abstract：:The nature of muscular contractions and episodes of impact loading during technical rock climbing are often varied and complex, and the resulting effects on bone health are unclear. The purpose of this study was to compare total body, lumbar spine, proximal femur, and forearm areal bone mineral density (aBMD) and tibi...

journal_title：Journal of strength and conditioning research

authors： Sherk VD,Bemben MG,Bemben DA

更新日期：2010-09-01 00:00:00

abstract：:Ventilatory threshold (VT) has been used to measure physiological occurrences in athletes through models via gas analysis with limited accuracy. The purpose of this study is to establish a mathematical model to more accurately detect the ventilatory threshold using the ventilatory equivalent of carbon dioxide (VE/VCO2...

journal_title：Journal of strength and conditioning research

authors： Gregg JS,Wyatt FB,Kilgore JL

更新日期：2010-09-01 00:00:00

abstract：:Weightlifting training and competition involves lifting a revolving shaft bar loaded with weights. The design of a bar and the location of the weights result in bar deformation during lifting tasks. Because there are many manufacturers of weightlifting bars, the actual deformation of a bar may vary, depending on the s...

journal_title：Journal of strength and conditioning research

authors： Chiu LZ

更新日期：2010-09-01 00:00:00

abstract：:When climbing stairs, there are 2 practical strategies, contact each step with alternating feet (single) or contact every other step (double) with alternating feet. Our purpose was to evaluate the metabolic cost and muscular activity of these single and double stair-climbing strategies. We hypothesized that metabolic ...

journal_title：Journal of strength and conditioning research

authors： Gottschall JS,Aghazarian GS,Rohrbach EA

更新日期：2010-09-01 00:00:00

abstract：:The ability to develop force quickly is a requisite ability in most sports. The reactive strength index (RSI) has been developed as a measure of explosive strength and is derived by evaluating jump height divided by ground contact time during the depth jump (DJ). At present, the RSI is typically used to evaluate DJ pe...

journal_title：Journal of strength and conditioning research

authors： Ebben WP,Petushek EJ

更新日期：2010-08-01 00:00:00

abstract：:The purpose of this study was to examine the impact of nutritional feedback on dietary intake and body composition of college women volleyball players. Eight members of an National Collegiate Athletic Association (NCAA) division II women's volleyball team participated as subjects. Three-day diet records and body compo...

journal_title：Journal of strength and conditioning research

authors： Anderson DE

更新日期：2010-08-01 00:00:00

abstract：:The affective benefits associated with aerobic exercise are well documented. However, literature concerning resistance exercise has suggested a more variable response (i.e., a short duration increase in state anxiety, which eventually is reduced below baseline) and thus may play an important role in the adoption and m...

journal_title：Journal of strength and conditioning research

authors： Bibeau WS,Moore JB,Mitchell NG,Vargas-Tonsing T,Bartholomew JB

更新日期：2010-08-01 00:00:00

abstract：:The objective of the present study was to investigate the effects of static and dynamic stretching alone and in combination on subsequent agility, sprinting, and jump performance. Eight different stretching protocols: (a) static stretch (SS) to point of discomfort (POD); (b) SS less than POD (SS

journal_title：Journal of strength and conditioning research

authors： Chaouachi A,Castagna C,Chtara M,Brughelli M,Turki O,Galy O,Chamari K,Behm DG

更新日期：2010-08-01 00:00:00

abstract：:The aim of this study was to analyze the physiological responses to a tap dance choreography and to compare with those observed during a maximal treadmill exercise test, in tap dancers. Eight women (19.6 +/- 2.4 years; 162.3 +/- 4.4 cm; 54.0 +/- 2.3 kg; 20.5 +/- 1.4 kg.m; and 5.1 +/- 2.6 years of tap dance training) w...

journal_title：Journal of strength and conditioning research

authors： Oliveira SM,Simões HG,Moreira SR,Lima RM,Almeida JA,Ribeiro FM,Puga GM,Campbell CS

更新日期：2010-07-01 00:00:00

abstract：:The purpose of this study was to examine relationships between laboratory tests and on-ice skating performance in division I men's hockey athletes. Twenty-one men (age 20.7 +/- 1.6 years) were assessed for body composition, isokinetic force production in the quadriceps and hamstring muscles, and anaerobic muscle power...

journal_title：Journal of strength and conditioning research

authors： Potteiger JA,Smith DL,Maier ML,Foster TS

更新日期：2010-07-01 00:00:00

abstract：:Based on electromyographic (EMG) studies, an anterior (in front of the face) wide grip with a pronated forearm has been recommended as the optimal lat pull-down (LPD) variation for strengthening the latissimus dorsi (LD) (Signorile, JF, Zink, A, and Szwed, S. J Strength Cond Res 16: 539-546, 2002; Wills, R, Signorile,...

journal_title：Journal of strength and conditioning research

authors： Lusk SJ,Hale BD,Russell DM

更新日期：2010-07-01 00:00:00

abstract：:The aim of this study is to evaluate repeated sprinting ability and fatigue index of amateur soccer players according to their positions. A total of 85 amateur soccer players were examined in different clubs in Turkey. The repeated sprint test, which was designed by Bangsbo, was used for soccer players. We did not fin...

journal_title：Journal of strength and conditioning research

authors： Kaplan T

更新日期：2010-06-01 00:00:00

abstract：:The purpose of this study was to analyze the influence of exercise type, set configuration, and relative intensity load on relationship between 1 repetition maximum (1RM) and maximum number of repetitions (MNR). Thirteen male subjects, experienced in resistance training, were tested in bench press and biceps curl for ...

journal_title：Journal of strength and conditioning research

authors： Iglesias E,Boullosa DA,Dopico X,Carballeira E

更新日期：2010-06-01 00:00:00

abstract：:This study analyzed the effect of an acute static stretching bout on the time to exhaustion (Tlim) at power output corresponding to VO2max. Eleven physically active male subjects (age 22.3+/-2.8 years, VO2max 2.7+/-0.5 L.min) completed an incremental cycle ergometer test, 2 muscle strength tests, and 2 maximal tests t...

journal_title：Journal of strength and conditioning research

authors： Samogin Lopes FA,Menegon EM,Franchini E,Tricoli V,de M Bertuzzi RC

更新日期：2010-06-01 00:00:00

abstract：:The purpose of the present study was to evaluate the effects of cycle ergometry high-intensity interval training (HIIT) with and without beta-alanine supplementation on maximal oxygen consumption rate (VO2 peak), cycle ergometer workload at the ventilatory threshold (VT W), and body composition. Forty-four women (mean...

journal_title：Journal of strength and conditioning research

authors： Walter AA,Smith AE,Kendall KL,Stout JR,Cramer JT

更新日期：2010-05-01 00:00:00

abstract：:The purpose of this study was to determine abdominal muscle temporal responses to a leg-loading exercise protocol and if differences exist between those able and unable to minimize lumbar-pelvic motion during this protocol. The focus was a supine bilateral leg-loading task that incorporated a slide (level 4) or no sli...

journal_title：Journal of strength and conditioning research

authors： Hubley-Kozey CL,Hatfield GL,Davidson KC

更新日期：2010-05-01 00:00:00

abstract：:This study was undertaken to examine the role of interset stretching on the time course of acceleration portion AP and mean velocity profile during the concentric phase of 2 bench-press sets with a submaximal load (60% of the 1 repetition maximum). Twenty-five college students carried out, in 3 different days, 2 conse...

journal_title：Journal of strength and conditioning research

authors： García-López D,Izquierdo M,Rodríguez S,González-Calvo G,Sainz N,Abadía O,Herrero AJ

更新日期：2010-05-01 00:00:00

abstract：:The current study examined muscle DNA and protein concentrations ([ ]) and the [RNA] (assumed to represent translational capacity), [RNA]:[DNA] (assumed to represent transcriptional efficiency) and [protein]:[RNA] (assumed to represent translational efficiency) in younger vs. older participants during a resting state....

journal_title：Journal of strength and conditioning research

authors： Roberts MD,Kerksick CM,Dalbo VJ,Hassell SE,Tucker PS,Brown R

更新日期：2010-05-01 00:00:00

abstract：:An acute bout of traditional resistance training (TRAD) increases energy expenditure (EE) both during exercise and in the postexercise period. Reciprocal supersets (SUPERs) are a method of resistance training that alternates multiple sets of high-intensity agonist-antagonist muscle groups with limited recovery. The pu...

journal_title：Journal of strength and conditioning research

authors： Kelleher AR,Hackney KJ,Fairchild TJ,Keslacy S,Ploutz-Snyder LL

更新日期：2010-04-01 00:00:00

abstract：:The active manual straight leg raise (ASLR) and passive manual straight leg raise (MSLR) tests are commonly used in clinical settings to assess hamstring tightness. However, to our knowledge, the validity and sensitivity of these tests have not been compared with the instrumental straight leg raise (ISLR). The aim of ...

journal_title：Journal of strength and conditioning research

authors： Ylinen JJ,Kautiainen HJ,Häkkinen AH

更新日期：2010-04-01 00:00:00

abstract：:We analyze the outcome on testosterone (T) and cortisol (C) responses in 12 professional basketball players during a season of competition. Serum adrenocorticotropic hormone (ACTH), C, total testosterone (TT), and free testosterone (FT) levels were analyzed in October, December, March, and April. A day after the games...

journal_title：Journal of strength and conditioning research

authors： Martínez AC,Seco Calvo J,Tur Marí JA,Abecia Inchaurregui LC,Orella EE,Biescas AP

更新日期：2010-04-01 00:00:00

abstract：:This study was conducted to investigate whether the low-frequency (5-Hz) oscillatory vibration-like stimulus, purported to be delivered by exercising with Flexi-bar, acutely affects muscle activation and maximal voluntary contraction (MVC) force. Nine healthy men participated in 2 trials, separated by at least 1 week,...

journal_title：Journal of strength and conditioning research

authors： Mileva KN,Kadr M,Amin N,Bowtell JL

更新日期：2010-03-01 00:00:00

abstract：:The purpose of this study was to investigate the relation between training load, recovery, and monthly field test performance in young elite soccer players to develop training guidelines to enhance performance. In a prospective, nonexperimental cohort design, 18 young elite soccer players registered training and match...

journal_title：Journal of strength and conditioning research

authors： Brink MS,Nederhof E,Visscher C,Schmikli SL,Lemmink KA

更新日期：2010-03-01 00:00:00

abstract：:The purpose of the present study was to compare the changes in muscle strength in nontrained young males performing resistance training under different supervision ratios. One hundred twenty-four young men were randomly assigned to groups trained under a high (HS, 1:5 coach to athlete ratio) or low (LS, 1:25) supervis...

journal_title：Journal of strength and conditioning research

authors： Gentil P,Bottaro M

更新日期：2010-03-01 00:00:00

abstract：:The bench press exercise exists in multiple forms including the machine and free weight bench press. It is not clear though how each mode differs in its effect on muscle activation. The purpose of this study was to compare muscle activation of the anterior deltoid, medial deltoid, and pectoralis major during a Smith m...

journal_title：Journal of strength and conditioning research

authors： Schick EE,Coburn JW,Brown LE,Judelson DA,Khamoui AV,Tran TT,Uribe BP

更新日期：2010-03-01 00:00:00

abstract：:In prior research, we used 4 stability platform tests as a measurement of core stability and found that scores on the third and fourth days of testing were essentially the same for each of the 4 tests. Lafayette Instrument Co. subsequently made us a prototype stability platform to enhance this research. The purpose of...

journal_title：Journal of strength and conditioning research

authors： Liemohn WP,Baumgartner TA,Fordham SR,Srivatsan A

更新日期：2010-02-01 00:00:00

abstract：:The Functional Movement Screen (FMS) is a series of 7 tests that categorize fundamental movement. Each test is scored on an ordinal scale with 4 categories. The purpose of this study was to determine the interrater reliability of the FMS. Forty healthy subjects were videotaped while performing the FMS. The videos were...

journal_title：Journal of strength and conditioning research

authors： Minick KI,Kiesel KB,Burton L,Taylor A,Plisky P,Butler RJ

更新日期：2010-02-01 00:00:00

abstract：:The national Italian cross-country ski team has been evaluated on the basis of a new double poling cross-country roller skiing incremental test to exhaustion (DP) on a motorized driven treadmill. To verify the capacity of this specific test to predict performance, peak oxygen uptake (VO2peak), oxygen uptake at anaerob...

journal_title：Journal of strength and conditioning research

authors： Fabre N,Balestreri F,Leonardi A,Schena F

更新日期：2010-02-01 00:00:00

abstract：:Plyometric exercises are frequently used in strength and conditioning and rehabilitation programs because the landing phase of these exercises requires dynamic stabilization. This study examined the differences in landing stability of a variety of plyometric exercises by assessing time to stabilization (TTS), its reli...

journal_title：Journal of strength and conditioning research

authors： Ebben WP,Vanderzanden T,Wurm BJ,Petushek EJ

更新日期：2010-02-01 00:00:00

abstract：:The value of warming-up is a worthy research problem because it is not known whether warming-up benefits, harms, or has no effect on individuals. The purpose of this study was to review the evidence relating to performance improvement using a warm-up. A systematic review and meta-analysis were undertaken. Relevant stu...

journal_title：Journal of strength and conditioning research

authors： Fradkin AJ,Zazryn TR,Smoliga JM

更新日期：2010-01-01 00:00:00

abstract：:A relatively new and scarcely researched technique to increase strength is the use of supplemental heavy chain resistance (SHCR) in conjunction with plate weights to provide variable resistance to free weight exercises. The purpose of this case study was to determine the actual resistance being provided by a double-lo...

journal_title：Journal of strength and conditioning research

authors： Neelly KR,Terry JG,Morris MJ

更新日期：2010-01-01 00:00:00

abstract：:The purpose of the present study was to investigate the aerobic capacity characteristics of an isocaloric carbohydrate (CHO) plus protein (PRO) drink and a low-calorie CHO plus PRO drink against a traditional 6% CHO sports beverage. Twelve male and female trained cyclists exercised on 4 separate occasions at intensiti...

journal_title：Journal of strength and conditioning research

authors： Martínez-Lagunas V,Ding Z,Bernard JR,Wang B,Ivy JL

更新日期：2010-01-01 00:00:00

abstract：:Elastic bands added to traditional free-weight techniques have become a part of suggested training routines in recent years. Because of the variable loading patterns of elastic bands (i.e., greater stretch produces greater resistance), it is necessary to quantify the exact loading patterns of bands to identify the vol...

journal_title：Journal of strength and conditioning research

authors： Shoepe TC,Ramirez DA,Almstedt HC

更新日期：2010-01-01 00:00:00

abstract：:We examined whether elbow position affects the handgrip strength in adolescents. The criterion-related validity and reliability of the Jamar, DynEx, and TKK dynamometers were also analyzed. A total of 66 adolescents aged 12 to16 years performed the handgrip strength test with the elbow extended and flexed at 90 degree...

journal_title：Journal of strength and conditioning research

authors： España-Romero V,Ortega FB,Vicente-Rodríguez G,Artero EG,Rey JP,Ruiz JR

更新日期：2010-01-01 00:00:00

abstract：:The purpose of the study was to determine how manipulation of peripheral blood flow during resistance exercise using a light load affected perception and physiological measures compared with moderate load resistance exercise and a control trial. Seven subjects performed a 3 (session) by 2 (biceps curls and calf extens...

journal_title：Journal of strength and conditioning research

authors： Hollander DB,Reeves GV,Clavier JD,Francois MR,Thomas C,Kraemer RR

更新日期：2010-01-01 00:00:00

abstract：:The purpose of this study was to evaluate the effect of basketball training on the muscle strength of adults with mental retardation (MR). Twenty-four adults with and without MR were separated into 3 groups. Eight adults (mean age 25.4 years) with normal IQ constituted the control group (NIQ). Eight adults (mean age 2...

journal_title：Journal of strength and conditioning research

authors： Tsimaras VK,Samara CA,Kotzamanidou MC,Bassa EI,Fotiadou EG,Kotzamanidis CM

更新日期：2009-12-01 00:00:00

abstract：:The purpose of this study was to examine the effect of work-interval duration (WID) and intensity on the time spent at, or above, 95% VO2max (T95 VO2max) during intermittent bouts of supramaximal exercise. Over a 5-week period, 7 physically active men with a mean (+/-SD) age, height, body mass, and VO2max of 22 +/- 5 ...

journal_title：Journal of strength and conditioning research

authors： Wakefield BR,Glaister M

更新日期：2009-12-01 00:00:00

abstract：:The purpose of the present study was to examine effects of time-of-day-specific strength training on muscle hypertrophy and maximal strength in men. A training group underwent a 10-week preparatory training (wk 0-wk 10) scheduled between 17:00 and 19:00 hours. Thereafter, the subjects were randomized either to a morni...

journal_title：Journal of strength and conditioning research

authors： Sedliak M,Finni T,Cheng S,Lind M,Häkkinen K

更新日期：2009-12-01 00:00:00

abstract：:Strength is a critical factor in the health and job performance of police officers. Using a retrospective longitudinal design, the purpose of this study was to identify differences in strength scores from initial recruitment to in-service tests and to compare gender differences. Strength changes were also compared in ...

journal_title：Journal of strength and conditioning research

authors： Boyce RW,Jones GR,Schendt KE,Lloyd CL,Boone EL

更新日期：2009-11-01 00:00:00

abstract：:The purpose of the present investigation was to describe the physiological profile of elite Iranian junior freestyle wrestlers. Seventy elite wrestlers (age 19.8 +/- 0.9 years) who were invited to the national training camps, based on their top 10 national ranking, participated in this study. The physiological profile...

journal_title：Journal of strength and conditioning research

authors： Mirzaei B,Curby DG,Rahmani-Nia F,Moghadasi M

更新日期：2009-11-01 00:00:00