scholarly journals The Effects of Pre-Exercise High Energy Drink on Exercise Performance in Physically Active Men and Women

2011 ◽  
Vol 01 (01) ◽  
pp. 1-5
Author(s):  
Marko D. Stojanovic ◽  
Mirjana V. Stojanovic ◽  
Kristina Kanostrevac ◽  
Dragoljub Veljovic ◽  
Bojan Medjedovic ◽  
...  
Keyword(s):  
Exercise Performance ◽  
Energy Drink ◽  
High Energy ◽  
Physically Active ◽  
Men And Women

scholarly journals Acute Ingestion of a Novel Nitrate-Rich Dietary Supplement Significantly Increases Plasma Nitrate/Nitrite in Physically Active Men and Women

Nutrients ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1176
Author(s):  
Richard J. Bloomer ◽  
Matthew Butawan ◽  
Brandon Pigg ◽  
Keith R. Martin
Keyword(s):  
Nitric Oxide ◽  
Dietary Supplements ◽  
Exercise Performance ◽  
Physically Active ◽  
Men And Women ◽  
Blood Samples ◽  
Future Studies ◽  
Acute Ingestion ◽  
G 11 ◽  
Plasma Nitrate

Background: Dietary supplements purported to increase circulating nitric oxide are very popular among consumers. We determined the acute impact of two novel dietary supplements on plasma nitrate/nitrite (NOx) and nitrite alone. Methods: 20 men and women (age: 24 ± 5 years) ingested two different nitrate-rich supplements (Resync Recovery Blend at 7.5 g and 15 g; Resync Collagen Blend at 21 g), or placebo, on four different days. Fasting blood samples were obtained before and 75 min following ingestion and analyzed for NOx and nitrite. Results: Nitrite was not differently impacted by treatment (p > 0.05). The NOx response for men and women was very similar, with no sex interactions noted (p > 0.05). Condition (p < 0.0001), time (p < 0.0001), and condition x time (p < 0.0001) effects were noted for NOx. Values increased from baseline to post-ingestion for the Resync Recovery Blend at 7.5 g (11 ± 9 to 101 ± 48 µM) and at 15 g (9 ± 5 to 176 ± 91 µM), as well as for the Resync Collagen Blend (9 ± 9 to 46 ± 21 µM), while values for placebo remained stable (9 ± 7 to 8 ± 5 µM). Conclusion: While nitrite alone was not impacted by treatment, both Resync products result in an increase in plasma NOx, with the increase proportionate to the quantity of “nitric oxide blend” ingredients contained within each product. Future studies are needed to determine the physiological implications of the increased NOx, as pertaining to exercise performance and recovery, in addition to other aspects of human health.

Staying ‘stoked’: Surfing, ageing and post-youth identities

2017 ◽  
Vol 54 (4) ◽  
pp. 387-409 ◽  
Author(s):  
Belinda Wheaton
Keyword(s):  
Middle Age ◽  
Cultural Barriers ◽  
Physically Active ◽  
Men And Women ◽  
Male And Female ◽  
South West ◽  
Barriers And Challenges ◽  
Ways Of Being ◽  
Scholarly Attention ◽  
Equipment Performance

Surfing has consistently been framed as a youth focused, male-dominated sport and culture. Despite surfing’s ageing demographic, neither the ways in which age impacts on surfing identities and mobilities, nor older surfer’s experiences and subjectivities, has been given scholarly attention. In this paper, I discuss research exploring the experiences and identities of middle-aged and older recreational male and female surfers in the south and south-west of England. The research illustrates that participation in surfing as a sport and lifestyle remains highly significant for some men and women through middle-age and into retirement. I consider the cultural barriers and challenges in dealing with a loss in physical performance through ageing, such as adaptations to their equipment, performance, and style, and the implications for how individuals negotiate bodily capital, space and identity. Nonetheless, older surfers also embrace different ways of being a surfer which challenge some of the more exclusionary aspects of surfing identities. Theoretically the paper develops an intersectional approach to sporting identity that explicitly recognises and accounts for the contribution of age to social identity. The research also contributes to the growing literature on physically active ‘post-youth’ leisure lifestyles, illustrating how shifting definitions of ageing have given ‘rise to new expectations, priorities and understandings’ of sporting lifestyles amongst those in middle age, and beyond.

scholarly journals Effect of meal frequency and timing on physical performance

1997 ◽  
Vol 77 (S1) ◽  
pp. S91-S103 ◽  
Author(s):  
John A. Hawley ◽  
Louise M. Burke
Keyword(s):  
Liver Glycogen ◽  
High Energy ◽  
Physically Active ◽  
Post Exercise ◽  
Practical Strategy ◽  
Increase Energy Intake ◽  
Prolonged Training ◽  
Special Challenge ◽  
Cyclical Process ◽  
Eating Occasions

Two areas of sports nutrition in which the periodicity of eating has been studied relate to: (1) the habitually high energy intakes of many athletes, and (2) the optimization of carbohydrate(CHO) availability to enhance performance. The present paper examines how the timing and frequency of food and fluid intake can assist the athlete and physically-active person to improve their exercise performance in these areas. Frequent eating occasions provide a practical strategy allowing athletes to increase energy intake while concomitantly reducing the gastric discomfort of infrequent large meals. The optimization of CHO stores is a special challenge for athletes undertaking prolonged training or competition sessions. This is a cyclical process with post-exercise CHO ingestion promoting muscle and liver glycogen re-synthesis; pre-exercise feedings being practised to optimize substrate availability and feedings during exercise providing a readily-available source of exogenous fuel as endogenous stores become depleted. The timing and frequency of CHO intake at these various stages are crucial determinants for optimizing fuel availability to enhance exercise capacity.

The Effectiveness of Open Repair Versus Percutaneous Repair for an Acute Achilles Tendon Rupture

2016 ◽  
Vol 25 (4) ◽  
pp. 404-410 ◽  
Author(s):  
Heidi Krueger ◽  
Shannon David
Keyword(s):  
Achilles Tendon ◽  
Open Repair ◽  
Supporting Evidence ◽  
Clinical Scenario ◽  
Clinical Question ◽  
Bottom Line ◽  
Physically Active ◽  
Men And Women ◽  
Percutaneous Repair ◽  
Tendon Ruptures

Clinical Scenario:There are 2 approaches available for surgical repair of the Achilles tendon: open or percutaneous. However, there is controversy over which repair is superior.Focused Clinical Question:Which type of surgery is better in providing the best overall patient outcome, open or percutaneous repair, in physically active men and women with acute Achilles tendon ruptures?Summary of Search, “Best Evidence” Appraised, and Key Findings:The literature was searched for studies of level 3 evidence or higher that investigated the effectiveness of open repair versus percutaneous repair on acute Achilles tendon ruptures in physically active men and women. The literature search resulted in 3 studies for possible inclusion. All 3 good-quality studies were included.Clinical Bottom Line:There is supporting evidence to indicate that percutaneous repair is the best option for Achilles tendon surgery when it comes to the physically active population. Percutaneous repair has faster surgery times, less risk of complications, and faster recovery times over having an open repair, although it is acknowledged that every patient has a different situation and best individual option may vary patient to patient.

scholarly journals Effects of Bang® Keto Coffee Energy Drink on Metabolism and Exercise Performance in Resistance-Trained Adults: A Randomized, Double-blind, Placebo-controlled, Crossover Study

2020 ◽  
Vol 17 (1) ◽  
Author(s):  
Patrick S. Harty ◽  
Matthew T. Stratton ◽  
Guillermo Escalante ◽  
Christian Rodriguez ◽  
Jacob R. Dellinger ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Crossover Study ◽  
G Protein ◽  
Body Fat ◽  
Exercise Performance ◽  
Energy Drink ◽  
Double Blind ◽  
Double Blind Placebo ◽  
Muscular Performance ◽  
Time Point

Abstract Background Energy drinks are often consumed by the general population, as well as by active individuals seeking to enhance exercise performance and augment training adaptations. However, limited information is available regarding the efficacy of these products. Thus, the purpose of this study was to determine the effects of a commercially available caffeine- and protein-containing energy drink on metabolism and muscular performance. Methods Sixteen resistance-trained males (n = 8; mean ± SD; age: 22.4 ± 4.9 years; body mass: 78.8 ± 14.0 kg; body fat: 15.3 ± 6.4%) and females (n = 8; age: 24.5 ± 4.8 years; body mass: 67.5 ± 11.9 kg; body fat: 26.6 ± 7.1%) participated in this randomized, double-blind, placebo-controlled, crossover study. Following a familiarization visit, participants completed two identical visits to the laboratory separated by 5–10 days, each of which consisted of indirect calorimetry energy expenditure (EE) assessments before and after consumption of the beverage (Bang® Keto Coffee; 130 kcal, 300 mg caffeine, 20 g protein) or placebo (30 kcal, 11 mg caffeine, 1 g protein) as well as after exercise testing. In addition, participants’ subjective feelings of energy, fatigue, and focus as well as muscular performance (leg press one-repetition maximum and repetitions to fatigue, maximal isometric and isokinetic squat testing) were assessed. Multiple repeated measures ANOVAs with Tukey post-hoc tests were used to analyze data. Estimates of effect size were quantified via partial eta squared (ηP2) and Hedge’s g. Results A significant interaction effect was identified for EE (p < 0.001, ηP2 = 0.52) but not respiratory exchange ratio (p = 0.17, ηP2 = 0.11). Following consumption of the beverage, EE was 0.77 kcal·min− 1 greater than placebo at the post-beverage time point (p < 0.001) and 0.37 kcal·min− 1 greater than placebo at the post-exercise time point (p = 0.011). However, no between-condition differences were detected for any subjective or muscular performance outcomes. Conclusions The results of this study suggest that consumption of the energy drink had minimal effects on lower-body muscular performance and subjective factors in the context of a laboratory setting. However, the beverage was found to significantly increase energy expenditure compared to placebo immediately following ingestion as well as during the recovery period after an exercise bout, suggesting that active individuals may improve acute metabolic outcomes via consumption of a caffeine- and protein-containing energy drink. Trial registration This trial was prospectively registered at ClinicalTrials.gov (Identifier: NCT04180787; Registered 29 November 2019).

Smaller muscle ATP reduction in women than in men by repeated bouts of sprint exercise

2002 ◽  
Vol 93 (3) ◽  
pp. 1075-1083 ◽  
Author(s):  
Mona Esbjörnsson-Liljedahl ◽  
Kristina Bodin ◽  
Eva Jansson
Keyword(s):  
Muscle Fibers ◽  
Plasma Catecholamines ◽  
High Energy ◽  
Type I ◽  
High Energy Phosphates ◽  
Physically Active ◽  
Glycogen Accumulation ◽  
Repeated Sprints ◽  
Sprint Exercise ◽  
Freeze Dried

It was hypothesized that the reduction of high-energy phosphates in muscle after repeated sprints is smaller in women than in men. Fifteen healthy and physically active women and men with an average age of 25 yr (range of 19–42 yr) performed three 30-s cycle sprints (Wingate test) with 20 min of rest between sprints. Repeated blood and muscle samples were obtained. Freeze-dried pooled muscle fibers of types I and II were analyzed for high-energy phosphates and their breakdown products and for glycogen. Accumulation of plasma ATP breakdown products, plasma catecholamines, and blood lactate, as well as glycogen reduction in type I fibers, was all lower in women than in men during sprint exercise. Repeated sprints induced smaller reduction of ATP and smaller accumulation of IMP and inosine in women than in men in type II muscle fibers, with no gender differences in changes of ATP and its breakdown products during the bouts of exercise themselves. This indicates that the smaller ATP reduction in women than in men during repeated sprints was created during recovery periods between the sprint exercises and that women possess a faster recovery of ATP via reamination of IMP during these recovery periods.

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