Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 13 of 13
Full-Text Articles in Medicine and Health Sciences
Natural Killer Cell Numbers And Natural Killer Cytotoxic Activity After 6 Weeks Of Testosterone Enanthate Administration In Health Young Males, Sonya Marshall-Gradisnik, Shane Rogerson, Glen Deakin, Rudi Meir, Rosanne Coutts, Shi Zhou, Robert Weatherby
Natural Killer Cell Numbers And Natural Killer Cytotoxic Activity After 6 Weeks Of Testosterone Enanthate Administration In Health Young Males, Sonya Marshall-Gradisnik, Shane Rogerson, Glen Deakin, Rudi Meir, Rosanne Coutts, Shi Zhou, Robert Weatherby
Sonya Marshall-Gradisnik
No abstract provided.
Performance Enhancement And Urinary Detection After Short-Term Testosterone Enanthate Use, Glen Deakin, Shane Rogerson, Rudi Meir, Rosanne Coutts, Shi Zhou, Sonya Marshall-Gradisnik, Robert Weatherby
Performance Enhancement And Urinary Detection After Short-Term Testosterone Enanthate Use, Glen Deakin, Shane Rogerson, Rudi Meir, Rosanne Coutts, Shi Zhou, Sonya Marshall-Gradisnik, Robert Weatherby
Sonya Marshall-Gradisnik
Anabolic Androgenic Steroids (AAS) are prohibited substances in sport due to their ability to improve muscle strength and power. Usually athletes who abuse these substances dose in cycles of up to 8-12 weeks. Whether the effects require this length of time to manifest is unknown. Also unknown is the minimum dose required and whether sports drug testing laboratories are able to detect all cases of AAS use by athletes. PURPOSE: To determine if the AAS, testosterone enanthate could increase strength and athletic performance in 3-6 weeks and the use the T/E ratio screening measure could detect the use of the …
Psychological Improvements In Healthy Males After Eight Weeks Of Concentrated Bovine Colostrum Supplementation, Sonya Marshall-Gradisnik, Roxanne Sample, Lauren O'Leary, Roger Bronks, Robert Weatherby, Stephen Myers, Lesley Stevenson, Shi Zhou
Psychological Improvements In Healthy Males After Eight Weeks Of Concentrated Bovine Colostrum Supplementation, Sonya Marshall-Gradisnik, Roxanne Sample, Lauren O'Leary, Roger Bronks, Robert Weatherby, Stephen Myers, Lesley Stevenson, Shi Zhou
Sonya Marshall-Gradisnik
No abstract provided.
Effects Of Four Weeks Of Supplementation With Coenzyme Q10 On Aerobic Power And Exercise Economy, Shi Zhou, Yong Zhang, Allan Davie, Sonya Marshall-Gradisnik, Jianxiong Wang, Hu Hui, Don Brushett
Effects Of Four Weeks Of Supplementation With Coenzyme Q10 On Aerobic Power And Exercise Economy, Shi Zhou, Yong Zhang, Allan Davie, Sonya Marshall-Gradisnik, Jianxiong Wang, Hu Hui, Don Brushett
Sonya Marshall-Gradisnik
Coenzyme Q10 (CoQ10) plays several crucial roles in the body, mainly acting as a redox electron carrier in the mitochondria, being an essential antioxidant, and influencing the stability and function of membranes. Supplementation with CoQ10 has shown beneficial effects in cardiac and other types of patients. However, limited and conflicting information exists in the literature on performance-enhancing effects of CoQ10 in healthy and athletic populations. This study investigated the effects of four-week CoQ10 supplementation on aerobic power (VO2max) and exercise economy (oxygen consumption at steady state exercise) in six healthy, physically active men (mean age 29.7+/-SD7.2 years and VO2max 39.4+/-SD8.5 …
Muscle And Plasma Coenzyme Q10 Concentration, Aerobic Power And Exercise Economy Of Healthy Men In Response To Four Weeks Of Supplementation, Shi Zhou, Yong Zhang, Allan Davie, Sonya Marshall-Gradisnik, Hui Hu, Jianxiong Wang, Don Brushett
Muscle And Plasma Coenzyme Q10 Concentration, Aerobic Power And Exercise Economy Of Healthy Men In Response To Four Weeks Of Supplementation, Shi Zhou, Yong Zhang, Allan Davie, Sonya Marshall-Gradisnik, Hui Hu, Jianxiong Wang, Don Brushett
Sonya Marshall-Gradisnik
AIM: To investigate whether 4 weeks of oral supplementation with coenzyme Q10 (CoQ10) would increase its concentration in skeletal muscle, and affect aerobic power (VO2max) and oxygen consumption during submaximal exercise in healthy, physically active men. METHODS: Six volunteers with an average (+/-SD) age of 29.7+/-7.2 years and VO2max of 39.4+/-8.5 mL.kg-1.min-1, participated in a single-blind trial. The experiment consisted of 4 2-week phases, in the order of placebo run-in, CoQ10 supplementation (150 mg daily), CoQ10 (150 mg) plus vitamin E (1,000 IU daily), and placebo wash-out. A three-stage cycle economy test (4 minutes at each of 50, 100, and …
The Effect Of Tribulus Terrestris On Urinary Steroid Profiles And The Physiological Adaptations To Pre-Season Training In Elite Rugby League Players, Shane Rogerson, Christopher Riches, Carl Jennings, Robert Weatherby, Rudi Meir, Sonya Marshall-Gradisnik
The Effect Of Tribulus Terrestris On Urinary Steroid Profiles And The Physiological Adaptations To Pre-Season Training In Elite Rugby League Players, Shane Rogerson, Christopher Riches, Carl Jennings, Robert Weatherby, Rudi Meir, Sonya Marshall-Gradisnik
Sonya Marshall-Gradisnik
No abstract provided.
Exercise-Improved Walking Capacity In Patients With Peripheral Arterial Disease: Effects And Mechanisms, Jianxiong Wang, Shi Zhou, Sonya Marshall-Gradisnik, Roger Bronks, John Graham, Stephen Myers
Exercise-Improved Walking Capacity In Patients With Peripheral Arterial Disease: Effects And Mechanisms, Jianxiong Wang, Shi Zhou, Sonya Marshall-Gradisnik, Roger Bronks, John Graham, Stephen Myers
Sonya Marshall-Gradisnik
Peripheral arterial disease (PAD) is an atherosclerotic disease. The most common symptom of PAD is intermittent claudication, a severe muscular pain in the lower limbs when walking. This symptom seriously deteriorates walking capacity and quality of life of PAD patients. It has been reported that exercise training can effectively enhance walking capacity in PAD patients. However, the mechanisms underlying the improved walking capacity have not been fully understood. The purpose of this study was to investigate some of the possible mechanisms using multi-disciplinary approaches. It has also been reported that an herbal medicine, ginkgo biloba extract, can improve peripheral circulation. …
Sports Medicine Australia Young Investigator Award: Natural Killer Cell Numbers And Natural Killer Cytotoxic Activity After Six Weeks Of Testosterone Enanthate Administration In Healthy Young Males, Sonya Marshall-Gradisnik, Shane Rogerson, Glen Deakin, Rosanne Coutts, Rudi Meir, Shi Zhou, Robert Weatherby
Sports Medicine Australia Young Investigator Award: Natural Killer Cell Numbers And Natural Killer Cytotoxic Activity After Six Weeks Of Testosterone Enanthate Administration In Healthy Young Males, Sonya Marshall-Gradisnik, Shane Rogerson, Glen Deakin, Rosanne Coutts, Rudi Meir, Shi Zhou, Robert Weatherby
Sonya Marshall-Gradisnik
PURPOSE: Androgenic-anabolic steroids (AAS) are beneficial for athletic performance (Giorgi et al., 1999). However, there is a paucity of literature that has examined the role of AAS, in particular, testosterone enanthate (TE), on immune function. METHODS: Fifteen healthy young males (mean age 24.8 ± 5.2) were randomly assigned in a double blind method to either a 3.5mg/kg TE (mean age 24.8 ± 5.1; n = 8) or placebo (mean age 26.1 ± 3.4; n = 7) weight training (WT) group. The study was conducted over six weeks and acute immune variables were assessed at week 0 (W0) and week 6 …
The Effect Of Short-Term Use Of Testosterone Enanthate On Muscular Strength And Power In Healthy Young Males, Shane Rogerson, Robert Weatherby, Glen Deakin, Rudi Meir, Rosanne Coutts, Shi Zhou, Sonya Marshall-Gradisnik
The Effect Of Short-Term Use Of Testosterone Enanthate On Muscular Strength And Power In Healthy Young Males, Shane Rogerson, Robert Weatherby, Glen Deakin, Rudi Meir, Rosanne Coutts, Shi Zhou, Sonya Marshall-Gradisnik
Sonya Marshall-Gradisnik
Use of testosterone enanthate has been shown to significantly increase strength within 6–12 weeks of administration (2, 9), however, it is unclear if the ergogenic benefits are evident in less than 6 weeks. Testosterone enanthate is classified as a prohibited substance by the World Anti-Doping Agency (WADA) and its use may be detected by way of the urinary testosterone/epitestosterone (T/E) ratio (16). The two objectives of this study were to establish (a) if injection of 3.5 mg·kg−1 testosterone enanthate once per week could increase muscular strength and cycle sprint performance in 3–6 weeks; and (b) if the WADA-imposed urinary T/E …
Improvements In Psychological Indicators In Healthy Males After Eight-Week Concentrated Bovine Colostrum Supplementation, Roxanne Sample, Lauren O'Leary, Roger Bronks, Robert Weatherby, Shi Zhou, Stephen Myers, Lesley Stevenson, Sonya Marshall-Gradisnik
Improvements In Psychological Indicators In Healthy Males After Eight-Week Concentrated Bovine Colostrum Supplementation, Roxanne Sample, Lauren O'Leary, Roger Bronks, Robert Weatherby, Shi Zhou, Stephen Myers, Lesley Stevenson, Sonya Marshall-Gradisnik
Sonya Marshall-Gradisnik
No abstract provided.
The Effect Of 5 Weeks Tribulus Terrestris Supplementation On Muscle Strength And Body Compostition During Pre-Season Training In Elite League Players, Shane Rogerson, Christopher Riches, Carl Jennings, Robert Weatherby, Rudi Meir, Sonya Marshall-Gradisnik
The Effect Of 5 Weeks Tribulus Terrestris Supplementation On Muscle Strength And Body Compostition During Pre-Season Training In Elite League Players, Shane Rogerson, Christopher Riches, Carl Jennings, Robert Weatherby, Rudi Meir, Sonya Marshall-Gradisnik
Sonya Marshall-Gradisnik
Tribulus terrestris is an herbal nutritional supplement that is promoted to produce large gains in strength and lean muscle mass in 5–28 days (15, 18). Although some manufacturers claim T. terrestris will not lead to a positive drug test, others have suggested that T. terrestris may increase the urinary testosterone/epitestosterone (T/E) ratio, which may place athletes at risk of a positive drug test. The purpose of the study was to determine the effect of T. terrestris on strength, fat free mass, and the urinary T/E ratio during 5 weeks of preseason training in elite rugby league players. Twenty-two Australian elite …
Natural Killer Cell Activity Following 6 Weeks Of Strength Training In Healthy Young Males With/Without Testosterone Enanthate Administration, Sonya Marshall-Gradisnik, Robert Weatherby, Glen Deakin, Rosanne Coutts, Rudi Meir, Paul Connellan, Lesley Stevenson, Shane Rogerson, Shi Zhou
Natural Killer Cell Activity Following 6 Weeks Of Strength Training In Healthy Young Males With/Without Testosterone Enanthate Administration, Sonya Marshall-Gradisnik, Robert Weatherby, Glen Deakin, Rosanne Coutts, Rudi Meir, Paul Connellan, Lesley Stevenson, Shane Rogerson, Shi Zhou
Sonya Marshall-Gradisnik
There is limited information on the acute immune response to resistance-training programs in combination with short-term administration of the anabolic androgenic steroid, testosterone enanthate (TE), in healthy young males. Eighteen healthy young men were match-paired and randomly assigned in a double-blind manner to either a TE or a placebo (PG) group. All subjects performed a structured resistance-training program while receiving injection of either TE at the dosage of 3.5 mg per kilogram body mass, or saline as placebo, once weekly for 6 weeks. A 10-second all-out cycle sprint test was conducted at the beginning (Week 0) and end (Week 6) …
Muscle And Plasma Coenzyme Q10 Concentrations And Aerobic Power In Response To Four Weeks Supplementation, Shi Zhou, Yong Zhang, Hui Hu, Allan Davie, Sonya Marshall-Gradisnik, Don Brushett
Muscle And Plasma Coenzyme Q10 Concentrations And Aerobic Power In Response To Four Weeks Supplementation, Shi Zhou, Yong Zhang, Hui Hu, Allan Davie, Sonya Marshall-Gradisnik, Don Brushett
Sonya Marshall-Gradisnik
Coenzyme Q10 (CoQ10) supplementation has been used by healthy and athletic populations with an expectation of enhancing aerobic performance. However, limited and conflicting information exists in the literature on whether the supplementation can increase physical performance in relation to muscle concentrations of CoQ10. This study investigated the effect of four weeks oral supplementation on muscle and plasma CoQ10 concentrations in six healthy, physically active men (age range 19-40), in a self-control, single-blind manner. Participants started with a two-week placebo run-in phase, followed by two weeks of CoQ10 supplementation at a daily dosage of 150 mg, then two weeks of CoQ10 …