abstract：:Twelve female division I collegiate volleyball players were recruited to examine the reliability of several methods for calculating the rate of force development (RFD) during the isometric midthigh clean pull. All subjects were familiarized with the isometric midthigh clean pull and participated in regular strength tr...

journal_title：Journal of strength and conditioning research

authors： Haff GG,Ruben RP,Lider J,Twine C,Cormie P

更新日期：2015-02-01 00:00:00

abstract：:The purpose of this study was to determine the responses of testosterone and cortisol, with special reference to playing positions, playing time (PT), and phase of the season. We performed a follow-up study during 4 consecutive seasons to investigate the effects of PT, positional role, and phase of the season on anabo...

journal_title：Journal of strength and conditioning research

authors： Schelling X,Calleja-González J,Torres-Ronda L,Terrados N

更新日期：2015-02-01 00:00:00

abstract：:Few studies have compared single-bundle (SB) and double-bundle (DB) anterior cruciate ligament reconstruction (ACLR) in the knee joint during activities involving change-of-direction maneuvers and knee rotation. This study examined whether the type of ACLR contributes to postphysiotherapy outcomes, with an emphasis on...

journal_title：Journal of strength and conditioning research

authors： Czamara A,Królikowska A,Szuba Ł,Widuchowski W,Kentel M

更新日期：2015-02-01 00:00:00

abstract：:The purpose of this study was to analyze multiple effects of an extended interval training (EIT) protocol on countermovement jump (CMJ) and handgrip strength in endurance athletes and to determine the relationship between fatigue and potentiation. Thirty experienced sub-elite male long-distance runners (age = 28.26 ± ...

journal_title：Journal of strength and conditioning research

authors： García-Pinillos F,Soto-Hermoso VM,Latorre-Román PA

更新日期：2015-01-01 00:00:00

abstract：:The past 2-3 decades have seen an explosion in analytical areas related to "omic" technologies. These advancements have reached a point where their application can be and are being used as a part of exercise physiology and sport performance research. Such advancements have drastically enabled researchers to analyze ex...

journal_title：Journal of strength and conditioning research

authors： Kerksick CM,Tsatsakis AM,Hayes AW,Kafantaris I,Kouretas D

更新日期：2015-01-01 00:00:00

abstract：:Naval Special Warfare (NSW) Operators are expected to maintain a high degree of physical readiness requiring continual operational training. The physiological and psychological demands associated with operational training can result in physiological consequences evidenced by hormonal alterations justifying the need fo...

journal_title：Journal of strength and conditioning research

authors： Oliver JM,Abt JP,Sell TC,Beals K,Wood DE,Lephart SM

更新日期：2015-01-01 00:00:00

abstract：:This study examined the physical and decision-making requirements of elite Australian football (AF) umpires during match play. Twenty-nine field umpires were assessed across 20 AF League matches. Physical demands were monitored using global positioning system devices to record the total distance covered and high-speed...

journal_title：Journal of strength and conditioning research

authors： Elsworthy N,Burke D,Scott BR,Stevens CJ,Dascombe BJ

更新日期：2014-12-01 00:00:00

abstract：:The back squat is a traditional resistance training exercise, whereas the resisted sled exercise is a relatively new resistance exercise. However, as there are no studies comparing muscle activation between the exercises, the objective of this study was to examine activity of leg and trunk muscles for both exercises. ...

journal_title：Journal of strength and conditioning research

authors： Maddigan ME,Button DC,Behm DG

更新日期：2014-12-01 00:00:00

abstract：:The purpose of this study was to determine the effects of a 12-week strength training program on movement time (MT) on fencers of national level. Twelve male fencers were randomly divided into 2 groups: the control group (CG: N = 6; age, 22.3 ± 8.1 years) and the treatment group (TG: N = 6; age, 24.8 ± 7.2 years). The...

journal_title：Journal of strength and conditioning research

authors： Redondo JC,Alonso CJ,Sedano S,de Benito AM

更新日期：2014-12-01 00:00:00

abstract：:Despite the ubiquitous use of the flexed arm hang (FAH) as a field test of muscular fitness, evidence for the construct validity of it is lacking. The strongest validity coefficients (r) to date are 0.71 and 0.72 found by correlating modified versions of the FAH (i.e., 90 and 180° of elbow extension, respectively) wit...

journal_title：Journal of strength and conditioning research

authors： Clemons JM

更新日期：2014-12-01 00:00:00

abstract：:This study investigated the changes in anthropometry and performance, and their interrelationships, across 3 consecutive seasons (under-15 to under-17 age groups) in elite youth rugby league players. Each player participated in annual anthropometrical and performance assessments, comprising measurements of stature; bo...

journal_title：Journal of strength and conditioning research

authors： Waldron M,Worsfold P,Twist C,Lamb K

更新日期：2014-11-01 00:00:00

abstract：:The present study aimed to determine the concurrent validity of ultrasound (US) measurement of the vastus lateralis muscle (VL) cross-sectional area (CSA) having magnetic resonance imaging (MRI) as the gold standard measurement, in a heterogeneous sample of participants. Thirty-one individuals (52.44 ± 16.37 years; 1....

journal_title：Journal of strength and conditioning research

authors： Lixandrão ME,Ugrinowitsch C,Bottaro M,Chacon-Mikahil MP,Cavaglieri CR,Min LL,de Souza EO,Laurentino GC,Libardi CA

更新日期：2014-11-01 00:00:00

abstract：:This study reports the average and SD of professional baseball players' cardiorespiratory endurance, maximum oxygen consumption, oxygen consumption during anaerobic threshold, maximum oxygen consumption of anaerobic threshold %, maximum heart rate, and heart rate of anaerobic threshold. We also report the comparison b...

journal_title：Journal of strength and conditioning research

authors： Yang SW

更新日期：2014-11-01 00:00:00

abstract：:Concurrent training (CT) seems to impair training-induced muscle hypertrophy. This study compared the effects of CT, strength training (ST) and interval training (IT) on the muscle fiber cross-sectional area (CSA) response, and on the expression of selected genes involved in the myostatin (MSTN) signaling mRNA levels....

journal_title：Journal of strength and conditioning research

authors： de Souza EO,Tricoli V,Aoki MS,Roschel H,Brum PC,Bacurau AV,Silva-Batista C,Wilson JM,Neves M Jr,Soares AG,Ugrinowitsch C

更新日期：2014-11-01 00:00:00

abstract：:Changes in many aspects of physical capacity and athletic performance have been documented through the course of a competitive season in collegiate athletes. Movement pattern quality as measured by the functional movement screen (FMS) has recently been linked to performance and injury risk. The purpose of this study w...

journal_title：Journal of strength and conditioning research

authors： Sprague PA,Mokha GM,Gatens DR

更新日期：2014-11-01 00:00:00

abstract：:The aim of this study was to compare the effects of acute vibration-enhanced static stretching and/or static stretching alone on the strength and flexibility of the hamstrings and quadriceps muscles. Twenty-one male footballers participated in this study (21.9 ± 1.8 years; 75.54 ± 7.3 kg; 178.7 ± 6.5 cm). The experime...

journal_title：Journal of strength and conditioning research

authors： Jemni M,Mkaouer B,Marina M,Asllani A,Sands WA

更新日期：2014-11-01 00:00:00

abstract：:The aim of this study was to investigate whether supplementing regular preseason futsal training with weekly sessions of repeated sprints (RS) training would have positive effects on repeated sprint ability (RSA) and field test performance. Thirteen players from a professional futsal team (22.6 ± 6.7 years, 72.8 ± 8.7...

journal_title：Journal of strength and conditioning research

authors： Soares-Caldeira LF,de Souza EA,de Freitas VH,de Moraes SM,Leicht AS,Nakamura FY

更新日期：2014-10-01 00:00:00

abstract：:Currently, a submaximal protocol is used to measure cardiorespiratory fitness in firefighters by estimating their true aerobic capacity (V[Combining Dot Above]O2max); however, this submaximal test has not been cross-validated among firefighters. Thirty firefighters (85% male, 15% female), completed the submaximal prot...

journal_title：Journal of strength and conditioning research

authors： Delisle AT,Piazza-Gardner AK,Cowen TL,Huq MB,Delisle AD,Stopka CB,Tillman MD

更新日期：2014-10-01 00:00:00

abstract：:The optimal resisted load for sprint training has not been established yet, although it has been suggested that a resistance reducing the athlete's velocity by more than 10% from unloaded sprinting would entail substantial changes in the athlete's sprinting mechanics. This investigation has evaluated the effects of a ...

journal_title：Journal of strength and conditioning research

authors： Bachero-Mena B,González-Badillo JJ

更新日期：2014-10-01 00:00:00

abstract：:The purpose of this study was to investigate the effect of 4 different step detection thresholds (10, 15, 20, and 30% body mass [BM]) on the kinetics and kinematics of a youth population sprinting on a Woodway nonmotorized treadmill (NMT). A total of 16 male youth athletes sprinted 30 m from a split start position. Of...

journal_title：Journal of strength and conditioning research

authors： Cronin JB,Rumpf MC

更新日期：2014-10-01 00:00:00

abstract：:Hydration is used by athletic governing organizations for weight class eligibility. The measurement of urine specific gravity (USG) as a measure of hydration by reagent strips is a controversial issue. The purpose of this study was to determine the validity of HydraTrend reagent strips that facilitate the correction o...

journal_title：Journal of strength and conditioning research

authors： Abbey BM,Heelan KA,Brown GA,Bartee RT

更新日期：2014-09-01 00:00:00

abstract：:The purpose of this study was to determine the effects of a 12-week contrast training (CT) program (isometric + plyometric), with no external loads, on the vertical jump, kicking speed, sprinting, and agility skills of young soccer players. Thirty young soccer players (age, 15.9 ± 1.43 years; weight, 65.4 ± 10.84 kg; ...

journal_title：Journal of strength and conditioning research

authors： García-Pinillos F,Martínez-Amat A,Hita-Contreras F,Martínez-López EJ,Latorre-Román PA

更新日期：2014-09-01 00:00:00

abstract：:Strenuous physical activity can result in exercise-induced muscle damage. The purpose of this study was to investigate the efficacy of a lower limb compression garment in accelerating recovery from a marathon run. Twenty four subjects (female, n = 7; male, n = 17) completed a marathon run before being assigned to a tr...

journal_title：Journal of strength and conditioning research

authors： Hill JA,Howatson G,van Someren KA,Walshe I,Pedlar CR

更新日期：2014-08-01 00:00:00

abstract：:The purpose of this study was to determine whether inspiratory muscle fatigue (IMF) affects the muscle activity of the latissimus dorsi and pectoralis major during maximal arms only front crawl swimming. Eight collegiate swimmers were recruited to perform 2 maximal 20-second arms only front crawl sprints in a swimming...

journal_title：Journal of strength and conditioning research

authors： Lomax M,Tasker L,Bostanci O

更新日期：2014-08-01 00:00:00

abstract：:Strength and conditioning training programs are essential components of athletic performance, and the effectiveness of these programs can be linked to the strength and conditioning facilities (SCFs) used by athletes. The primary purpose of this study was to provide a statistical overview of National Collegiate Athleti...

journal_title：Journal of strength and conditioning research

authors： Judge LW,Petersen JC,Bellar DM,Craig BW,Cottingham MP,Gilreath EL

更新日期：2014-08-01 00:00:00

abstract：:Implementing objective methods to assess physical performance has become an invaluable component of athlete or player development, monitoring, and talent identification in distinct sports. Many sports depend heavily upon muscular strength, muscle power output, and sprint performance, especially at competition level. T...

journal_title：Journal of strength and conditioning research

authors： Marques MC,Izquierdo M

更新日期：2014-08-01 00:00:00

abstract：:Throwing carries an inherent risk of injury that worsens in the presence of arm fatigue. The purpose of this study was to identify markers that could facilitate the early detection of this type of fatigue, by comparing the response to bouts of throwing-specific and running-based exercise. Thirteen elite junior male ba...

journal_title：Journal of strength and conditioning research

authors： Freeston J,Adams R,Ferdinands RE,Rooney K

更新日期：2014-08-01 00:00:00

abstract：:The aim of this study was to investigate the effects of a resistance training program with excessive training load and insufficient recovery time between bouts on muscle hypertrophy- and atrophy-related protein expression. Male Wistar rats were randomly assigned to either a trained (TR, N = 9) or a sedentary (SE, N = ...

journal_title：Journal of strength and conditioning research

authors： Alves Souza RW,Aguiar AF,Vechetti-Júnior IJ,Piedade WP,Rocha Campos GE,Dal-Pai-Silva M

更新日期：2014-08-01 00:00:00

abstract：:This study investigated the relationship between punching acceleration and selected strength and power variables in 19 professional karate athletes from the Brazilian National Team (9 men and 10 women; age, 23 ± 3 years; height, 1.71 ± 0.09 m; and body mass [BM], 67.34 ± 13.44 kg). Punching acceleration was assessed u...

journal_title：Journal of strength and conditioning research

authors： Loturco I,Artioli GG,Kobal R,Gil S,Franchini E

更新日期：2014-07-01 00:00:00

abstract：:Recently, individualized frequency (I-Freq) has been introduced with the notion that athletes may elicit a greater reflex response at differing levels (Hz) of vibration. The aim of the study was to evaluate acute whole-body vibration as a feasible intervention to increase power in trained cyclists and evaluate the eff...

journal_title：Journal of strength and conditioning research

authors： Surowiec RK,Wang H,Nagelkirk PR,Frame JW,Dickin DC

更新日期：2014-07-01 00:00:00

abstract：:The purpose of this study was to assess the validity and interunit reliability of 10 Hz (Catapult) and 15 Hz (GPSports) Global Positioning System (GPS) units and investigate the differences between these units as measures of team sport athlete movement demands. A team sport simulation circuit was completed by 8 traine...

journal_title：Journal of strength and conditioning research

authors： Johnston RJ,Watsford ML,Kelly SJ,Pine MJ,Spurrs RW

更新日期：2014-06-01 00:00:00

abstract：:During resistance training protocols, people are often encouraged to target the scapular stabilizing musculature (middle and lower trapezius and serratus anterior) while minimizing shoulder prime mover activation (upper trapezius and large glenohumeral muscles) in their training regime, especially in overhead athletes...

journal_title：Journal of strength and conditioning research

authors： De Mey K,Danneels L,Cagnie B,Borms D,TʼJonck Z,Van Damme E,Cools AM

更新日期：2014-06-01 00:00:00

abstract：:The purpose was to compare male and female police students exercise and physical performances at the beginning and the end of a 3-year police education. Two hundred thirty-five subjects answered the survey about exercise and 85 subjects (58 men: age = 23.7 ± 2.8 years, body mass = 82.1 ± 7.8 kg, height = 1.83 ± 0.06 m...

journal_title：Journal of strength and conditioning research

authors： Lagestad P,van den Tillaar R

更新日期：2014-05-01 00:00:00

abstract：:A variety of training approaches have been shown to improve running economy in well-trained athletes. However, there is a paucity of data exploring lower-body determinants that may affect running economy and account for differences that may exist between genders. Sixty-three male and female distance runners were asses...

journal_title：Journal of strength and conditioning research

authors： Barnes KR,Mcguigan MR,Kilding AE

更新日期：2014-05-01 00:00:00

abstract：:The NFL-225 test is widely used to assess the strength level and evaluate the progress of college football players during resistance training. Despite the studies evaluating the validity of this test, there are no reports assessing its reliability. The purpose of this study was to determine the reliability and smalles...

journal_title：Journal of strength and conditioning research

authors： Mann JB,Ivey PJ,Brechue WF,Mayhew JL

更新日期：2014-05-01 00:00:00

abstract：:The aim of this study was to investigate whether a novel heart rate (HR)-running speed index could be used in monitoring adaptation to endurance training. Forty-five recreational runners underwent a 2-phased 28-week training regime. The first 14 weeks included basic endurance training, whereas the second 14 weeks were...

journal_title：Journal of strength and conditioning research

authors： Vesterinen V,Hokka L,Hynynen E,Mikkola J,Häkkinen K,Nummela A

更新日期：2014-04-01 00:00:00

abstract：:We examined the effects of 18 weeks of strength and high-intensity training on key sport performance measures of elite male water polo (WP) players. Twenty-seven players were randomly assigned to 2 groups, control (in-water training only) and strength group, (strength training sessions [twice per week] + in-water trai...

journal_title：Journal of strength and conditioning research

authors： Ramos Veliz R,Requena B,Suarez-Arrones L,Newton RU,Sáez de Villarreal E

更新日期：2014-04-01 00:00:00

abstract：:The purpose of this study was to analyze the acute effect of static stretching on the performance of multiple sets in the bench press (BP) exercise. Fifteen men (26.2 ± 0.7 years, 72.4 ± 1.3 kg, 1.78 ± 0.1 m, 22.8 ± 0.3 kg·m) performed 4 sets of the BP exercise at 80% of 1 repetition maximum until concentric failure, ...

journal_title：Journal of strength and conditioning research

authors： Ribeiro AS,Romanzini M,Dias DF,Ohara D,da Silva DR,Achour A Jr,Avelar A,Cyrino ES

更新日期：2014-04-01 00:00:00

abstract：:Abnormal movement patterns have been identified as important prospective risk factors for lower extremity injury, including anterior cruciate ligament injury. Specifically, poor neuromuscular control during the early landing phase has been associated with increased injury risk. Although it is commonly assumed that hig...

journal_title：Journal of strength and conditioning research

authors： Theiss JL,Gerber JP,Cameron KL,Beutler AI,Marshall SW,Distefano LJ,Padua DA,de la Motte SJ,Miller JM,Yunker CA

更新日期：2014-04-01 00:00:00

abstract：:Low vitamin D, commonly assessed as serum 25-hydroxyvitamin D (25OHD), is associated with the development of many age-related chronic diseases. A positive relationship exists between elevated 25OHD and muscle synthesis, strength, power, and decreased body fat in elderly individuals. However, these findings have not be...

journal_title：Journal of strength and conditioning research

authors： Forney LA,Earnest CP,Henagan TM,Johnson LE,Castleberry TJ,Stewart LK

更新日期：2014-03-01 00:00:00