Influence of Muscle Slack on High-Intensity Sport Performance

2016 ◽  
Vol 38 (5) ◽  
pp. 75-87 ◽  
Author(s):  
Bas Van Hooren ◽  
Frans Bosch
Keyword(s):  
High Intensity ◽  
Sport Performance

scholarly journals Perfectionism Patterns, Dark Personality, and Exercise Addiction Trend in High-Intensity Sports

2021 ◽  
Author(s):  
J. González-Hernández ◽  
R. Baños ◽  
R. Morquecho-Sánchez ◽  
H. A. Pineda-Espejel ◽  
J. L. Chamorro
Keyword(s):  
High Intensity ◽  
Sport Performance ◽  
Dark Triad ◽  
Cognitive Resources ◽  
Amateur Athletes ◽  
Exercise Addiction ◽  
The Subject ◽  
Exercise Addiction Inventory ◽  
Concern Over Mistakes ◽  
Evaluative Judgement

AbstractThe present work tries to describe the relationships among perfectionism, dark traits of personality, and exercise addiction and according to highly intense sports. Following research on perfectionism in sport, its dysfunctional facet is based on a continuous and negative cognitive-evaluative judgement about the difficulties to achieve the accomplishment of tasks or behaviors that improve their sport performance, describing how athletes configure altered thoughts or cognitive resources in their sport experiences. The Spanish versions of the Multidimensional Perfectionism Scale, the Short Dark Triad Scale, and the Exercise Addiction Inventory were applied in a sample of 462 Spanish amateur athletes (39.6% women and 60.4% men). The findings show that a more maladaptive perfectionist pattern (concern over mistakes and external criticism) is related to higher levels of dark personality traits and a greater risk of exercise addiction. However, there are no differences between runners and CrossFit users on the subject of perfectionism, dark traits, and exercise addiction scores.

scholarly journals The Effect of Tribulus Terrestris Supplementation on Inflammation, Oxidative Stress and Performance of Recreational Runners: Study Protocol for a Double-Blind Randomized Controlled Trial

2021 ◽  
Author(s):  
Marzieh Nejati ◽  
Parvin Dehghan ◽  
Mostapha Khani
Keyword(s):  
Oxidative Stress ◽  
High Intensity ◽  
Controlled Trial ◽  
Sport Performance ◽  
Tribulus Terrestris ◽  
Double Blind ◽  
Inflammatory Status ◽  
Recreational Runners ◽  
Anti Inflammatory ◽  
Exercise Induced

Abstract Background: High intensity and endurance exercises lead to exercise-induced oxidative stress (EIOS), exercise-induced muscle damage (EIMD), and inflammation, which are the influencing factors on muscle soreness, localized swelling, and sport performance. Therefore, the purpose of this study is to determine the effectiveness of Tribulus terrestris (TT) as an herbal supplement with antioxidant and anti-inflammatory properties on the nutritional, oxidative stress, and anti/inflammatory status, as well as the sport performance of recreational runners.Methods/design: This study is a double-blind, randomized, placebo-controlled trial, which will be conducted among recreational runners of Tabriz stadiums, Iran. Thirty-four recreational runners will be selected, and participants will be assigned randomly to two groups: to receive 500 mg TT supplement or placebo capsules twice daily for two weeks. Both groups will do the high-intensity interval training (HIIT) workouts during the study. Baseline and post-intervention body composition, muscle fatigue, and soreness parameters will be assessed. In addition, assessment of malondialdehyde (MDA), total antioxidant capacity (TAC), superoxide dismutase (SOD), high-sensitivity C-reactive protein (hs-CRP), interleukin-6 (IL-6), interleukin-10 (IL-10), creatine kinase (CK), lactate dehydrogenase (LDH), insulin-like growth factor-1 (IGF-1) and brain-derived neurotrophic factor (BDNF) will be done during three blood samplings.Discussion: This study will be the first to assess the potential effects of TT in recreational runners. Our results will contribute to the growing body of knowledge regarding TT supplementation on the nutritional, oxidative stress, anti/inflammatory status and sport performance in recreational runners.Trial registration: Iranian Registry of Clinical Trials (www.irct.ir) (ID: IRCT20150205020965N8). Registration date: 13 February 2021.

Multiple Effects of Caffeine on Simulated High-Intensity Team-Sport Performance

2005 ◽  
Vol 37 (11) ◽  
pp. 1998-2005 ◽  
Author(s):  
GENE R. STUART ◽  
WILL G. HOPKINS ◽  
CHRISTIAN COOK ◽  
SIMEON P. CAIRNS
Keyword(s):  
High Intensity ◽  
Team Sport ◽  
Sport Performance

High-Intensity Interval Training Shock Microcycle for Enhancing Sport Performance

2020 ◽  
Vol 34 (4) ◽  
pp. 1188-1196 ◽  
Author(s):  
Filippo Dolci ◽  
Andrew E. Kilding ◽  
Paola Chivers ◽  
Ben Piggott ◽  
Nicolas H. Hart
Keyword(s):  
High Intensity ◽  
Interval Training ◽  
Sport Performance ◽  
High Intensity Interval Training ◽  
High Intensity Interval

scholarly journals The Multimodal Nature of High-Intensity Functional Training: Potential Applications to Improve Sport Performance

Sports ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 33 ◽  
Author(s):  
Joao Falk Neto ◽  
Michael Kennedy
Keyword(s):  
High Intensity ◽  
Anaerobic Capacity ◽  
Metabolic Stress ◽  
Sport Performance ◽  
Muscular Endurance ◽  
Functional Training ◽  
Training Strategy ◽  
Training Interventions ◽  
Potential Applications ◽  
And Performance

Training for sports performance requires the development of multiple fitness components within the same program. In this context, training strategies that have the potential to concomitantly enhance metabolic and musculoskeletal fitness are of great value for athletes and coaches. The purpose of this manuscript is to review the current studies on high-intensity functional training (HIFT) and to assess how HIFT could be utilized in order to improve sport-specific performance. Studies on untrained and recreationally-active participants have led to positive results on aerobic power and anaerobic capacity, and muscular endurance, while results on muscular strength and power are less clear. Still, HIFT sessions can elicit high levels of metabolic stress and resistance training exercises are prescribed with parameters that can lead to improvements in muscular endurance, hypertrophy, strength, and power. As similar training interventions have been shown to be effective in the athletic population, it is possible that HIFT could be a time-efficient training intervention that can positively impact athletes’ performances. While the potential for improvements in fitness and performance with HIFT is promising, there is a clear need for controlled studies that employ this training strategy in athletes in order to assess its effectiveness in this population.

scholarly journals Improvement of Lipids and Reduction of Oxidative Stress With Octacosanol After Taekwondo Training

2019 ◽  
Vol 14 (9) ◽  
pp. 1297-1303 ◽  
Author(s):  
Sang-Ho Lee ◽  
Steven D. Scott ◽  
Elizabeth J. Pekas ◽  
Jeong-Gi Lee ◽  
Song-Young Park
Keyword(s):  
Oxidative Stress ◽  
Weight Loss ◽  
Exercise Training ◽  
Training Program ◽  
High Intensity ◽  
Density Lipoprotein ◽  
Sport Performance ◽  
High Intensity Exercise ◽  
Rapid Weight Loss ◽  
Group Time

Purpose: Athletes in combat sports undergo rapid changes in body weight prior to competition in order to gain a size advantage over their opponent. However, these large weight changes with concomitant high-intensity exercise training create poor lipid profiles and high levels of oxidative stress, which can be detrimental to health and sport performance. Therefore, the purpose of this study was to investigate the ability of the nutritional supplement octacosanol to combat the physiological detriments that occur in taekwondo players during rapid weight loss with high-intensity exercise training. Methods: A total of 26 male taekwondo players were randomly divided into 2 groups: An experimental group performed a 5% weight-loss and taekwondo training program with 40-mg octacosanol intake (OCT; n = 13) for 6 d, and a control group performed the same weight-loss and taekwondo training program with a placebo (CON; n = 13). Results: There were significant (P < .05) group × time interactions for low-density lipoprotein and triglycerides, which significantly decreased (Δ18 [5] mg/dL and Δ80 [7] mg/dL, respectively), and high-density lipoprotein, which significantly increased (Δ10 [7] mg/dL), in the OCT group compared with the CON group. There were also significant (P < .05) group × time interactions for superoxide dismutase (SOD), glutathione peroxidase (GPx), and malondialdehyde (MDA), with SOD increasing (Δ226 [121] U/gHb) in the OCT group, while GPx decreased (Δ20 [13] U/gHb) and MDA increased (Δ72 [0.04] nmol/mL) in the CON group. Conclusion: These results suggest that octacosanol may be a beneficial supplement to protect against the poor cholesterol levels and oxidative stress that occurs during taekwondo training.

A New High Intensity Grid Cap for RCA-EMU-3 Electron Microscopes

1968 ◽  
Vol 26 ◽  
pp. 316-317
Author(s):  
George Christov ◽  
Bolivar J. Lloyd
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
High Voltage ◽  
High Intensity ◽  
Electron Gun ◽  
Tungsten Filament ◽  
Fluorescent Screen ◽  
Electron Microscopes ◽  
Pass Through ◽  
Ground Potential

A new high intensity grid cap has been designed for the RCA-EMU-3 electron microscope. Various parameters of the new grid cap were investigated to determine its characteristics. The increase in illumination produced provides ease of focusing on the fluorescent screen at magnifications from 1500 to 50,000 times using an accelerating voltage of 50 KV.The EMU-3 type electron gun assembly consists of a V-shaped tungsten filament for a cathode with a thin metal threaded cathode shield and an anode with a central aperture to permit the beam to course the length of the column. The cathode shield is negatively biased at a potential of several hundred volts with respect to the filament. The electron beam is formed by electrons emitted from the tip of the filament which pass through an aperture of 0.1 inch diameter in the cap and then it is accelerated by the negative high voltage through a 0.625 inch diameter aperture in the anode which is at ground potential.

The biochemistry of drugs and doping methods used to enhance aerobic sport performance

2008 ◽  
Vol 44 ◽  
pp. 63-84 ◽  
Author(s):  
Chris E. Cooper
Keyword(s):  
Oxygen Uptake ◽  
Oxygen Content ◽  
Oxygen Delivery ◽  
Sport Performance ◽  
Blood Substitutes ◽  
Altitude Training ◽  
Blood Oxygen ◽  
Oxygen Carriers ◽  
Sports Performance ◽  
Blood Doping

Optimum performance in aerobic sports performance requires an efficient delivery to, and consumption of, oxygen by the exercising muscle. It is probable that maximal oxygen uptake in the athlete is multifactorial, being shared between cardiac output, blood oxygen content, muscle blood flow, oxygen diffusion from the blood to the cell and mitochondrial content. Of these, raising the blood oxygen content by raising the haematocrit is the simplest acute method to increase oxygen delivery and improve sport performance. Legal means of raising haematocrit include altitude training and hypoxic tents. Illegal means include blood doping and the administration of EPO (erythropoietin). The ability to make EPO by genetic means has resulted in an increase in its availability and use, although it is probable that recent testing methods may have had some impact. Less widely used illegal methods include the use of artificial blood oxygen carriers (the so-called ‘blood substitutes’). In principle these molecules could enhance aerobic sports performance; however, they would be readily detectable in urine and blood tests. An alternative to increasing the blood oxygen content is to increase the amount of oxygen that haemoglobin can deliver. It is possible to do this by using compounds that right-shift the haemoglobin dissociation curve (e.g. RSR13). There is a compromise between improving oxygen delivery at the muscle and losing oxygen uptake at the lung and it is unclear whether these reagents would enhance the performance of elite athletes. However, given the proven success of blood doping and EPO, attempts to manipulate these pathways are likely to lead to an ongoing battle between the athlete and the drug testers.

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