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squat, squatting

Kingsley O Abode-Iyamah, Stephanus V Viljoen, Colleen L McHenry, Michael A Petrie, Kirsten E Stoner, Nader S Dahdaleh, Nicole M Grosland, Matthew A Howard, Richard K Shields
BACKGROUND: Cervical spondylotic myelopathy (CSM) is a common disease of aging that leads to gait instability resulting from loss of leg sensory and motor functions. The results of surgical intervention have been studied using a variety of methods, but no test has been reported that objectively measures integrative leg motor sensory functions in CSM patients. OBJECTIVE: To determine the feasibility of using a novel single leg squat (SLS) test to measure integrative motor sensory functions in patients with CSM before and after surgery...
November 2016: Neurosurgery
Gerald T Mangine, Jay R Hoffman, Ran Wang, Adam M Gonzalez, Jeremy R Townsend, Adam J Wells, Adam R Jajtner, Kyle S Beyer, Carleigh H Boone, Amelia A Miramonti, Michael B LaMonica, David H Fukuda, Nicholas A Ratamess, Jeffrey R Stout
PURPOSE: To compare the effects of two different resistance training programs, high intensity (INT) and high volume (VOL), on changes in isometric force (FRC), rate of force development (RFD), and barbell velocity during dynamic strength testing. METHODS: Twenty-nine resistance-trained men were randomly assigned to either the INT (n = 15, 3-5 RM, 3-min rest interval) or VOL (n = 14, 10-12 RM, 1-min rest interval) training group for 8 weeks. All participants completed a 2-week preparatory phase prior to randomization...
October 15, 2016: European Journal of Applied Physiology
Marcelo Cardoso de Souza, Fábio Jennings, Hisa Morimoto, Jamil Natour
OBJECTIVE: The purpose was to evaluate the effectiveness of a progressive muscle strengthening program using a Swiss ball for AS patients. METHODS: Sixty patients with AS were randomized into the intervention group (IG) or the control group (CG). Eight exercises were performed by the IG patients with free weights on a Swiss ball two times per week for 16 weeks. The evaluations were performed by a blinded evaluator at baseline and after 4, 8, 12 and 16 weeks using the following instruments: the one-repetition maximum test (1 RM), BASMI, BASFI, HAQ-S, SF-36, 6-minute walk test, Time Up and Go test, BASDAI, ASDAS, ESR and CRP dosage and Likert scale...
September 17, 2016: Revista Brasileira de Reumatologia
Fabrício E Rossi, Brad J Schoenfeld, Skyler Ocetnik, Jonathan Young, Andrew Vigotsky, Bret Contreras, James W Krieger, Michael G Miller, Jason Cholewa
BACKGROUND: The purpose of this study was to compare strength, body composition, and functional outcome measures following performance of the back squat, leg press, or a combination of the two exercises. METHODS: Subjects were pair-matched based on initial strength levels and then randomly assigned to 1 of 3 groups: A squat-only group (SQ) that solely performed squats for the lower body; a leg press-only group (LP) that solely performed leg presses for the lower body, or; a combined squat and leg press group (SQ-LP) that performed both squats and leg presses for the lower body...
October 13, 2016: Journal of Sports Medicine and Physical Fitness
Alejandro Rodríguez-Fernández, Javier Sánchez Sánchez, José A Rodríguez-Marroyo, David Casamichana, José G Villa
BACKGROUND: Numerous studies have analyzed during competitive season different conditioning programs to improve soccer players' repeat sprint ability (RSA). However, few studies have focused on analysing what happens with this ability after small-sided games (SSG)-based training. Thus, the aim of this study was to determine the changes in physical performance after 5-weeks of pre-season training composed of SSGs in amateur soccer players. METHODS: Twenty-four male soccer players performed RSA, a sit-and-reach and two vertical jump (squat and counter movement jump) tests before and after 5-weeks of pre- season training using fundamentally SSGs...
October 13, 2016: Journal of Sports Medicine and Physical Fitness
J O'Brien, W Young, C F Finch
The efficacy of injury prevention exercise programs (IPEPs) for amateur youth soccer has been established, but little is known about their adaptability to other soccer populations. This study aimed to assess the use of individual injury prevention exercises by professional youth soccer teams, against the industry-standard, FIFA 11+ program. Four teams' chosen IPEPs were observed across one season and documented on a standardized form. The use of each FIFA 11+ exercise was coded as "performed", "performed modified" or "not performed"...
October 7, 2016: Scandinavian Journal of Medicine & Science in Sports
Christopher M Lockwood, Michael D Roberts, Vincent J Dalbo, Abbie E Smith-Ryan, Kristina L Kendall, Jordan R Moon, Jeffrey R Stout
OBJECTIVE: The objective of this study was to compare the chronic effects of different whey protein forms on body composition and performance when supplemented with resistance training. METHODS: Resistance-trained men (N = 56, 21.4 ± 0.4 years, 79.5 ± 1.0 kg) participated in an 8-week resistance training regimen (2 upper-body sessions and 2 lower-body sessions per week) and received one of 4 double-blinded treatments: 30 g/serving carbohydrate placebo (PLA) or 30 g/serving protein from either (a) 80% whey protein concentrate (WPC), (b) high-lactoferrin-containing WPC (WPC-L), or (c) extensively hydrolyzed WPC (WPH)...
October 6, 2016: Journal of the American College of Nutrition
I Loturco, F Y Nakamura, R Kobal, S Gil, B Pivetti, L A Pereira, H Roschel
It is unknown whether traditional periodization of strength-power training involving accumulation, transformation and realization blocks is superior to other simpler and more practical training schemes. The purpose of this study was thus to investigate changes in strength/power/speed characteristics of elite soccer players in response to either classic strength-power periodization (TSP) or optimum power load (OPL). 23 professional soccer players were randomly assigned to TSP or OPL for 6 weeks in-season regular training (3 times per week)...
October 5, 2016: International Journal of Sports Medicine
S Manderoos, N Wasenius, M K Laine, U M Kujala, E Mälkiä, J Kaprio, S Sarna, H M Bäckmand, J A Kettunen, O J Heinonen, A M Jula, S Aunola, J G Eriksson
The aim of this cross-sectional study was to compare mobility and muscle strength in male former elite endurance and power athletes aged 66-91 years (n = 150; 50 men in both former elite athlete groups and in their control group). Agility, dynamic balance, walking speed, chair stand, self-rated balance confidence (ABC-scale), jumping height, and handgrip strength were assessed. Former elite power athletes had better agility performance time than the controls (age- and body mass index, BMI-adjusted mean difference -3...
October 5, 2016: Scandinavian Journal of Medicine & Science in Sports
Emilija Stojanović, Vladimir Ristić, Daniel Travis McMaster, Zoran Milanović
BACKGROUND: Plyometric training is an effective method to prevent knee injuries in female athletes; however, the effects of plyometric training on jump performance in female athletes is unclear. OBJECTIVE: The aim of this systematic review and meta-analysis was to determine the effectiveness of plyometric training on vertical jump (VJ) performance of amateur, collegiate and elite female athletes. METHODS: Six electronic databases were searched (PubMed, MEDLINE, ERIC, Google Scholar, SCIndex and ScienceDirect)...
October 4, 2016: Sports Medicine
Bilal Farouk El-Zayat, Thomas J Heyse, Nelson Fanciullacci, Luc Labey, Susanne Fuchs-Winkelmann, Bernardo Innocenti
INTRODUCTION: No evidence-based guidelines are available to determine the appropriate stem length, and whether or not to cement stems in revision total knee arthroplasty (TKA). Therefore, the objective of this study was to compare stresses and relative movement of cemented and uncemented stems of different lengths using a finite element analysis. MATERIALS AND METHODS: A finite element model was created for a synthetic tibia. Two stem lengths (95 and 160 mm) and two types of fixation (cemented or press fit) of a hinged TKA were examined...
October 4, 2016: Archives of Orthopaedic and Trauma Surgery
Anna W Mccallum, Patricia Cabezas, Nikos Andreakis
Six species of Paramunida are reported from the continental margin of north-western Australia. Three species are new to science: Paramunida christinae sp. nov., P. ioannis sp. nov., and P. spiniantennata sp. nov. Two species are reported for the first time from Australian waters, P. evexa Macpherson, 1996 and P. tricarinata (Alcock, 1894). These species were confirmed by molecular evidence from the mitochondrial markers ND1 and 16S. We also examine phylogenetic relationships within the genus, and provide an identification key for all known Paramunida species...
October 4, 2016: Zootaxa
M Kodaira, Y Sekijima, N Ohashi, Y Takahashi, K Ueno, D Miyazaki, S Ikeda
Compression neuropathy of the common peroneal nerve (CPN) at the fibula head is a common condition, but it has not attracted attention in working environments. Here, we report a 38-year-old sewer pipe worker who presented with bilateral CPN palsy following 6h working with a squatting posture in a narrow sewer pipe. During the work, he could not stretch his legs sufficiently because of the confined space. His symptoms deteriorated with repetition of the same work for 1 week. Motor nerve conduction study showed conduction block at the fibula head of bilateral CPNs, compatible with compression neuropathy at this lesion...
September 30, 2016: Occupational Medicine
Paige E Rice, Courtney L Goodman, Christopher R Capps, N Travis Triplett, Travis M Erickson, Jeffrey M McBride
The purpose of this study was to compare force- and power-time curve variables during jumping between Division I strength-matched male and female basketball athletes. Males (n = 8) and females (n = 8) were strength matched by testing a one-repetition maximum (1RM) back squat. 1RM back squat values were normalised to body mass in order to demonstrate that strength differences were a function of body mass alone. Subjects performed three countermovement jumps (CMJ) at maximal effort. Absolute and relative force- and power-time curve variables from the CMJs were analysed between males and females...
October 1, 2016: European Journal of Sport Science
Yoshihisa Tanaka, Shinichiro Nakamura, Shinichi Kuriyama, Hiromu Ito, Moritoshi Furu, Richard D Komistek, Shuichi Matsuda
BACKGROUND: It is unknown whether a computer simulation with simple models can estimate individual in vivo knee kinematics, although some complex models have predicted the knee kinematics. The purposes of this study are first, to validate the accuracy of the computer simulation with our developed model during a squatting activity in a weight-bearing deep knee bend and then, to analyze the contact area and the contact stress of the tri-condylar implants for individual patients. METHODS: We compared the anteroposterior (AP) contact positions of medial and lateral condyles calculated by the computer simulation program with the positions measured from the fluoroscopic analysis for three implanted knees...
September 21, 2016: Clinical Biomechanics
Daniel Camara Azevedo, Edson Barreto Paiva, Alexia Moura Abuhid Lopes, Henrique de Oliveira Santos, Ricardo Luiz Carneiro, André Soares Rodrigues, Marco Antonio Percope de Andrade, Eduardo N Novais, Linda R Van Dillen
Study Design Cross-sectional, case-control design. Background Pelvic movement has been considered a possible discriminating parameter associated with FAI symptom onset. Decreased pelvic rotation has been found during squatting in people with FAI when compared to hip-healthy people. However, it is possible that changes in pelvic movement may occur in other hip conditions because of pain and may not be specific to FAI. Objectives To compare sagittal pelvic rotation during hip flexion and in sitting between people with Femoroacetabular Impingement (FAI) and people with other symptomatic hip conditions...
September 29, 2016: Journal of Orthopaedic and Sports Physical Therapy
Luis Peñailillo, Nicolás Guzmán, José Cangas, Alvaro Reyes, Hermann Zbinden-Foncea
: The aim of this study was to examine the metabolic demand and extent of muscle damage of eccentric cycling targeting knee flexor (FLEX) and knee extensor (EXT) muscles. METHODS: Eight sedentary men (23.3 ± 0.7 y) underwent two eccentric cycling sessions (EXT and FLEX) of 30 min each, at 60% of the maximum power output. Oxygen consumption (VO2), heart rate (HR) and rated perceived exertion (RPE) were measured during cycling. Countermovement and squat jumps (CMJ and SJ), muscle flexibility, muscle soreness and pain pressure threshold (PPT) of knee extensor and flexor muscles were measured before, immediately after and 1-4 days after cycling...
August 15, 2016: European Journal of Sport Science
J M Oliver, S C Jenke, J D Mata, A Kreutzer, M T Jones
This study compared the acute cytokine response, and kinetic and kinematic profile following back squat exercise in resistance-trained men. In a randomized, cross-over design, 10 resistance-trained men (27±4 y, 1.80±0.07 m, 82.8±6.7 kg, 16.3±3.5% fat) performed the back squat exercise using traditional and cluster set configurations. Kinetic and kinematic data were sampled throughout each condition. Venous blood was sampled prior, immediately post, 30 min, 60 min, 24 h, and 48 h post-exercise for plasma interleukin-6 (IL-6) and interleukin-15 (IL-15)...
September 27, 2016: International Journal of Sports Medicine
T Exell, G Irwin, M Gittoes, D Kerwin
The aim of this study was to empirically examine the interaction of athlete-specific kinematic kinetic and strength asymmetry in sprint running. Bilateral ground reaction force and kinematic data were collected during maximal velocity (mean = 9.05 m/s) sprinting for eight athletes. Bilateral ground reaction force data were also collected while the same athletes performed maximal effort squat jumps. Using novel composite asymmetry scores, interactions between kinematic and kinetic asymmetry were compared for the group of sprinters...
September 27, 2016: Scandinavian Journal of Medicine & Science in Sports
V Prakash, Mohan Ganesan, R Vasanthan, K Hariohm
OBJECTIVES: In India, post-stroke outcomes are determined using functional outcome measures (FOMs), the contents of which have not been validated for their relevance to the Indian population. In this study, we aimed to evaluate the cultural validity of five frequently used stroke-specific FOMs by comparing their contents with the problems reported by patients with stroke in India. METHODS: Face-to-face structured interviews were conducted with 152 patients diagnosed with stroke in India...
September 27, 2016: Topics in Stroke Rehabilitation
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