bluuebunny/crossref_metadata_2025_split huggingface dataset:
Complex Training: The Effect of Exercise Selection and Training Status on Postactivation Potentiation in Rugby League Players
Authors: Scott David J. , Ditroilo Massimiliano , Marshall Phil A. 
Published: November 2016

Abstract
Scott, DJ, Ditroilo, M, and Marshall, PA. Complex training: the effect of exercise selection and training status on postactivation potentiation in rugby league players. J Strength Cond Res 31(10): 2694–2703, 2017—This study compared the postactivation potentiation (PAP) response of the hex bar deadlift (HBD) and back squat (BS) exercises. The PAP response between different levels of athletes was also compared. Ten professional and 10 amateur rugby league players performed 2 experimental sessions. Participants performed a countermovement jump (CMJ) before and 2, 4, 6, 8, 10, 12, 14, and 16 minutes after a conditioning activity (CA) that contained 1 set of 3 repetitions at 93% 1 repetition maximum of either HBD or BS. A force platform determined peak power output (PPO), force at PPO, velocity at PPO, and jump height of each CMJ. Surface electromyography (EMG) of the vastus lasteralis, rectus femoris, tibialis anterior, and gastrocnemius medialis of each participant's dominant leg was recorded during each CMJ. A further 10 participants performed a control trial without a CA. The HBD expressed PAP between 2 and 6 minutes post-CA, whereas the BS did not. The HBD exhibited a significantly (p ≤ 0.05) greater PAP response than the BS for PPO. There were no significant (p > 0.05) differences between stronger and weaker players. There were no significant (p > 0.05) changes in the EMG variables. These results suggest that HBD is a suitable CA for eliciting PAP in stronger and weaker athletes. Strength and conditioning coaches should consider the CA and time frame between the CA and the plyometric exercise for optimal PAP responses.
An Evaluation of Agonist: Antagonist Strength Ratios and Posture Among Powerlifters
Authors: Cutrufello Paul T. , Gadomski Stephen J. , Ratamess Nicholas A. 
Published: November 2016

Abstract
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. An ex post facto study design compared 15 male powerlifters (35.3 ± 13.7 years old) and 15 age-matched controls (34.9 ± 14.6 years old). Maximal isometric strength tests were conducted using handheld dynamometry. Posture was evaluated using pectoralis minor length, pelvic tilt, thoracic kyphosis, and lumbar lordosis. Strength imbalances were observed for shoulder horizontal adduction:abduction (2.57 ± 0.58 vs. 1.78 ± 0.28; p < 0.001) and knee flexion:extension (0.61 ± 0.15 vs. 0.50 ± 0.10; p = 0.033). Pectoralis minor length was significantly shorter among the powerlifters (6.1 ± 1.9 vs. 4.2 ± 1.4; p = 0.005); however, there was no statistical difference in thoracic kyphosis (37.7 ± 9.4 vs. 39.1 ± 10.9; p = 0.722), pelvic tilt (10.6 ± 3.6 vs. 11.3 ± 3.7; p = 0.622), or lumbar lordosis (25.0 ± 7.6 vs. 23.0 ± 8.4; p = 0.500) angles. Strength imbalances, including shoulder horizontal adduction:abduction and knee flexion:extension, and a shortened pectoralis minor may evolve as training adaptations among powerlifters, whereas thoracic kyphosis, pelvic tilt, and lumbar lordosis remain unchanged.
The Effect of Exercise-Induced Muscle Damage After a Bout of Accentuated Eccentric Load Drop Jumps and the Repeated Bout Effect
Authors: Bridgeman Lee A. , Gill Nicholas D. , Dulson Deborah K. , McGuigan Michael R. 
Published: November 2016

Abstract
Bridgeman, LA, Gill, ND, Dulson, DK, and McGuigan, MR. The effect of exercise induced muscle damage after a bout of accentuated eccentric load drop jumps and the repeated bout effect. J Strength Cond Res 31(2): 386–394, 2017—Although previous studies have investigated exercise-induced muscle damage (EIMD) after a bout of unloaded drop jumps (DJs), none have investigated the effects of accentuated eccentric load (AEL) DJs on EIMD. The purpose of this study was to investigate the effects of 30 and 50 AEL DJs on strength, jump performance, muscle soreness, and blood markers. Eight resistance trained athletes participated in this study. In week 1, baseline countermovement jump (CMJ), squat jump (SJ), concentric and eccentric peak force (PF), creatine kinase, and muscle soreness were assessed. Subjects then completed 30 AEL DJs and baseline measures were retested immediately postintervention, 1, 24, and 48 hours later. Two weeks later, the subjects completed the same protocol with an increase in AEL DJ volume (50). Subjects' SJ height was reduced in week 1 compared with week 3, postintervention, 1, 24, and 48 hours later (ES = −0.34, −0.44, −0.38, and −0.40). Subjects' CMJ height was reduced in week 1 compared with week 3, postintervention, 1, and 24 hours later (ES = −0.37, −0.29, and −0.39). Concentric PF was reduced in week 1 compared with week 3, postintervention and 24 and 48 hours later (ES = −0.02, −0.23, and −0.32). Eccentric PF was reduced in week 1 compared with week 3, postintervention, 24, and 48 hours later (ES = −0.24, −0.16, and −0.50). In this sample, 30 AEL DJs attenuated the effects of EIMD following which 50 AEL DJs completed 2 weeks later.
Game Times and Higher Winning Percentages of West Coast Teams of the National Football League Correspond With Reduced Prevalence of Regular Season Injury
Authors: Brager Allison J. , Mistovich Ronald J. 
Published: November 2016

Abstract
Brager, AJ and Mistovich, RJ. Game times and higher winning percentages of west coast teams of the National Football League correspond with reduced prevalence of regular season injury. J Strength Cond Res 31(2): 462–467, 2017—West coast teams of the National Football League are more statistically likely to win home night games against east coast opponents. The alignment of game times with daily rhythms of alertness is thought to contribute to this advantage. This study aims to determine whether rates of turnovers and injuries during the regular season, putative measures of mental and physical fatigue, impact winning percentages. Regular season schedules and rates of turnovers for each of the 32 teams were obtained from Pro-Football-Reference. We developed our own metric of injury risk for each position obtained from depth charts and regular season schedules. This metric compared cumulative weeks on injury reserve with cumulative time zone travel. West coast teams traveled 4 times as often as east coast teams. However, teams traveling eastward won twice as many games. There was no relationship between the extent and direction of travel and number of turnovers. Losing teams had more turnovers. The offensive and defensive lines in Central Time (CT) were placed on injury reserve 4 times as often as offensive and defensive lines in Pacific Time (PT). Injury prevalence in CT vs. PT was most prominent midseason. Plotting midseason game time relative to biological time revealed that PT teams play games closer to endogenous peaks in alertness, whereas CT teams play games closer to endogenous troughs in alertness. Overall, closer alignment of game time with the endogenous “alerting” signal may protect west coast teams from fatigue-related injuries and suggests for modified strength and conditioning programs.
Loads and Movement Speeds Dictate Differences in Power Output During Circuit Training
Authors: Roberson Kirk B. , Chowdhari Sean S. , White Morgan J. , Signorile Joseph F. 
Published: November 2016

Abstract
Roberson, KB, Chowdhari, SS, White, MJ, and Signorile, JF. Loads and movement speeds dictate differences in power output during circuit training. J Strength Cond Res 31(10): 2765–2776, 2017—Power training has become a common exercise intervention for improving muscle strength, power, and physical function while reducing injury risk. Few studies, however, have evaluated acute load changes on power output during traditional resistance training protocols. Therefore, the aim of this study was to quantify the effects of different loading patterns on power output during a single session of circuit resistance training (CRT). Nine male (age = 19.4 ± 0.9 years) and 11 female participants (age = 20.6 ± 1.6 years) completed 3 CRT protocols during separate testing sessions using 7 pneumatic exercises. Protocols included heavy load explosive contraction (HLEC: 80% one repetition maximum [1RM], maximum speed concentric-2 seconds eccentric), heavy load controlled contraction (HLCC: 80% 1RM, 2 seconds concentric-2 seconds eccentric), and moderate load explosive contraction (MLEC: 50% 1RM, maximum speed concentric-2 seconds eccentric). Protocols were assigned randomly using a counterbalanced design. Power for each repetition and set were determined using computerized software interfaced with each machine. Blood lactate was measured at rest and immediately postexercise. For male and female participants, average power was significantly greater during all exercises for HLEC and MLEC than HLCC. Average power was greatest during the HLEC for leg press (LP), hip adduction (ADD), and hip abduction (ABD) (p ≤ 0.05), whereas male participants alone produced their greatest power during HLEC for leg curl (LC) (p < 0.001). For male and female participants, significantly greater power was detected by set for LP, lat pull-down (LAT), ADD, LC, and ABD for the MLEC protocol (p < 0.02) and for LP, LAT, CP, and LC for the HLEC protocol (p < 0.03). A condition × sex interaction was seen for blood lactate changes (

JOURNAL/jscr/04.03/00124278-201710000-00015/15MMU1/v/2023-08-19T002734Z/r/image-tiff

= 0.249; p = 0.024), with female participants producing a significantly greater change for MLEC than HLEC (Mdiff = 1.61 ± 0.35 mmol·L−1; p = 0.011), whereas male participants showed no significant differences among conditions. Performing a CRT protocol using explosive training patterns, especially at high loads for lower-body exercises and moderate loads for upper-body exercises, produces significantly higher power than controlled speed training in most exercises. These results provide exercisers, personal trainers, and strength coaches with information that can assist in the design of training protocols to maximize power output during CRT.
Selection Limits to Adaptive Walks on Correlated Landscapes
Authors: Heredia Jorge Pérez , Trubenová Barbora , Sudholt Dirk , Paixão Tiago 
Published: November 2016

Abstract
Adaptation depends critically on the effects of new mutations and their dependency on the genetic background in which they occur. These two factors can be summarized by the fitness landscape. However, it would require testing all mutations in all backgrounds, making the definition and analysis of fitness landscapes mostly inaccessible. Instead of postulating a particular fitness landscape, we address this problem by considering general classes of landscapes and calculating an upper limit for the time it takes for a population to reach a fitness peak, circumventing the need to have full knowledge about the fitness landscape. We analyze populations in the weak-mutation regime and characterize the conditions that enable them to quickly reach the fitness peak as a function of the number of sites under selection. We show that for additive landscapes there is a critical selection strength enabling populations to reach high-fitness genotypes, regardless of the distribution of effects. This threshold scales with the number of sites under selection, effectively setting a limit to adaptation, and results from the inevitable increase in deleterious mutational pressure as the population adapts in a space of discrete genotypes. Furthermore, we show that for the class of all unimodal landscapes this condition is sufficient but not necessary for rapid adaptation, as in some highly epistatic landscapes the critical strength does not depend on the number of sites under selection; effectively removing this barrier to adaptation.
Mediating colonial marginality and (minor) ity in Isabel de Guevara´s Carta a la Princesa Doña Juana
Authors: Marrero-Fente Raul , Ehrenburg Scott 
Published: November 2016

Escrito em 1556 por um dos participantes da conquista e colonização do Rio da Prata, a carta de Isabel de Guevara para a princesa Juana é um testemunho crucial de seu tempo. O valor desse documento vem da condição pessoal do autor, definida como testemunha ocular dos fatos descritos. É dessa maneira que ela estabelece a verossimilitude da narração baseada no discurso jurídico. Esse artigo busca interrogar as construções binarias de colonial/imperial, margem/centro e local/global, a partir de um exame da carta de Isabel de Guevara em um contexto hispano-americano mais amplo.
Além da Dádiva ou da Conquista: as interpretações da questão social no Chile e no Brasil
Authors: Cortés Alexis 
Published: November 2016

Como as ciências sociais compreenderam a questão social no Chile e no Brasil durante o século XX? No campo historiográfico, nestes países latinoamericanos, inicialmente foram produzidas interpretações opostas para compreender o desenvolvimento da questão social. Se no Chile foi interpretada como uma conquista operária resultante da força do movimento político-sindical; no Brasil, pelo contrário, o mesmo fenômeno foi entendido como uma “dádiva” estatal-populista, produto da passividade operária. Posteriormente, estas leituras clássicas foram questionadas por perspectivas que mostraram uma relação entre movimento operário e Estado muito mais complexa que terminou por redefinir ambos os termos. Assim, revisitar criticamente estas interpretações é um exercício que permite uma aproximação ao como as ciências sociais formam parte das lutas que elas descrevem.
O protagonismo midiático da multidão nos movimentos sociais
Authors: Torres Eduardo Cintra 
Published: November 2016

A importância adquirida por movimentos sociais e pela sua expressão multitudinária e midiática na vida política e social de países como o Egito, a Tunísia, o Brasil, a Turquia ou a Ucrânia é aceita com unanimidade pelos analistas na imprensa e nos estudos acadêmicos. Este artigo pretende refletir sobre aspectos que, todavia, não parecem estar devidamente identificados e estabelecidos: o momento de multidão como, ainda e sempre, o ponto de viragem no impacto de um movimento social; a relevância da multidão para além do eventual fracasso dos objetivos que a motivaram; a explicação da manutenção da importância das midias “tradicionais” na era da Internet e das redes sociais eletrônicas; a filiação histórica das principais características do fenômeno multitudinário e o acento correto no que é realmente novo, caso do marcado empoderamento do indivíduo em algumas multidões contemporâneas, como as do Brasil em 2013, e a fluidez do ativismo nas democracias desenvolvidas.
Heredera de Pedro Madrigal: María de Quiñones, impresora de ingenios áureos
Authors: Ortega Davinia Rodríguez 
Published: November 2016

Este artigo discute a história da imprensa fundada por Pedro Madrigal em 1585 em Madrid, depois de deixar sua oficina em Salamanca. Após a morte do editor, sucederam-no no manejo das prensas sua viúva, Maria Rodriguez, seu “filho” Pedro Madrigal, Juan de la Cuesta e Maria de Quiñones. Esta última aproveitou uma oportunidade privilegiada de negócios e levou consigo o livreiro Pedro Coello para imprimir comédias após o fim da proibição, em 1634. Assim, da sua impressão surgiram peças de comédias de grandes autores da Idade de Ouro como Tirso de Molina, Calderon de la Barca e Lope de Vega, entre outros.
El cancionero cubano entre lo letrado y lo popular: “La cleptómana” de Acosta y Luna frente a “La cocainómana” de Matamoros
Authors: Feble Jorge 
Published: November 2016

En este estudio se propone en esencia que “La cocainómana”, son guapachoso compuesto por Miguel Matamoros para su conocido Trío a principios de 1930, se inspira cuando menos parcialmente en “La cleptómana”, canción romántica de Manuel Luna, la cual respeta íntegra- mente el soneto del mismo título dado a conocer por Agustín Acosta en su poe- mario Ala (1915). “La cleptómana”, pieza clave de la vieja y la nueva trova cuba- nas, refleja el convencional prurito mi- sógino de índole romántico-modernista fundamentado en la ladrona de corazo- nes. Se arguye que ese componente del cancionero cubano responde más bien, al menos en un comienzo, a las elegan- tes consideraciones de la clase letrada, no obstante el origen popular de muchos de sus intérpretes y hasta compositores. Para llegar a esa conclusión, el ensayo se apoya en las ideas de musicólogos como Frances Aparicio, Alejo Carpen- tier, Ned Sublette, Tony Évora, Cristóbal Díaz Ayala, Robin Moore y demás, así como en nociones expuestas por Bajtín, Frances Aparicio, Raphael Dalleo y Án- gel Rama. Palabras clave: Poema-canción, Bolero, Son, Archivo popular, Performance.
Los tonos de la Luna Verde: la lucha por los significados del Green Moon Festival en la isla de San Andrés
Authors: Piamba Tulcán Diva Marcela , Silva Eduardo Antonio 
Published: November 2016

Este artículo presenta una serie de re- flexiones sobre el Green Moon Festival que se realiza en la isla de San Andrés (Colombia), las tradiciones musicales que allí se presentan y las identidades que se construyen alrededor del even- to. A partir de una comparación de dos textos que referencian el Festival en sus inicios y de una etnografía reciente, se hace un análisis de las transformacio- nes y resignificaciones que ha tomado el evento, mostrando el Festival como un lugar ambivalente que oscila entre inte- reses de cooptación estatal/comercial y reivindicaciones identitarias. Palabras clave: San Andrés Islas, Identidad, Etnografía, Música, Colombianización.
El terreiro de candomblé representado en la poética de Aloísio Resende y Solano Trindade
Authors: Lima Santos Denilson 
Published: November 2016

El conocimiento de las tradiciones yoru- ba y bantú está presente en la sociedad brasileña. Esto se debe a la mancha in- deleble de la esclavitud. Desplazados, sin derecho a llevar nada, solo con el conocimiento que se imprimió en sus cuerpos, los africanos han reconstrui- do nuevas territorialidades y saberes en Brasil. A partir de esta antigua herencia, en este ensayo nos proponemos plan- tear cómo los poetas Aloísio Resende y Solano Trindade hacen de la visión del mundo africano aprendida en la comuni- dad/terreiro una propuesta poética que está en contra de la estética hegemóni- ca. Por lo tanto, se han comparado los poemas de los dos escritores con el fin de comprender el lenguaje que reinven- ta el espacio de la ancestralidad. Palabras clave Terreiro, Yoruba, Bantú, Poema, Ances- tralidad.
“Barro na mão do oleiro”: materialidades e sensibilidades na interface entre ensino de História e educação profissional
Authors: Pirola André Luiz Bis , Leite Juçara Luzia 
Published: November 2016

Este artigo tem por objetivo analisar a interseção entre Ensino de história e Educação Profissional como via significativa para a superação de dualismos educacionais. A partir de estudos da história cultural que evocaram a noção de materialidade, propõe-se uma reflexão que dá ênfase à indissociabilidade entre as condições formais, tecnológicas, materiais e aos sentidos múltiplos elaborados pelos sujeitos históricos que intervêm em tais condições. Nesse sentido, o artigo demonstra como ensino e história, contanto que atentos às materialidades e sensibilidades, constituem dimensões imprescindíveis ao entendimento das lutas entre práticas e representações, formas e reformas que pretendem limitar as possibilidades da educação profissional e a própria possibilidade de transcender tais limitações.
Práticas pedagógicas e a formação humana no Ensino Médio Integrado
Authors: Souza Francisco das Chagas Silva , Medeiros Neta Olivia Morais de 
Published: November 2016

Ronaldo Marcos de Lima Araujo é bolsista de Produtividade em Pesquisa do CNPq. Pedagogo, mestre em História e Filosofia da Educação (PUC-SP), doutor em Educação (UFMG) e pós-doutor (UERJ). É Professor Associado do Instituto de Ciências da Educação da UFPA, atuando como professor da graduação e da pós-graduação nos cursos de mestrado e doutorado. É coordenador do Grupo de Estudos e Pesquisas sobre Trabalho e Educação, na UFPA. Mantém produção bibliográfica regular voltada sobretudo à área de Trabalho e Educação e, em particular, ao ensino médio e à educação profissional. Atualmente coordena o Programa de Pós-Graduação em Currículo e Gestão da Escola Básica. Nesta entrevista, ele discute a necessidade de desenvolvermos práticas pedagógicas emancipatórias, ou seja, que permitam aos jovens a interpretação e a intervenção na realidade. Considera o pesquisador que, na Educação Profissional, o ensino das Ciências Humanas não é apenas um direito, mas também uma necessidade para que se ponha em prática um projeto de formação humana ampla e que vá além da formação de mão de obra para o mercado. Especificamente no tocante ao ensino de História, o professor Ronaldo destaca que a sua relevância está no fato de esse ensino ser estratégico para que o jovem conheça a historicidade dos fenômenos e das tecnologias na sociedade em que está inserido.
Multi-scale Simulations of Dry Friction Using Network Simulation Method
Authors: Marín F. , Alhama F. , Solano J. , Meroño P.A. , Sánchez J.F. 
Published: November 2016

Abstract
The study of everyday phenomena involving friction continues to maintain a high level of difficulty despite its long history. The causes of this problem lie in the different scale of the characteristics of the phenomenon, macroscopic and microscopic. Thus, very different models, valid in a narrow scope which prevents generalization, have been appearing. This survey presents the application of network simulation method to the numerical solution to the study of friction at very different scales. On the one hand, on a microscopic scale an atomic force microscope model has been studied, related to the analysis of soft surfaces at the atomic scale. Furthermore, on a macroscopic scale model related to the analysis of an industrial device, such as a brake mechanism has been studied. After presenting herein is a review of the different formulations of the friction force, the nature of the surfaces involved in the phenomenon, as well as the definition of the problems to be analyzed. The design of network models and the implementation of the initial conditions are explained. The results of the application of network models to selected problems are presented. In order to verify the reliability of the proposed models, their results are compared with the solutions obtained by other numerical methods or experimental results, one from a device developed during the preparation of this report.