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Charles H Tegeler, Catherine L Tegeler, Jared F Cook, Sung W Lee, Lee Gerdes, Hossam A Shaltout, Christopher M Miles, Sean L Simpson
BACKGROUND: Effective interventions are needed for individuals with persisting post-concussion symptoms. High-resolution, relational, resonance-based, electroencephalic mirroring (HIRREM®) is an allostatic, closed-loop, acoustic stimulation neurotechnology, designed to facilitate relaxation and self-optimization of neural oscillations. METHODS: Fifteen athletes (seven females, mean age 18.1 years, SD 2.6) with persisting post-concussion symptoms received 18.7 (SD 6...
December 2016: Sports Medicine—Open
Alcino D Carvalho, José A Rodrigues Santos
BACKGROUND: Previous studies have shown that total-body resistance training (RT) performed two to three alternating days per week has positive effects on muscle strength and body composition. However, no evidence exists to determine if total-body RT workouts done on consecutive days (CD) are beneficial. Therefore, the purpose of this study was to compare the effects of a total-body RT program performed on three con- secutive or nonconsecutive days (NCD) per week for 7 weeks on maximum strength and body composition in recreationally trained subjects...
September 29, 2016: Journal of Sports Medicine and Physical Fitness
J L Ayers, M DeBeliso, T G Sevene, K J Adams
Olympic weightlifting movements and their variations are believed to be among the most effective ways to improve power, strength, and speed in athletes. This study investigated the effects of two Olympic weightlifting variations (hang cleans and hang snatches), on power (vertical jump height), strength (1RM back squat), and speed (40-yard sprint) in female collegiate athletes. 23 NCAA Division I female athletes were randomly assigned to either a hang clean group or hang snatch group. Athletes participated in two workout sessions a week for six weeks, performing either hang cleans or hang snatches for five sets of three repetitions with a load of 80-85% 1RM, concurrent with their existing, season-specific, resistance training program...
September 2016: Biology of Sport
B T Crewther, J Carruthers, L P Kilduff, C E Sanctuary, C J Cook
To advance our understanding of the hormonal contribution to athletic performance, we examined the temporal associations between individual changes in testosterone (T) and/or cortisol (C) concentrations, training motivation and physical performance in elite and non-elite trained men. Two male cohorts classified as elites (n = 12) and non-elites (n = 12) completed five testing sessions over a six-week period. The athletes were tested for salivary T, C, T/C ratio, self-perceived training motivation, countermovement jump (CMJ) height and isometric mid-thigh pull peak force (IMTP PF), after which an actual training workout was performed...
September 2016: Biology of Sport
Ramires A Tibana, Leonardo M de Almeida, Nuno M Frade de Sousa, Dahan da Cunha Nascimento, Ivo V de Sousa Neto, Jeeser A de Almeida, Vinicius C de Souza, Maria de Fátima T P L Lopes, Otávio de Tolêdo Nobrega, Denis C L Vieira, James W Navalta, Jonato Prestes
The aim of this study was to investigate the effects of two consecutive Crossfit® training sessions (24 h apart) designed to enhance work-capacity that involved both cardiovascular and muscular exercises on cytokines, muscle power, blood lactate and glucose. Nine male members of the CrossFit® community (age 26.7 ± 6.6 years; body mass 78.8 ± 13.2 kg; body fat 13.5 ± 6.2%; training experience 2.5 ± 1.2 years) completed two experimental protocols (24 h apart): (1) strength and power exercises, (2) gymnastic movements, and (3) metabolic conditioning as follows: 10 min of as many rounds as possible (AMRAP) of 30 double-unders and 15 power snatches (34 kg)...
2016: Frontiers in Physiology
Nic Martinez, Bill Campbell, Madison Franek, Laura Buchanan, Ryan Colquhoun
BACKGROUND: Consumption of pre-workout dietary supplements by both recreational and competitive athletes has increased dramatically in recent years. The purpose of this study was to determine the acute effects of a caffeine-containing pre-workout dietary supplement on various measures of performance including anaerobic power, upper and lower body power, and upper body strength in recreationally trained males. METHODS: Thirteen males (mean ± SD age = 24 ± 6 yrs; height = 180...
2016: Journal of the International Society of Sports Nutrition
Y P Jung, M Koozechian, A O'Connor, S Shin, P B Collins, R Dalton, T Grubic, R Sowinski, B K Sanchez, A Coletta, M Cho, A Reyes, C Rasmussen, P S Murano, M Greenwood, C P Earnest, R B Kreider
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
Majid S Koozehchian, P Blaise Collins, Abigail O'Connor, Song Yi Shin, Ryan Dalton, Tylor Grubic, Ryan Sowinski, Y Peter Jung, Brittany K Sanchez, Adriana Coletta, Minye Cho, Aimee Reyes, Chris Rasmussen, Conrad P Ernest, Peter S Murano, Mike Greenwood, Richard B Kreider
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
Sarah A Costigan, Narelle Eather, Ronald C Plotnikoff, Charles H Hillman, David R Lubans
PURPOSE: Emerging literature suggests that physical activity and fitness may have a positive effect on cognitive and mental health in adolescents. The purpose of the current study was to evaluate the efficacy of two high-intensity interval training (HIIT) protocols for improving cognitive and mental health outcomes (executive function, psychological well-being, psychological distress, and physical self-concept) in adolescents. METHODS: Participants (n = 65; mean age = 15...
October 2016: Medicine and Science in Sports and Exercise
Andrew R Jagim, Margaret T Jones, Glenn A Wright, Carly St Antoine, Attila Kovacs, Jonathan M Oliver
BACKGROUND: Multi-ingredient pre-workout supplements (MIPS) are popular among resistance trained individuals. Previous research has indicated that acute MIPS ingestion may increase muscular endurance when using a hypertrophy-based protocol but less is known in regard to their effects on strength performance and high intensity running capacity. Therefore, the purpose was to determine if short-term, MIPS ingestion influences strength performance and anaerobic running capacity. METHODS: In a double-blind, randomized, placebo controlled, crossover design; 12 males (19 ± 1 yrs...
2016: Journal of the International Society of Sports Nutrition
Mitzi S Laughlin, Mark E Guilliams, Bruce A Nieschwitz, David Hoellen
INTRODUCTION: Long-duration spaceflight missions lead to the loss of muscle strength and endurance. Significant reduction in muscle function can be hazardous when returning from spaceflight. To document these losses, NASA developed medical requirements that include measures of functional strength and endurance. Results from this Functional Fitness Test (FFT) battery are also used to evaluate the effectiveness of in-flight exercise countermeasures. The purpose of this paper is to document results from the FFT and correlate this information with performance of in-flight exercise on board the International Space Station...
December 2015: Aerospace Medicine and Human Performance
Jay R Hydren, Bruce S Cohen
Recent publications have provided new scientific evidence for a modern aerobic or cardiovascular endurance exercise prescription that optimizes the periodization cycle and maximizes potential endurance performance gains in highly trained individuals. The traditional threshold, high volume, and high-intensity training models have displayed limited improvement in actual race pace in (highly) trained individuals while frequently resulting in overreaching or overtraining (physical injury and psychological burnout)...
December 2015: Journal of Strength and Conditioning Research
Renato Sobral Monteiro-Junior, Cíntia Pereira de Souza, Eduardo Lattari, Nuno Barbosa Ferreira Rocha, Gioia Mura, Sérgio Machado, Elirez Bezerra da Silva
Chronic Low Back Pain (CLBP) is a public health problem and older women have higher incidence of this symptom, which affect body balance, functional capacity and behavior. The purpose of this study was to verifying the effect of exercises with Nintendo Wii on CLBP, functional capacity and mood of elderly. Thirty older women (68 ± 4 years; 68 ± 12 kg; 154 ± 5 cm) with CLBP participated in this study. Elderly individuals were divided into a Control Exercise Group (n = 14) and an Experimental Wii Group (n = 16)...
2015: CNS & Neurological Disorders Drug Targets
Andrea Petróczi, Jorge A Vela Ocampo, Iltaf Shah, Carl Jenkinson, Rachael New, Ricky A James, Glenn Taylor, Declan P Naughton
BACKGROUND: 2,4-Dinitrophenol (DNP) poses serious health-risks to humans. The aims of this three-stage multidisciplinary project were, for the first time, to assess the risks to the general public from fraudulent sale of or adulteration/contamination with DNP; and to investigate motives, reasons and risk-management among DNP-user bodybuilders and avid exercisers. METHODS: Using multiple search-engines and guidance for Internet research, online retailers and bodybuilding forums/blogs were systematically explored for availability of DNP, advice offered on DNP use and user profiles...
2015: Substance Abuse Treatment, Prevention, and Policy
Estevão Scudese, Roberto Simão, Gilmar Senna, Jakob L Vingren, Jeffrey M Willardson, Matheus Baffi, Humberto Miranda
The purpose of this study was to examine the influence of rest period duration (1 vs. 3 minute between sets) on acute hormone responses to a high-intensity and equal volume bench press workout. Ten resistance-trained men (25.2 ± 5.6 years; 78.2 ± 5.7 kg; 176.7 ± 5.4 cm; bench press relative strength: 1.3 ± 0.1 kg per kilogram of body mass) performed 2 bench press workouts separated by 1 week. Each workout consisted of 5 sets of 3 repetitions performed at 85% of 1 repetition maximum, with either 1- or 3-minute rest between sets...
May 2016: Journal of Strength and Conditioning Research
Monica McHenry, Joseph Evans
OBJECTIVES: This study was designed to determine the impact of aerobic exercise on vocal warm-up. STUDY DESIGN: This is a cohort experimental study. METHODS: Sixteen graduate and six undergraduate students in an academic vocal performance program participated. They completed a 30-minute treadmill workout in their target aerobic heart range. Aerodynamic data during singing were acquired before and after the treadmill workout. In full voice, participants sang the first seven notes of the Star Spangled Banner on "pah," repeating the seventh note seven times, at 1...
September 14, 2015: Journal of Voice: Official Journal of the Voice Foundation
Adam Přibylka, Martin Švidrnoch, Juraj Ševčík, Vítězslav Maier
The CE method employing an indirect UV detection for the enantioseparation of 1,3-dimethylamylamine (DMAA), widely used in various preworkout and dietary supplements labeled as a constituent of geranium extract has been developed. The dual-selector system consisting of negatively charged sulfated α-CD (1.1% w/v) and sulfated β-CD (0.2% w/v) in 5 mM phosphate/Tris buffer (pH 3.0) containing the addition of 10 mM benzyltriethylammonium chloride (BTEAC) as the chromophoric additive was used for the enantiomeric separation of DMAA stereoisomers with the LODs in the range of 7...
December 2015: Electrophoresis
Tanja Savukoski, Laura Mehtälä, Bertil Lindahl, Per Venge, Kim Pettersson
BACKGROUND: Whereas elevated cardiac troponin (cTn) concentrations i.e. above the 99th percentile of healthy reference population (recommended cutoff for the diagnosis of myocardial infarction) are well-documented in healthy individuals after prolonged and/or intensive exercises such as marathons, data on less-strenuous sports are scarce. Therefore, our aim was to investigate cTnI and cTnT release in response to recreational resistance training, here a single-bout of 1-h kettlebell workout...
August 2015: Clinical Biochemistry
Jordan M Joy, Ryan P Lowery, Paul H Falcone, Roxanne M Vogel, Matt M Mosman, Chih-Yin Tai, Laura R Carson, Dylan Kimber, David Choate, Michael P Kim, Jacob M Wilson, Jordan R Moon
BACKGROUND: Pre-workout supplements (PWS) have become increasingly popular with recreational and competitive athletes. While many ingredients used in PWS have had their safety assessed, the interactions when combined are less understood. OBJECTIVE: The purpose of this study was to examine the safety of 1 and 2 servings of a PWS. DESIGN: Forty-four males and females (24.4±4.6 years; 174.7±9.3 cm; 78.9±18.6 kg) from two laboratories participated in this study...
2015: Food & Nutrition Research
Ellen Marie Bardal, Karin Roeleveld, Paul Jarle Mork
OBJECTIVE: To investigate whether moderate intensity endurance exercise has similar effects on cardiovascular fitness and autonomic function in patients with fibromyalgia and healthy controls. DESIGN: Case-control intervention study. SUBJECTS: Twenty-five female patients with fibromyalgia and 25 age- and sex-matched healthy controls (age range 40-64 years) were recruited to the study. Fifteen patients and 19 controls participated at both pre- and post-test...
August 18, 2015: Journal of Rehabilitation Medicine
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