scholarly journals Does Consumption of Nitrate Containing Beetroot Juice Affect Indoor Rowing Performance in Males and Females?

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 1754-1754
Author(s):  
Giselle Greisman ◽  
June Kloubec ◽  
Alexandra Kazaks ◽  
Kelly Morrow ◽  
Cristen Harris

Abstract Objectives The nitrates found in beetroot juice (BR) are known to be a precursor of nitric oxide (NO). NO is a known vasodilator which allows more oxygen to travel in the blood and may improve muscle efficiency. This study aims to measure the effect of BR supplementation on performance on 500-meter row time for trained CrossFit athletes. Many past studies have analyzed the effect of BR on male athletes, this study aimed to include both males and females. Methods This study used a randomized, cross-over, double-blind, placebo-controlled design to measure 500-meter row time. Thirty athletes age 18–60 consumed either a 2.7 oz shot of BR (6.5 mmol nitrate) or a placebo nitrate-free beetroot juice (PL). Two hours later, they rowed 500 meters. After at least a seven-day washout period, athletes repeated the 500-meter row with either BR or PL for comparison. This study was performed from July 2019 – January 2020 and was conducted in Mercer Island, Washington. Results Ten males age 18.0 to 60.3 (median 47.7) and twenty females age 26.7 to 58.3 (median 43.8), participated in this study. Row times for the 500-meter row ranged from 88.2 seconds to 150.7 seconds. Data indicate that although 60% of all participants rowed faster with BR (mean 112.83 seconds), compared to PL (mean 113.40 seconds), the difference in the means of row times (−0.563) was not significant overall (P = 0.29). However, for the 10 males, row times were significantly faster (1.02 second difference, P = 0.04) on average with BR compared to PL. For the 20 females, the difference in mean row time (−0.335 seconds) was not significant (P = 0.66). Competitive rowers were defined as those who rowed under 110 seconds (N = 15). For competitive rowers (10 males, 5 females), row times were significantly faster with BR compared to PL (difference in means −0.94, P = 0.009). However, for those rowers, the P-value of drink * group was 0.015. Conclusions Dietary nitrate improved indoor rowing performance in males but not in females. In addition, competitive rowers were also significantly faster with BR, however, there may be an order bias, since there was significant interaction between beverage type and testing order. Food based nitrate supplements may increase rowing performance with male rowers. Funding Sources Supported by Bastyr Faculty Student Research Grant.

2020 ◽  
Vol 1 (2) ◽  
pp. 22-29
Author(s):  
Yulni Yulni ◽  
Veni Hadju ◽  
Burhanuddin Bahar ◽  
Citrakesumasari Citrakesumasari ◽  
Rahayu Indriasari ◽  
...  

The aim of this study was to determine the effect of Moringa oleifera leaf extract supplements, Moringa oleifera leaf extract plus royal jelly and placebo on hemoglobin levels in anemic pregnant women. This research is a randomized controlled double blind design study which was conducted in Polombangkeng Utara District, Takalar Regency for 2 months. The subjects of this study were pregnant women with anemia, the majority of which were 20-35 years old, primigravida parity, income less than UMR, unemployment, higher education, pregnancy distance of more than 2 years with p value> 0.05. Then divided into three groups, namely Moringa capsules plus royal jelly (KRJ) (n = 24), Moringa capsules (KTR) (n = 24) and placeco (PLC) (n = 21). Before and after the intervention, measurements of hemoglobin levels were carried out using the Hemocue tool and interviewing the characteristics of the respondents. The results showed that the average Hb level increased from each group (mean SD): KRJ 10.06 ± 0.75 to 11.42 ± 1.23, P = 0.001, KTR 10.40 ± 0.46 to 11.15 ± 0 , 90 P = 0.001 and PLC 10.43 ± 0.42 becomes 11.14 ± 0.88 P = 0.002. but there was no significant difference from the difference in the average increase in Hb levels in the three groups, but there was a tendency that KRJ was superior to the KTR and PLC groups with an increase of 1.36 gr / dl, KTR 0.75 gr / dl and PLC 0.71 gr / dl. So it can be concluded that KRJ is better than KTR and PLC in increasing Hb levels in anemic pregnant women in Takalar Regency.


2019 ◽  
Vol 3 (Supplement_1) ◽  
Author(s):  
Nicole Litwin ◽  
Hannah Van Ark ◽  
Shannon Hartley ◽  
Kiri Michell ◽  
Allegra Vazquez ◽  
...  

Abstract Objectives High-fat meal (HFM) consumption has been shown to impair postprandial endothelial function. Red beetroot juice (RBJ) contains polyphenols, betalains, carotenoids, ascorbic acid, and inorganic nitrate, and has been shown to improve endothelial function. This study investigated the acute and chronic effects of RBJ and its bioactive components on postprandial endothelial function. We hypothesized that a HFM would impair postprandial endothelial function, and that RBJ would attenuate this, in part, through increased circulating nitrate/nitrite (NOx) levels. Methods A 4-period randomized, double-blind, placebo-controlled crossover clinical trial was conducted. Fifteen overweight and obese middle-aged/older men and postmenopausal women underwent baseline (T0) assessment of endothelial function (via reactive hyperemia index, RHI) and collection of blood and saliva. Participants consumed one of the following 70 mL treatments (acute exposure): 1) RBJ, 2) nitrate-free RBJ (NF-RBJ), 3) placebo + nitrate (PBO + NIT), and 4) placebo (PBO), followed by a HFM. RHI was measured at 4 hours (T4) post-HFM, and blood and saliva were collected at 1 hour (T1), 2 hours (T2), and T4. Participants then consumed treatments daily for 4 weeks (chronic exposure), and all assessments were repeated before/after the HFM but without consuming treatments. Results No significant time or treatment effects were observed for RHI. Following acute and chronic exposure to RBJ and PBO + NIT, plasma NOx levels were higher at T0 (chronic only), T1, T2, and T4 compared to PBO and NF-RBJ (P < 0.001). After chronic exposure to RBJ, saliva NOx levels were higher at T0, T1, T2, and T4 compared to PBO and NF-RBJ (P < 0.001). Saliva NOx levels for PBO + NIT were higher than both PBO and NF-RBJ at T0 (P < 0.001), but only higher than NF-RBJ at T1 (P = 0.02), and higher than PBO at T4 (P = 0.02). Additionally, there was a time*treatment interaction for plasma and saliva NOx levels following 4 weeks of daily exposure to RBJ and PBO + NIT (P < 0.001). Conclusions The preliminary results of this study suggest that HFM consumption does not significantly impair postprandial endothelial function in this population. In addition, acute and chronic RBJ exposure does not significantly improve endothelial function despite increases in plasma and saliva NOx. Funding Sources Colorado Agricultural Experiment Station, NIFA, USDA.


2010 ◽  
Vol 5 (3) ◽  
pp. 412-416 ◽  
Author(s):  
Iñigo Mujika ◽  
Rafa González De Txabarri ◽  
David Pyne

Energicer is a new solution which purportedly increases evaporative cooling during exercise in the heat.Purpose:To evaluate the effect of Energicer on performance during indoor rowing in a warm environment.Methods:Eighteen highly trained rowers (age 23.3 ± 6.7 y, height 181.3 ± 6.0 cm, mass 76.7 ± 5.0 kg, peak aerobic power (PAP) 322.1 ± 24.3 W; mean ± SD) performed two indoor rowing trials at 25.0°C and 65.0% relative humidity. Each trial consisted of 10 min at 55% PAP, 5 min of rest, 10 min at 70% PAP, 10 min of rest, and 2000 m time trial. Subjects were randomly assigned to an experimental (COOL) or a placebo (PLA) condition, using a double-blind, crossover design. During COOL, subjects wore sweatbands soaked in Energicer on both forearms; during PLA, they wore identical sweatbands soaked in cool water. Physiological measures and rowing performance were analyzed in a post-test-only crossover design. Magnitude of the difference between treatments was interpreted using the Cohen’s effect statistic.Results:No substantial differences were observed in heart rate, blood lactate and RPE between treatments during the submaximal row (COOL 163 ± 10 bpm, 4.3 ± 1.0 mM, 14.5 ± 1.8; PLA 165 ± 11 bpm, 4.8 ± 1.4 mM, 14.6 ± 1.6) and the time trial (COOL 179 ± 9 bpm, 10.7 ± 2.3 mM, 20 ± 0; PLA 179 ± 10 bpm, 11.1 ± 2.2 mM, 20 ± 0). Time (419 ± 11 vs 420 ± 12 s), mean power (305 ± 24 vs 304 ± 26 W), sweat loss (1013 ± 186 vs 981 ± 161 mL) and pacing strategy during the time trial were similar in COOL and PLA. The magnitude of differences between treatments was trivial for all measured variables.Conclusion:Energicer failed to provide a substantial benefit during indoor rowing in a warm environment. Whether Energicer is beneficial during more prolonged exercise and/or under more stressful environmental conditions remains to be elucidated.


2002 ◽  
Vol 12 (3) ◽  
pp. 349-363 ◽  
Author(s):  
Grant David Brinkworth ◽  
Jonathan David Buckley ◽  
Pitre Collier Bourdon ◽  
Jason Paul Gulbin ◽  
Adrian Zachei David

A randomized, double-blind, placebo controlled design was used in which 13 elite female rowers, all of whom had competed at World Championships, were supplemented with 60 g · day−1 of either bovine colostrum (BC; n = 6) or concentrated whey protein powder (WP; n = 7) during 9 weeks of pre-competition training. All subjects undertook the study as a group and completed the same training program. Prior to, and after 9 weeks of supplementation and training, subjects completed an incremental rowing test (ROW1) on a rowing ergometer consisting of 3 3 4-min submaximal workloads and a 4-min maximal effort (4max), each separated by a 1-min recovery period. The rowing test was repeated after a 15-min period of passive recovery (ROW2). The 4max for ROW1 provided a measure of performance, and the difference between the 4max efforts of ROW1 and ROW2 provided an index of recovery. Blood lactate concentrations and pH measured prior to exercise and at the end of each workload were used to estimate blood buffer capacity (b). Food intake was recorded daily for dietary analysis. There were no differences in macronutrient intakes (p > .56) or training volumes (p > .99) between BC and WP during the study period. Rowing performance (distance rowed and work done) during 4max of ROW2 was less than ROW1 at baseline (p < .05) but not different between groups (p > .05). Performance increased in both rows by Week 9 (p < .001), with no difference between groups (p > .75). However, the increase was greatest in ROW2 (p < .05), such that by Week 9 there was no longer a difference in performance between the two rows in either group (p > .05). b was not different between groups for ROW1 at baseline (BC 38.3 ± 5.0, WP 38.2 ± 7.2 slykes; p > .05) but was higher in BC by Week 9 (BC 40.8 ± 5.9, WP 33.4 ± 5.3 slykes; p < .05). b for ROW2 followed the same pattern of change as for ROW1. We conclude that supplementation with BC improves b, but not performance, in elite female rowers. It was not possible to determine whether b had any effect on recovery.


e-CliniC ◽  
2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Fazriah F. Paputungan ◽  
Paulina N. Gunawan ◽  
Damajanty H. C. Pangemanan ◽  
Johanna A. Khoman

Abstract: Oral and dental treatment is considered to be scary that can causes anxiety. Gender is one of the factors that influence the anxiety due to restorative treatment especially in dental caries. This study was aimed to determine the difference in anxiety level based on gender in restorative treatment at RSGM Unsrat. This was an analytical study using a cross sectional design. Samples were obtained by using purposive sampling method. Levels of anxiety in males and females were measured by using questionnaire that had been tested for validity. The results showed 32 patients aged 18-65 years who received dental restorative treatment in year 2019 at RSGM Unsrat. Males were as many as females. The levels of anxiety due to the restorative treatment were as follows: not anxious (31.2%), mild (40.7%), moderate (28.1%), severe (0.0%), and very severe (0.0%). The unpaired t-test showed a p-value 0.000. In conclusion, there were differences in male and female anxiety levels due to restorative treatment at RSGM Unsrat; females were more anxious than males.Keywords: anxiety level, gender, restorative treatmentAbstrak: Pengobatan penyakit gigi dan mulut masih kurang diminati masyarakat karena dianggap menakutkan sehingga dapat menimbulkan kecemasan. Jenis kelamin merupakan salah satu faktor yang dapat memengaruhi kecemasan pada penumpatan gigi yang digunakan terutama pada karies gigi. Penelitian ini bertujuan untuk mengetahui perbedaan tingkat kecemasan berdasarkan jenis kelamin pada tindakan penumpatan gigi di RSGM Unsrat. Jenis penelitian ialah analitik dengan desain potong lintang dan menggunakan teknik purposive sampling. Tingkat kecemasan pada laki-laki dan perempuan diukur berdasarkan kuesioner pengukuran tingkat kecemasan yang telah teruji validitasnya. Pasien yang menerima tindakan penumpatan gigi di RSGM Unsrat berusia 18-65 tahun pada tahun 2019 berjumlah 32 orang dengan jumlah yang sama besar untuk kedua jenis kelamin. Hasil penelitian menunjukkan bahwa yang mengalami kecemasan pada tindakan penumpatan gigi kategori tidak cemas (31,2%), ringan (40,7%), sedang (28,1%), berat (0,0%), dan sangat berat (0,0%). Hasil analisis bivariat menggunakan uji statistik uji t tidak berpasangan menunjukkan nilai p=0,000. Simpulan penelitian ini ialah terdapat perbedaan tingkat kecemasan antara laki-laki dan perempuan pada tindakan penumpatan gigi di RSGM Unsrat. Kecemasan lebih banyak didapatkan pada perempuan.Kata kunci: tingkat kecemasan, jenis kelamin, penumpatan gigi


2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 788-788
Author(s):  
Annaliese Widmer ◽  
Alexa Evenson ◽  
Emily Heying ◽  
Joleen Barnett

Abstract Objectives The goals were to 1) determine the change in perceived hunger and perceived thirst when consuming carbonated, flavored, and artificially sweetened beverages and 2) to determine if carbonated beverage consumption habits predict perceived hunger and thirst. Methods Participants (males n = 14 and females n = 15) aged 23–65, BMI &lt; 30 kg/m,2 and not diagnosed with any chronic disease randomly consumed six different beverage treatments (water, carbonated - no flavor [CNF], carbonated - lime flavor [CL], degassed - lime flavor [DL], carbonated - lime flavor with aspartame [CLS], and degassed - lime flavor with aspartame [DLS]) in a single-blinded, cross-over design. Beverage consumption habits of participants were recorded at the first data collection appointment. Participants were asked to eat a breakfast of approximately 400 calories and a subsequent four hour fast on six separate days. A Visual Analog Scale (VAS) was used to measure perceived hunger and thirst at 0 (baseline), followed by beverage consumption, and then measured at 10 and 45 minutes post consumption. ANOVA was used to determine the difference in hunger and thirst perceptions by beverage. Regression determined the influence of beverage consumption habits perceived hunger and thirst at three different time points and the change in perceived hunger and thirst. Results Perceived hunger and thirst significantly changed over time (P &lt; 0.001) but did not differ by beverage (P &gt; 0.05). There was no interaction between time and beverage (P &gt; 0.05). Perceived hunger scores were 48.59 ± 18.37 and 54.89 ± 18.94 (mean ± SD) at baseline (0 min) and 45 min, respectively (P &lt; 0.0001). Perceived thirst scores were 54.00 ± 15.22 at baseline (0 min) and 46.37 ± 17.22 at 45 min (P &lt; 0.0001). Habitual frequency of carbonated beverage consumption did not influence change in perceived thirst, change in perceived hunger, baseline perceived hunger or baseline thirst in the study (P &gt; 0.05). Conclusions Perceived hunger significantly increased from baseline to 45-minutes, while perceived thirst significantly decreased from baseline to 45-min. Habitual frequency of consumption of carbonated beverages may have limited impact on changes in perceived hunger and thirst when consuming various beverages. Funding Sources College of Saint Benedict/Saint John's University Faculty Development Grant and CSB Undergraduate Research Grant.


Author(s):  
Suzana Pustivšek ◽  
Vedran Hadžić ◽  
Edvin Dervišević ◽  
Jamie Carruthers

AbstractPurposeThe objective of this research was to investigate the risk for eating disorders (EDs) and compare body composition in participants with and without risk in adolescent Slovenian athletes and aged matched controls.MethodsA total of 583 randomly selected adolescents, aged from 15 to 17 years, completed a sick, control, one stone, fat, food (SCOFF) questionnaire for detecting risk for EDs. Weight and body composition were measured using a bioelectrical impedance machine. Based on the data body mass index (BMI), percentiles were calculated.ResultsOverall, 37.7% of athletes and 39.8% of controls were classified as at risk for EDs. Girls showed a significantly higher frequency of risk than boys, 1:3.5. A higher percentage of underweight boys was found in control group compared to the athletes, but the difference was not significant in the subsample of girls. Differences in body composition show that the at-risk group had significantly higher values in BMI percentiles (p < 0.001) and percentages of fat mass (p < 0.001) and lower values in percentage of muscle mass (p < 0.01) and fat-free mass.ConclusionsThese finding demonstrate that the gap in risk for EDs between males and females is becoming smaller and stresses to consider specific parameters of body composition as being important when identifying at-risk groups for EDs.


e-CliniC ◽  
2019 ◽  
Vol 7 (2) ◽  
Author(s):  
Fazriah F. Paputungan ◽  
Paulina N. Gunawan ◽  
Damajanty H. C. Pangemanan ◽  
Johanna A. Khoman

Abstract: Oral and dental treatment is considered to be scary that can causes anxiety. Gender is one of the factors that influence the anxiety due to restorative treatment especially in dental caries. This study was aimed to determine the difference in anxiety level based on gender in restorative treatment at RSGM Unsrat. This was an analytical study using a cross sectional design. Samples were obtained by using purposive sampling method. Levels of anxiety in males and females were measured by using questionnaire that had been tested for validity. The results showed 32 patients aged 18-65 years who received dental restorative treatment in year 2019 at RSGM Unsrat. Males were as many as females. The levels of anxiety due to the restorative treatment were as follows: not anxious (31.2%), mild (40.7%), moderate (28.1%), severe (0.0%), and very severe (0.0%). The unpaired t-test showed a p-value 0.000. In conclusion, there were differences in male and female anxiety levels due to restorative treatment at RSGM Unsrat; females were more anxious than males.Keywords: anxiety level, gender, restorative treatmentAbstrak: Pengobatan penyakit gigi dan mulut masih kurang diminati masyarakat karena dianggap menakutkan sehingga dapat menimbulkan kecemasan. Jenis kelamin merupakan salah satu faktor yang dapat memengaruhi kecemasan pada penumpatan gigi yang digunakan terutama pada karies gigi. Penelitian ini bertujuan untuk mengetahui perbedaan tingkat kecemasan berdasarkan jenis kelamin pada tindakan penumpatan gigi di RSGM Unsrat. Jenis penelitian ialah analitik dengan desain potong lintang dan menggunakan teknik purposive sampling. Tingkat kecemasan pada laki-laki dan perempuan diukur berdasarkan kuesioner pengukuran tingkat kecemasan yang telah teruji validitasnya. Pasien yang menerima tindakan penumpatan gigi di RSGM Unsrat berusia 18-65 tahun pada tahun 2019 berjumlah 32 orang dengan jumlah yang sama besar untuk kedua jenis kelamin. Hasil penelitian menunjukkan bahwa yang mengalami kecemasan pada tindakan penumpatan gigi kategori tidak cemas (31,2%), ringan (40,7%), sedang (28,1%), berat (0,0%), dan sangat berat (0,0%). Hasil analisis bivariat menggunakan uji statistik uji t tidak berpasangan menunjukkan nilai p=0,000. Simpulan penelitian ini ialah terdapat perbedaan tingkat kecemasan antara laki-laki dan perempuan pada tindakan penumpatan gigi di RSGM Unsrat. Kecemasan lebih banyak didapatkan pada perempuan.Kata kunci: tingkat kecemasan, jenis kelamin, penumpatan gigi


2001 ◽  
Vol 6 (1) ◽  
pp. 15-25 ◽  
Author(s):  
Harald Walach ◽  
Stefan Schmidt ◽  
Yvonne-Michelle Bihr ◽  
Susanne Wiesch

We studied the effect of experimenter expectations and different instructions in a balanced placebo design. 157 subjects were randomized into a 2 × 4 factorial design. Two experimenters were led to expect placebos either to produce physiological effects or not (pro- vs. antiplacebo). All subjects except a control group received a caffeine placebo. They were either made to expect coffee, no coffee, or were in a double-blind condition. Dependent measures were blood pressure, heart rate, well-being, and a cognitive task. There was one main effect on the instruction factor (p = 0.03) with the group “told no caffeine” reporting significantly better well-being. There was one main effect on the experimenter factor with subjects instructed by experimenter “proplacebo” having higher systolic blood pressure (p = 0.008). There was one interaction with subjects instructed by experimenter “proplacebo” to receive coffee doing worse in the cognitive task than the rest. Subjects instructed by experimenter “antiplacebo” were significantly less likely to believe the experimental instruction, and that mostly if they had been instructed to receive coffee. Contrary to the literature we could not show an effect of instruction, but there was an effect of experimenters. It is likely, however, that these experimenter effects were not due to experimental manipulations, but to the difference in personalities.


2018 ◽  
Vol 2 (3) ◽  
pp. 111
Author(s):  
Aswindar Adhi Gumilang ◽  
Tri Pitara Mahanggoro ◽  
Qurrotul Aini

The public demand for health service professionalism and transparent financial management made some Puskesmas in Semarang regency changed the status of public health center to BLUD. The implementation of Puskesmas BLUD and non-BLUD requires resources that it can work well in order to meet the expectations of the community. The aim of this study is to know the difference of work motivation and job satisfaction of employees in Puskesmas BLUD and non-BLUD. Method of this research is a comparative descriptive with a quantitative approach. The object of this research are work motivation and job satisfaction of employees in Puskesmas BLUD and non-BLUD Semarang regency. This Research showed that Sig value. (P-value) work motivation variable was 0.019 smaller than α value (0.05). It showed that there was a difference of work motivation of employees in Puskemas BLUD and non-BLUD. Sig value (P-value) variable of job satisfaction was 0.020 smaller than α value (0.05). It showed that there was a difference of job satisfaction of BLUD and non-BLUD. The average of non-BLUD employees motivation were 76.59 smaller than the average of BLUD employees were 78.25. The average of job satisfaction of BLUD employees were 129.20 bigger than the average of non-BLUD employee were 124.26. Job satisfaction of employees in Puskesmas BLUD was higher than non-BLUD employees.


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