scholarly journals The Effect of Vitamin D3 Supplementation on Physical Capacity among Active College-Aged Males

Nutrients ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1936 ◽  
Author(s):  
Sylwester Kujach ◽  
Dariusz Lyzwinski ◽  
Maciej Chroboczek ◽  
Dawid Bialowas ◽  
Jedrzej Antosiewicz ◽  
...  
Keyword(s):  
Placebo Group ◽  
Vitamin D3 ◽  
Anaerobic Power ◽  
Anaerobic Capacity ◽  
Physical Capacity ◽  
High Dose ◽  
Post Intervention ◽  
Wingate Anaerobic Test ◽  
Vitamin D3 Supplementation ◽  
Aerobic And Anaerobic

Vitamin D3 supplementation can affect strength and power; however, the effect on both aerobic and anaerobic performance remains unclear. Here, we investigate the effects of eight weeks of a high dose of vitamin D3 supplementation and its impact on circulating 25-hydroxyvitamin D (25-OH-D3) concentrations and selected indicators of physical capacity. Subjects (n = 28, age 21.1 ± 1.6) were divided into two groups: supplemented (SUP), which was given 6000 IU of vitamin D3 daily for eight weeks; and placebo group (PLA). Serum 25-OH-D3 concentrations were determined in pre- and post-intervention. Aerobic ( V . O2max test) and anaerobic (Wingate Anaerobic Test) capacity were determined before and after the supplementation. The mean baseline concentration of 25-OH-D3 was recognized as deficient (20 ng/mL) and significantly increased over time in the supplemented group (p < 0.01, η2 = 0.86), whilst it remained unchanged in the placebo group. Moreover, the supplementation caused a significant improvement in maximal aerobic (p < 0.05, η2 = 0.27) and anaerobic power (p < 0.01, η2 = 0.51) whereas no changes were observed in PLA group. The V . O2max differences were also significant in the supplemented group (p < 0.05). In summary, the changes in aerobic and anaerobic capacity observed in this study were associated with a serum concentration of 25-OH-D3. Our data imply that vitamin D3 supplementation with a dose of 6000 IU daily for eight weeks is sufficient to improve physical capacity and vitamin D3 status.

scholarly journals Vitamin D and Serum Cytokines in a Randomized Clinical Trial

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Eleanor Yusupov ◽  
Melissa Li-Ng ◽  
Simcha Pollack ◽  
James K. Yeh ◽  
Mageda Mikhail ◽  
...  
Keyword(s):  
Vitamin D ◽  
Placebo Group ◽  
Vitamin D3 ◽  
Intracellular Signaling ◽  
Final Visit ◽  
Active Vitamin ◽  
Gm Csf ◽  
Active Vitamin D ◽  
Significant Difference ◽  
Vitamin D3 Supplementation

Background. The role of vitamin D in the body's ability to fight influenza and URI's may be dependent on regulation of specific cytokines that participate in the host inflammatory response. The aim of this study was to test the hypothesis that vitamin D can influence intracellular signaling to regulate the production of cytokines.Subjects and Methods. This study was a 3-month prospective placebo-controlled trial of vitamin D3 supplementation in ambulatory adults [Li-Ng et al., 2009]. 162 volunteers were randomized to receive either 50 μg/d(2000 IU) of vitamin D3 or matching placebo. 25(OH)D and the levels of 10 different cytokines (IL-2, 4, 5, 6, 8, 10, 13, GM-CSF, IFN-γ, TNF-α) were measured in the serum of participants at baseline and the final visit. There were 6 drop-outs from the active vitamin D group and 8 from the placebo group.Results. In the active vitamin D group, we found a significant median percent decline in levels of GM-CSF (−62.9%,P<.0001), IFN-γ(−38.9%,P<.0001), IL-4 (−50.8%,P=.001), IL-8 (−48.4%,P<.0001), and IL-10 (−70.4%,P<.0001). In the placebo group, there were significant declines for GM-CSF (−53.2%,P=.0007) and IFN-γ(−34.4%,P=.0011). For each cytokine, there was no significant difference in the rate of decline between the two groups. 25(OH)D levels increased in the active vitamin D group from a mean of64.3±25.4 nmol/L to88.5±23.2 nmol/L.Conclusions. The present study did not show that vitamin D3 supplementation changed circulating cytokine levels among healthy adults.

scholarly journals Anaerobic Strength and Power in Master Athletes

2017 ◽  
Vol 01 (01) ◽  
pp. E30-E36 ◽  
Author(s):  
Jelena Gacesa
Keyword(s):  
Anaerobic Power ◽  
Anaerobic Capacity ◽  
Knee Extensors ◽  
Master Athletes ◽  
Wingate Anaerobic Test ◽  
Male Athletes ◽  
Group Iii ◽  
Contraction Velocity ◽  
Group I ◽  
Group Ii

AbstractThe study compared anaerobic capacity and power in master athletes of different ages, and correlated 2 different anaerobic tests. The study was conducted on 60 male athletes: group I 30–35 years (n1=35, age 32.23±1.53 y), group II 35–45 years (n2=15, age 39.17±3.60 y), group III above 46 years (n3=10, age 52.13±4.50 y). The Wingate anaerobic test and ergometry of elbow flexors, elbow extensors, and knee extensors were performed. Average peak anaerobic power (PP) in group I was 692.94±216.53 W, in group II 593.40±185.91 W, non-significantly lower by 14.4% (p>0.05). In group III, PP was 381.50±117.62 W, significantly lower by 44.9% when compared with group I (p≤0.001). Ergometry parameter of muscle strength and power showed greater decline with age (up to 32.3%) in comparison with contraction velocity (up to 14.1%). Significant correlation was registered between PP and ergometric parameter power for knee extensors (KE) (PP/KE power: r was 0.59 in group I, 0.85 in group II, and 0.90 in group III, p≤0.05). Master athletes represent an interesting population for studying the chronic effects of physical activity on functional capacity changes during ageing. Strength parameters “age” in different fashion, because the contraction velocity parameter is less influenced than strength by the muscle alterations with increasing age.

scholarly journals Short- and Long-Term Safety of Weekly High-Dose Vitamin D3 Supplementation in School Children

2008 ◽  
Vol 93 (7) ◽  
pp. 2693-2701 ◽  
Author(s):  
Joyce Maalouf ◽  
Mona Nabulsi ◽  
Reinhold Vieth ◽  
Samantha Kimball ◽  
Rola El-Rassi ◽  
...  
Keyword(s):  
School Children ◽  
Vitamin D3 ◽  
High Dose ◽  
Vitamin D3 Supplementation ◽  
Short And Long Term ◽  
High Dose Vitamin

Influence of the Cyclist’s Characteristics on the Optimal Pacing Strategy for an Ascending Road

2021 ◽  
Author(s):  
Manuel Angulo ◽  
Alejandra Polanco ◽  
Luis Muñoz
Keyword(s):  
Aerobic Capacity ◽  
Anaerobic Power ◽  
Anaerobic Capacity ◽  
Power Delivery ◽  
Race Time ◽  
Pacing Strategy ◽  
Pacing Strategies ◽  
Road Grade ◽  
Aerobic And Anaerobic ◽  
Drag Area

Abstract Pacing strategies are used in cycling to optimize the power delivered by the cyclist during a race. Gains in race time have been obtained when using these strategies compared to self-paced approaches. For this reason, this study is focused on revising the effect that the variation of the cyclist’s parameters has on the pacing strategy and its results. A numeric method was used to propose pacing strategies for a cyclist riding on an ascending 3.7 km route with a constant 6.26% road grade. The method was validated and then implemented to study the effect of aerobic and anaerobic power delivery capacity, mass, and drag area on the pacing strategies and their corresponding estimated race times. The results showed that modifying 1% of the aerobic capacity or cyclist mass value led to a change of 1% on the race time. Modifying 1% the anaerobic capacity and the drag area led to changes of 0.03% and 0.02% on the race time, respectively. These results are strongly dependent on the route characteristics. It was concluded that for the studied route (constantly ascending), the variation of the cyclist’s aerobic capacity influences the pacing strategy (i.e., the power delivery over the distance). The anaerobic capacity and mass of the cyclist also influence the pacing strategy to a lesser extent.

scholarly journals Metabolic consequences of β-alanine supplementation during exhaustive supramaximal cycling and 4000-m time-trial performance

2016 ◽  
Vol 41 (8) ◽  
pp. 864-871 ◽  
Author(s):  
Phillip M. Bellinger ◽  
Clare L. Minahan
Keyword(s):  
Oxygen Uptake ◽  
Power Output ◽  
Maximal Oxygen Uptake ◽  
Anaerobic Power ◽  
Anaerobic Capacity ◽  
Time Trial ◽  
Time To Exhaustion ◽  
Cycling Test ◽  
Cycling Time Trial ◽  
Aerobic And Anaerobic

The present study investigated the effects of β-alanine supplementation on the resultant blood acidosis, lactate accumulation, and energy provision during supramaximal-intensity cycling, as well as the aerobic and anaerobic contribution to power output during a 4000-m cycling time trial (TT). Seventeen trained cyclists (maximal oxygen uptake = 4.47 ± 0.55 L·min−1) were administered 6.4 g of β-alanine (n = 9) or placebo (n = 8) daily for 4 weeks. Participants performed a supramaximal cycling test to exhaustion (equivalent to 120% maximal oxygen uptake) before (PreExh) and after (PostExh) the 4-week supplementation period, as well as an additional postsupplementation supramaximal cycling test identical in duration and power output to PreExh (PostMatch). Anaerobic capacity was quantified and blood pH, lactate, and bicarbonate concentrations were measured pre-, immediately post-, and 5 min postexercise. Subjects also performed a 4000-m cycling TT before and after supplementation while the aerobic and anaerobic contributions to power output were quantified. β-Alanine supplementation increased time to exhaustion (+12.8 ± 8.2 s; P = 0.041) and anaerobic capacity (+1.1 ± 0.7 kJ; P = 0.048) in PostExh compared with PreExh. Performance time in the 4000-m TT was reduced following β-alanine supplementation (−6.3 ± 4.6 s; P = 0.034) and the mean anaerobic power output was likely to be greater (+6.2 ± 4.5 W; P = 0.035). β-Alanine supplementation increased time to exhaustion concomitant with an augmented anaerobic capacity during supramaximal intensity cycling, which was also mirrored by a meaningful increase in the anaerobic contribution to power output during a 4000-m cycling TT, resulting in an enhanced overall performance.

scholarly journals Pharmacokinetics of High-Dose Weekly Oral Vitamin D3 Supplementation during the Third Trimester of Pregnancy in Dhaka, Bangladesh

Nutrients ◽  
2013 ◽  
Vol 5 (3) ◽  
pp. 788-810 ◽  
Author(s):  
Daniel Roth ◽  
Abdullah Mahmud ◽  
Rubhana Raqib ◽  
Evana Akhtar ◽  
Robert Black ◽  
...  
Keyword(s):  
Vitamin D3 ◽  
High Dose ◽  
Third Trimester ◽  
Oral Vitamin ◽  
The Third ◽  
Vitamin D3 Supplementation

scholarly journals The Effects of Sprint Interval vs. Continuous Endurance Training on Physiological and Metabolic Adaptations in Young Healthy Adults

2014 ◽  
Vol 44 (1) ◽  
pp. 97-109 ◽  
Author(s):  
Gulbin Rudarli Nalcakan
Keyword(s):  
Lipid Profile ◽  
Endurance Training ◽  
Muscle Damage ◽  
Body Height ◽  
Anaerobic Power ◽  
Post Intervention ◽  
Blood Lipid Profile ◽  
Study Results ◽  
Aerobic And Anaerobic ◽  
Muscle Damage Markers

Abstract The purpose of this study was to compare the effects of sprint interval training (SIT) and continuous endurance training (CET) on selected anthropometric, aerobic, and anaerobic performance indices as well as the blood lipid profile, inflammatory and muscle damage markers in healthy young males. Fifteen recreationally active male volunteers (age: 21.7 ±2.2 years, body mass: 83.0 ±8.0 kg, body height: 1.82 ±0.05 m) were divided into two groups according to their initial VO2max levels. Training programs were conducted 3 times per week for 7 weeks. The SIT program consisted of 4-6 Wingate anaerobic sprints with a 4.5 min recovery, while CET consisted of 30-50 min cycling at 60% VO2max. Biochemical, anthropometric and fitness assessments were performed both pre and post-intervention. Significant improvements in VO2max, anaerobic power and capacity, and VO2 utilization during the submaximal workout and significant decreases in body fat and in waist circumference after the intervention occurred in both SIT and CET groups. Significantly greater gross efficiency was measured in the CET group. No differences in the lipid profile or serum levels of inflammatory, myocardial and skeletal muscle damage markers were observed after the training period. The study results agree with the effectiveness of a 30 s all-out training program with a reduced time commitment for anthropometric, aerobic and anaerobic adaptation and eliminate doubts about its safety as a model.

scholarly journals EFFECT OF ACUTE L-CARNITINE SUPPLEMENTATION ON BLOOD LACTATE, GLUCOSE, AEROBIC AND ANAEROBIC PERFORMANCE IN ELITE MALE ARTISTIC GYMNASTS

2017 ◽  
Vol 1 (104) ◽  
pp. 2-7
Author(s):  
Hamid Arazi ◽  
Mohammad Mehrtash
Keyword(s):  
Placebo Group ◽  
Blood Lactate ◽  
Anaerobic Power ◽  
Lactate Concentration ◽  
Anaerobic Exercise ◽  
Acid Oxidation ◽  
Anaerobic Performance ◽  
Carnitine Supplementation ◽  
Exercise Protocol ◽  
Aerobic And Anaerobic

Background. Probably L-Carnitine can induce the increase of Pyruvate dehydrogenase activity, decrease of lactic acid production and performance improvements due to the reinforcement of long chain fatty acid oxidation and stabilize of coASH to free COA. Based on this, the aim of our study was to investigate the effects of acute L-Carnitine supplementation on blood lactate, glucose, VO 2 max and anaerobic power in elite male artistic gymnasts. Methods. Eighteen male artistic gymnasts were randomly assigned to supplementation (n = 9) or placebo (n = 9) groups. In a double blind design, subjects participated in two tests with a break of one week between them. Subjects ingested 3 grams of L-Carnitine or placebo (maltodextrin) 90 minutes before aerobic and anaerobic exercise protocols. We used a 20 m shuttle run as an aerobic exercise protocol and running based anaerobic sprint test (RAST) as an anaerobic exercise protocol. Blood samples were collected 5 minutes pre and 4 minutes post-tests for the analysis of lactate and glucose. Results. L-Carnitine group had significantly lower lactate concentration than placebo group after tests (p < .05). L-Carnitine group had significantly higher blood glucose (p < .05) compared with placebo group, too. Also VO 2 max as well as mean and maximum power in L-Carnitine group were significantly higher than those in placebo group (p < .05). Conclusions. These findings indicated that acute oral supplementation of L-Carnitine can probably induce fatigue decrease and improvement of aerobic and anaerobic performance in elite male artistic gymnasts.

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