ISO-BR: 2.8 ± 1.7 s vs. BR: 2.9 ± 1.6 s, p = .62) or mean power output (ISO-BR: 7.3 ± 1.5 W/kg vs. BR: 7.3 ± 1.5 W/kg, p = .37). There were no significant differences in CMJ or SBJ between trials (p > .05). Sensory evaluation indicated that ISO-BR was preferred by 91% (n = 21) of participants compared with BR (average score; ISO-BR: 5.52 vs. BR: 3.52, p < .05). An ISO-BR drink improved peak power output during sprint cycling but not jump performance compared with BR alone, potentially via increased NOx
Timing of caffeine ingestion does not improve three-point shooting accuracy in college basketball players
No full textThis study investigated the effects of the timing of caffeine (3 mg/kg body mass) ingestion on three-point shooting accuracy and other performance parameters during a basketball exercise simulation test (BEST). Eighteen college basketball players (mean ± SD: age = 24.4 ± 1.5 years, height = 181.7 ± 9.5 cm, body mass = 80.9 ± 13.2 kg) underwent one familiarization trial and three main conditions in a randomized order: (a) placebo (maltodextrin) and placebo, (b) caffeine and placebo, and (c) placebo and caffeine. Participants ingested either the placebo or caffeine pill 75 and 15 min before performing four quarters of the BEST and a three-point shooting protocol. During each quarter, participants completed 16 rounds of the BEST and ten three-point shots. Vertical jump height, 6 m sprint timing, BEST completion timing, three-point shooting accuracy, heart rate, rate of perceived exertion, blood glucose, blood lactate, and psychological measures pertaining to performance were measured. The BEST completion timing differed among conditions (placebo and placebo = 26.4 ± 2.0 s, caffeine and placebo = 25.8 ± 2.0 s, placebo and caffeine = 25.9 ± 2.1 s; p = .031) but not three-point shooting accuracy (placebo and placebo = 12.33 ± 4.10; caffeine and placebo = 12.61 ± 2.81; placebo and caffeine = 11.67 ± 3.77; p = .648), vertical jump height, or sprint times. Manipulating ingestion timing of caffeine did not improve three-point shooting accuracy, vertical jump height, or 6 m sprint timings, but caffeine can improve performance times during simulated basketball exercise irrespective of ingestion timing.Accepted versio
