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Peter H Sönksen, Richard I G Holt, Walailuck Böhning, Nishan Guha, David A Cowan, Christiaan Bartlett, Dankmar Böhning
Background: Endocrine profiles have been measured on blood samples obtained immediately post-competition from 693 elite athletes from 15 Olympic Sports competing at National or International level; four were subsequently excluded leaving 689 for the current analysis. Methods: Body composition was measured by bioimpedance in a sub-set of 234 (146 men and 88 women) and from these data a regression model was constructed that enabled 'estimated' lean body mass and fat mass to be calculated on all athletes...
2018: Clinical Diabetes and Endocrinology
Charlene G Echague, John M Csokmay
BACKGROUND: Rhabdomyolysis is characterized by muscle necrosis and release of intracellular constituents, causing muscle pain, weakness, and myoglobinuria. This can be attributed to muscle injury after strenuous exercise. If the abdominal wall is involved, clinical presentation may resemble an acute abdomen. CASE: A 27-year-old woman, gravida 4 para 2, presented with swelling and pain of the mons pubis and abdominal pain after intense powerlifting 2 days prior. A computed tomography scan was performed, revealing abdominal wall inflammation...
March 2018: Obstetrics and Gynecology
Megan A Bryanton, Martin Bilodeau
The purpose of this investigation was to evaluate the effect of the removal of vision and/or surface compliance on postural stability in strength athletes who habitually use free-weights and compound movements in their training (i.e., powerlifters, Olympic weightlifters), and untrained individuals. Static and dynamic balance testing was performed with eyes open or closed on stable and memory foam surfaces. Both groups had similar increases in postural sway area and velocity during quiet standing testing; whereas group main effects and interactions for dynamic testing revealed that untrained participants experienced greater relative declines in postural performance when voluntary limits of stability are stressed, especially when both vision and surface compliance were deterred...
January 29, 2018: Journal of Motor Behavior
Artur Gołaś, Anna Zwierzchowska, Adam Maszczyk, Michał Wilk, Petr Stastny, Adam Zając
The disabled population varies significantly in regard to physical fitness, what is conditioned by the damage to the locomotor system. Recently there has been an increased emphasis on the role of competitive sport in enhancing health and the quality of life of individuals with disability. One of the sport disciplines of Paralympics is the flat bench press. The bench press is one of the most popular resistance exercises used for the upper body in healthy individuals. It is used not only by powerlifters, but also by athletes in most strength-speed oriented sport disciplines...
December 2017: Journal of Human Kinetics
Ryan J Colquhoun, Christopher M Gai, Danielle Aguilar, Daniel Bove, Jeffrey Dolan, Andres Vargas, Kaylee Couvillion, Nathaniel D M Jenkins, Bill I Campbell
PURPOSE: To compare the effects of a high- versus a moderate-training frequency on maximal strength and body composition. METHODS: 28 young, healthy resistance-trained males were randomly assigned to either: 3x/week (3x; n=16) or 6x/week (6x; n=12). Dependent variables (DVs) assessed at baseline and after the 6-week training intervention included: squat 1RM (SQ1RM), bench press 1RM (BP1RM), deadlift 1RM (DL1RM), powerlifting total (PLT), Wilk's coefficient (WC), fat-free mass (FFM) and fat mass (FM)...
January 5, 2018: Journal of Strength and Conditioning Research
Jamie J Ghigiarelli, Luke M Pelton, Adam M Gonzalez, Andras M Fulop, Joshua Y Gee, Katie M Sell
Powerlifters train with specialty bars for unstable load (UL) training. For the bench press, the acute effects of UL are mixed, with few studies that examine training interventions. The purpose of this study was to examine the effects of a 6-week bench press training program that uses the Freak Bar (FB) as compared to a traditional barbell (TB) on maximum bench press, peak force, and peak impulse. Seven males and 3 females (21 ± 2.0 yr, 172.2 ± 2.9 cm, and 95.3 ± 20.3 kg) were required to bench press 2 days per week as part of a structured program...
January 12, 2018: Journal of Strength and Conditioning Research
Eric R Helms, Scott R Brown, Matt R Cross, Adam Storey, John Cronin, Michael C Zourdos
This study assessed male (n = 9) and female (n = 3) powerlifters' (18-49 years) ability to select loads using the repetitions in reserve-based rating of perceived exertion (RPE) scale for a single set for squat, bench press, and deadlift. Subjects trained 3× per week. For 3 weeks on nonconsecutive days in the weekly order of hypertrophy (8 repetitions at 8 RPE), power (2 repetitions at 8 RPE), and strength (3 repetitions at 9 RPE), using subject-selected loads intended to match the target RPE. Bench press and squat were performed every session and deadlift during strength and power only...
October 2017: Journal of Strength and Conditioning Research
Carlos Balsalobre-Fernández, David Marchante, Eneko Baz-Valle, Iván Alonso-Molero, Sergio L Jiménez, Mario Muñóz-López
The purpose of this study was to analyze the validity, reliability, and accuracy of new wearable and smartphone-based technology for the measurement of barbell velocity in resistance training exercises. To do this, 10 highly trained powerlifters (age = 26.1 ± 3.9 years) performed 11 repetitions with loads ranging 50-100% of the 1-Repetition maximum in the bench-press, full-squat, and hip-thrust exercises while barbell velocity was simultaneously measured using a linear transducer (LT), two Beast wearable devices (one placed on the subjects' wrist -BW-, and the other one directly attached to the barbell -BB-) and the iOS PowerLift app...
2017: Frontiers in Physiology
Robert Ball, Drew Weidman
In this paper we report on 47,913 officially judged contestant results from powerlifting matches from January 1, 2012 - June 11, 2016 for the USA Powerlifting Federation.We found that age and sex to be the most complex factors in predicting powerlifting results. For women, in general, the younger the woman is, the more they can squat; the older the woman is the less they can squat. For men and women, with the one exception for women's squat, the peak age of lifting power is between the ages of 24-49, at which point lifting power slowly declines...
July 3, 2017: Journal of Strength and Conditioning Research
Randall F D'Souza, Thomas Bjørnsen, Nina Zeng, Kirsten M M Aasen, Truls Raastad, David Cameron-Smith, Cameron J Mitchell
Powerlifters are the epitome of muscular adaptation and are able to generate extreme forces. The molecular mechanisms underpinning the significant capacity for force generation and hypertrophy are not fully elucidated. MicroRNAs (miRs) are short non-coding RNA sequences that control gene expression via promotion of transcript breakdown and/or translational inhibition. Differences in basal miR expression may partially account for phenotypic differences in muscle mass and function between powerlifters and untrained age-matched controls...
2017: Frontiers in Physiology
Katarzyna Gwizdek, Anna Brzęk, Monika Bąk-Sosnowska, Anna Dittfeld, Andrzej Knapik, Damian Ziaja
BACKGROUND: Anabolic-androgenic steroids (AAS) are said to be frequently used by both professional and amateur athletes. In addition to having a negative impact on health, steroids defy the concept of fair play. DESIGN: observational study. SETTING: other - Gyms. AIM: The aim of the study was to evaluate the scale of the problem related to using anabolic- androgenic steroids (AAS) by gym athletes and to analyze possible causes...
June 8, 2017: Journal of Sports Medicine and Physical Fitness
Martin A O'Reilly, Darragh F Whelan, Tomas E Ward, Eamonn Delahunt, Brian M Caulfield
The deadlift is a compound full-body exercise that is fundamental in resistance training, rehabilitation programs and powerlifting competitions. Accurate quantification of deadlift biomechanics is important to reduce the risk of injury and ensure training and rehabilitation goals are achieved. This study sought to develop and evaluate deadlift exercise technique classification systems utilising Inertial Measurement Units (IMUs), recording at 51.2Hz, worn on the lumbar spine, both thighs and both shanks. It also sought to compare classification quality when these IMUs are worn in combination and in isolation...
June 14, 2017: Journal of Biomechanics
Patroklos Androulakis-Korakakis, Louis Langdown, Adam Lewis, James Fisher, Paulo Gentil, Antonio Paoli, James Steele
Powerlifters and strongman athletes have a necessity for optimal levels of muscular strength whilst maintaining sufficient aerobic capacity to perform and recover between events. HIIT has been popularized for its efficacy in improving both aerobic fitness and strength but never assessed within the aforementioned population group. The present study looked to compare the effect of exercise modality, e.g. a traditional aerobic mode (AM), and strength mode, (SM), during HIIT upon aerobic fitness and strength. Sixteen well resistance trained male participants, currently competing in powerlifting and strongman events, completed 8 weeks of approximately effort- and volume-matched HIIT in 2 groups: AM (cycling, n=8) and SM (resistance training, n=8)...
April 21, 2017: Journal of Strength and Conditioning Research
Alicia M Montalvo, Hilary Shaefer, Belinda Rodriguez, Tan Li, Katrina Epnere, Gregory D Myer
The objective of the study is to examine injury epidemiology and risk factors for injury in CrossFit athletes. A survey was administered to athletes at four owner-operated facilities in South Florida. Respondents reported number, location of injury, and training exposure from the preceding six months and answered questions regarding potential risk factors for injury. Fifty out of 191 athletes sustained 62 injuries during CrossFit participation in the preceding six months. The most frequently injured locations were the shoulder, knee, and lower back...
March 2017: Journal of Sports Science & Medicine
(no author information available yet)
No abstract text is available yet for this article.
April 2017: Journal of Strength and Conditioning Research
Daniel J Glassbrook, Scott R Brown, Eric R Helms, J Scott Duncan, Adam G Storey
No prior study has compared the joint angle and ground reaction force (Fv) differences between the high-bar back-squat (HBBS) and low-bar back-squat (LBBS) above 90% 1RM. Six male powerlifters (height: 179.2 ± 7.8 cm; bodyweight: 87.1 ± 8.0 kg; age: 27.3 ± 4.2 years) of international level, six male Olympic weightlifters (height: 176.7 ± 7.7 cm; bodyweight: 83.1 ± 13 kg; age: 25.3 ± 3.1 years) of national level, and six recreationally trained male athletes (height: 181.9 ± 8.7 cm; bodyweight: 87.9 ± 15...
February 8, 2017: Journal of Strength and Conditioning Research
Ryan J Colquhoun, Christopher M Gai, Jeoffrey Walters, Andrew R Brannon, Marcus W Kilpatrick, Dominic P DʼAgostino, Bill I Campbell
Colquhoun, RJ, Gai, CM, Walters, J, Brannon, AR, Kilpatrick, MW, D'Agostino, DP, and Campbell, WI. Comparison of powerlifting performance in trained men using traditional and flexible daily undulating periodization. J Strength Cond Res 31(2): 283-291, 2017-Daily undulating periodization (DUP) is a growing trend, both in practice and in the scientific literature. A new form of DUP, flexible daily undulating periodization (FDUP), allows for athletes to have some autonomy by choosing the order of their training...
February 2017: Journal of Strength and Conditioning Research
Carlos Balsalobre-Fernández, David Marchante, Mario Muñoz-López, Sergio L Jiménez
The purpose of this study was to analyse the validity and reliability of a novel iPhone app (named: PowerLift) for the measurement of mean velocity on the bench-press exercise. Additionally, the accuracy of the estimation of the 1-Repetition maximum (1RM) using the load-velocity relationship was tested. To do this, 10 powerlifters (Mean (SD): age = 26.5 ± 6.5 years; bench press 1RM · kg(-1) = 1.34 ± 0.25) completed an incremental test on the bench-press exercise with 5 different loads (75-100% 1RM), while the mean velocity of the barbell was registered using a linear transducer (LT) and Powerlift...
January 18, 2017: Journal of Sports Sciences
Paul T Cutrufello, Stephen J Gadomski, Nicholas A Ratamess
Cutrufello, PT, Gadomski, SJ, and Ratamess, NA. An evaluation of agonist:antagonist strength ratios and posture among powerlifters. J Strength Cond Res 31(2): 298-304, 2017-Powerlifters routinely focus on 3 exercises: bench press, squat, and deadlift. This focus may predispose them to the development of muscle imbalances in either the upper or lower extremity which might also influence posture. Therefore, the purpose of the present study was to examine the agonist:antagonist strength ratios and their relationship to postural measures among powerlifters...
February 2017: Journal of Strength and Conditioning Research
Jozo Grgic, Pavle Mikulic
Grgic, J and Mikulic, P. Tapering practices of Croatian open-class powerlifting champions. J Strength Cond Res 31(9): 2371-2378, 2017-The aim of this study was to explore tapering practices among 10 Croatian open-class powerlifting champions (mean ± SD: age 29.2 ± 3.2 years; Wilks coefficient 355.1 ± 54.8). The athletes were interviewed about their tapering practices using a semi-structured interview after which the audio content was transcribed. The athletes reported decreasing training volume during the taper by 50...
September 2017: Journal of Strength and Conditioning Research
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