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Daniel J Southwell, Shane A Petersen, Tyson A C Beach, Ryan B Graham
Altering footwear worn during performance of the barbell back squat has been shown to change motion patterns, but it is not completely understood how this affects biomechanical loading demands. The primary objective was to compare lower back and extremity net joint moments in 24 experienced weightlifters (12M, 12F) who performed 80% one-repetition maximum back squats under three different footwear conditions (barefoot, running shoes, weightlifting shoes). Results showed that there was a significant main effect of footwear condition on the knee extension moment (p=0...
October 12, 2016: Journal of Electromyography and Kinesiology
Achraf Ammar, Mouna Turki, Hamdi Chtourou, Omar Hammouda, Khaled Trabelsi, Choumous Kallel, Osama Abdelkarim, Anita Hoekelmann, Mohamed Bouaziz, Fatma Ayadi, Tarak Driss, Nizar Souissi
PURPOSE: The aim of this study was to investigate the effect of natural Pomegranate juice supplementation on performance and acute and delayed responses of muscle soreness and biomarkers of muscle damage after a weightlifting training session. METHODS: Nine elite weightlifters (21±0.5 years) performed two Olympic-Weightlifting-sessions after either placebo (PLA) or natural pomegranate juice (POMj) supplementations. Heart rate, blood pressure and blood samples (hematological parameters, muscle damage and C-reactive protein (CRP)) were collected at rest, 3min and 48h after each session...
2016: PloS One
Kyle T Aune, Joseph M Powers
BACKGROUND: Extreme conditioning programs (ECPs) are fitness training regimens relying on aerobic, plyometric, and resistance training exercises, often with high levels of intensity for a short duration of time. These programs have grown rapidly in popularity in recent years, but science describing the safety profile of these programs is lacking. HYPOTHESIS: The rate of injury in the extreme conditioning program is greater than the injury rate of weightlifting and the majority of injuries occur to the shoulder and back...
October 19, 2016: Sports Health
Balraj Singh, Jennifer M Treece, Ghulam Murtaza, Samit Bhatheja, Steven J Lavine, Timir K Paul
A young otherwise healthy 27-year-old male who has been using anabolic steroids for a long time developed Type I aortic dissection associated with heavy weightlifting. The patient did not have a recent history of trauma to the chest, no history of hypertension, and no illicit drug use. He presented with severe chest pain radiating to back and syncopal event with exertion. Initial vitals were significant for blood pressure of 80/50 mmHg, pulse of 80 beats per minute, respirations of 24 per minute, and oxygen saturation of 92% on room air...
2016: Case Reports in Cardiology
Jaroslaw Krzywanski, Tomasz Mikulski, Hubert Krysztofiak, Marcel Mlynczak, Ewa Gaczynska, Andrzej Ziemba
Vitamin D does not only influence the musculoskeletal health and mineral homeostasis but it also affects cardiovascular, endocrine, nervous, immune and mental functions, thus it is of considerable importance for both physically active people and elite athletes. However, vitamin D deficiency is common worldwide and results from inadequate endogenous skin synthesis (insufficient ultraviolet B exposure) and diet. To improve the vitamin D status elite athletes often travel to lower latitude during winter. The aim of the study was to evaluate the seasonal vitamin D status in Polish elite athletes according to the sun exposure and oral supplementation...
2016: PloS One
Ulrika Aasa, Ivar Svartholm, Fredrik Andersson, Lars Berglund
BACKGROUND: Olympic weightlifting and powerlifting are two sports that expose the body to great forces. Injury characteristics have not been systematically reviewed for these two growing sports. OBJECTIVE: The purpose of this study was to systematically review the literature regarding various definitions of injuries used, injury localisation, the prevalence and incidence of injuries and the associated risk factors for injuries in weightlifting and powerlifting. DESIGN: Systematic review...
October 4, 2016: British Journal of Sports Medicine
Amira Zouita Ben Moussa
OBJECTIVE: Sport specific consideration, different demands of various sports and specific training reveal differences of trunk strength capacity. The purpose of this study was to identify strength firstly characteristics of isokinetic parameters of trunk of athletes and secondary to detect the difference and the effect of sports. MATERIAL/PATIENTS AND METHODS: Sixteen athletes of national team athletes were recruited for the study: weightlifting and wrestlers to participate in this study...
September 2016: Annals of Physical and Rehabilitation Medicine
Timothy J Suchomel, Jason P Lake, Paul Comfort
The purpose of this study was to compare the load absorption force-time characteristics of weightlifting catching and pulling derivatives. Twelve resistance-trained men performed repetitions of the hang power clean (HPC), jump shrug (JS), and hang high pull (HHP) on a force platform with 30, 45, 65, and 80% of their one repetition maximum (1RM) HPC. Load absorption phase duration, mean force, and work were calculated from the force-time data. The HHP produced a significantly longer load absorption phase duration compared to the HPC (p < 0...
September 21, 2016: Journal of Strength and Conditioning Research
Kristof Kipp, Chad Harris
Lifting greater loads during weightlifting exercises may theoretically be achieved through increasing the magnitudes of net joint impulses or manipulating the joints' effective mechanical advantage (EMA). The purpose of this study was to investigate muscle-specific EMA and joint impulse as well as impulse-momentum characteristics of the lifter-barbell system across a range of external loads during the execution of the clean. Collegiate-level weightlifters performed sub-maximal cleans at 65, 75, and 85% of their 1-repetition maximum (1-RM) while data from a motion analysis system and a force plate were used to calculate lifter-barbell system impulse and velocity, as well as net extensor impulse generated at the hip, knee, and ankle joints and the EMA of the gluteus maximus, hamstrings, quadriceps, and triceps surae muscles...
September 21, 2016: Journal of Strength and Conditioning Research
Adam Michael Szlezak, Lotti Tajouri, Siri Lauluten Szlezak, James Keane, Clare Minahan
BACKGROUND: The present study examined the effect of a micro-dose of resistance-exercise on serum DHEA-S, IL-6 and mood-state determinants. Potential relationships between mood and the biomarkers were also studied with the aim of directing research on non-invasive exercise-monitoring methods. METHODS: 30 male participants (20 weightlifting-trained; 10 untrained) were separated into 3 groups of 10: weightlifting experimental (WLEXP); untrained experimental (UTEXP); weightlifting placebo (WLPLA)...
2016: SpringerPlus
Dustin C Nabhan, William J Moreau, Shannen C McNamara, Karen K Briggs, Marc J Philippon
Anterior hip pain can be difficult to diagnose due to the many pathologies and overlapping pain patterns that exist in the hip region. Clinical findings of pain at the anterior inferior iliac spine with passive hip flexion, proximal quadriceps pain and weakness, and painful impingement tests of the hip may be indicative of subspine hip impingement. This report describes the diagnosis and treatment of anterior hip pain, including subspine impingement and femoroacetabular impingement in an elite weightlifter...
September 2016: Current Sports Medicine Reports
Astrid Bjørnebekk, Kristine B Walhovd, Marie L Jørstad, Paulina Due-Tønnessen, Ingunn R Hullstein, Anders M Fjell
BACKGROUND: Prolonged high-dose anabolic-androgenic steroid (AAS) use has been associated with psychiatric symptoms and cognitive deficits, yet we have almost no knowledge of the long-term consequences of AAS use on the brain. The purpose of this study is to investigate the association between long-term AAS exposure and brain morphometry, including subcortical neuroanatomical volumes and regional cortical thickness. METHODS: Male AAS users and weightlifters with no experience with AASs or any other equivalent doping substances underwent structural magnetic resonance imaging scans of the brain...
June 30, 2016: Biological Psychiatry
Blair T Crewther, Zbigniew Obminski, Christian J Cook
PURPOSE: To examine the steroid hormone effect on the physical performance of young athletes during an Olympic weightlifting competition. METHODS: 26 boys and 26 girls were monitored across 2 weightlifting competitions. Pre- and post-competition testosterone (T), cortisol (C) and dehydroepiandrosterone-sulphate (DHEA-s) were measured in blood, with pre-event free T (FT) and the free androgen index (FAI) calculated. Body mass (BM) and weightlifting performance were recorded...
September 6, 2016: Pediatric Exercise Science
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
V Gineviciene, A Jakaitiene, M O Aksenov, A V Aksenova, A M Druzhevskaya, I V Astratenkova, E S Egorova, L J Gabdrakhmanova, L Tubelis, V Kucinskas, A Utkus
The performance of professional strength and power athletes is influenced, at least partly, by genetic components. The main aim of this study was to investigate individually and in combination the association of ACE (I/D), ACTN3 (R577X) and PPARGC1A (Gly482Ser) gene polymorphisms with strength/power-oriented athletes' status in two cohorts of European athletes. A cohort of European Caucasians from Russia and Lithuania (161 athletes: by groups - weightlifters (87), powerlifters (60), throwers (14); by elite status - 'elite' (104), 'sub-elite' (57); and 1,202 controls) were genotyped for ACE, ACTN3 and PPARGC1A polymorphisms...
September 2016: Biology of Sport
Lucia C DeLisa, Craig P Hensley, Steven Jackson
BACKGROUND AND PURPOSE: Paget-Schroetter syndrome (PSS) is a rare condition of vein thrombosis that can be manifested in athletes and laborers who overuse their upper extremities. If diagnosed early, PSS can be managed and the symptoms can be fully reversed. Venous duplex ultrasound (US), the modality most commonly used to diagnose deep vein thrombosis (DVT), has high sensitivity and specificity for detecting DVT. This case report describes the differential diagnosis and management of PSS in a weight lifter...
September 1, 2016: Physical Therapy
Torstein E Dæhlin, Tron Krosshaug, Loren Z F Chiu
Weightlifting technique can be objectively assessed from two-dimensional video recordings. Despite its importance, participants' bar trajectories in research involving the snatch or clean exercises are often not reported, potentially due to the time required to digitize video. The purpose of this investigation was to evaluate the use of an LED-based marker, digital video and open source software to automatically track the bar end during weightlifting exercises. A former national-level weightlifter was recorded with a digital video camera performing the snatch, clean and jerk, and squat exercises...
August 19, 2016: Journal of Strength and Conditioning Research
Jan Schimpchen, Maximilian Wagner, Alexander Ferrauti, Michael Kellmann, Mark Pfeiffer, Tim Meyer
We investigated whether cold water immersion following intensive training sessions can enhance recovery in elite Olympic weightlifters, taking into account each athlete's individual response pattern. The entire German male Olympic weightlifting national team participated in the study (n=7), ensuring collection of data from elite athletes only. Using a randomized cross-over design, the athletes went through two high intensity training microcycles consisting of five training sessions that were either followed by a cold water immersion or passive recovery...
August 16, 2016: Journal of Strength and Conditioning Research
Raja Serairi Beji, Wided Megdiche Ksouri, Ridha Ben Ali, Oussama Saidi, Riadh Ksouri, Saloua Jameleddine
AIM: to study the quantitative and qualitative aspects of daily spontaneous nutrition as well as anthropometric characteristics and body composition of young Tunisian weightlifters. METHODS: Thirty one boys aged between 14 and 18 years, practicing for two hours a day, six days a week in the four weightlifting clubs in Tunis were invited to attend an evaluation session for a food survey (3 days recall, with consumption frequency over a period of 7 days) and the assessment of anthropometric measurements (Weight, height and skinfolds)...
February 2016: La Tunisie Médicale
Stephen Hunter, Scott T Leatherdale, Kate Storey, Valerie Carson
BACKGROUND: Adolescence is characterized by low moderate- to vigorous- intensity physical activity (MVPA) levels. Targeting the school setting can increase MVPA among a large proportion of adolescents. However, school-based physical activity interventions for adolescents remain largely ineffective. Therefore, the purpose of this study was to examine how naturally-occurring changes to school physical activity policy, recreational programming, public health resources, and the physical environment, impact adolescent MVPA over a 1-year period...
2016: International Journal of Behavioral Nutrition and Physical Activity
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