abstract：:The purpose of this study was to examine the acute effects of 3 different warm-up protocols with and without a weighted vest on vertical jump (VJ) and long jump (LJ) performance in athletic women. Sixteen subjects (19.7 +/- 1.4 years, 67.0 +/- 10.7 kg, 165.7 +/- 11.4 cm) participated in 3 testing sessions in random or...

journal_title：Journal of strength and conditioning research

authors： Thompsen AG,Kackley T,Palumbo MA,Faigenbaum AD

更新日期：2007-02-01 00:00:00

abstract：:The purpose of the study was to examine the potential for using the mechanomyographic (MMG) signal as a biofeedback method to enhance muscular relaxation and to improve performance during forearm flexion repetitions to fatigue. Twelve adult (mean +/- SD; age: 22.0 +/- 1.1 years) moderately trained subjects (weight: 82...

journal_title：Journal of strength and conditioning research

authors： Evetovich TK,Conley DS,Todd JB,Rogers DC,Stone TL

更新日期：2007-02-01 00:00:00

abstract：:Despite the popularity of resistance training (RT), an accurate method for quantifying its metabolic cost has yet to be developed. We applied indirect calorimetry during bench press (BP) and parallel squat (PS) exercises for 5 consecutive minutes at several steady state intensities for 23 (BP) and 20 (PS) previously t...

journal_title：Journal of strength and conditioning research

authors： Robergs RA,Gordon T,Reynolds J,Walker TB

更新日期：2007-02-01 00:00:00

abstract：:Thirty-two master athletes (shot put, discus, and hammer throw) were divided into 4 groups according to their age (T40 [40 years of age], 50 [50 years of age], 60 [60 years of age], and 75 [75 years of age]). Twenty-eight age-matched men served as controls (C40 [40 years of age], 50 [50 years of age], 60 [60 years of ...

journal_title：Journal of strength and conditioning research

authors： Ojanen T,Rauhala T,Häkkinen K

更新日期：2007-02-01 00:00:00

abstract：:The purpose of this study was to determine whether the addition of chains to a barbell during the performance of the snatch would invoke differences in execution compared with lifting a conventional barbell without chains. Additionally, subjects were asked whether they perceived that the addition of chains had effects...

journal_title：Journal of strength and conditioning research

authors： Coker CA,Berning JM,Briggs DL

更新日期：2006-11-01 00:00:00

abstract：:The purpose of this study was to determine the reliability and validity of a portable force plate when analyzing jumping and landing tasks. Subjects performed 3 drop vertical jumps and 3 drop landings on both a standard strain gauge laboratory force plate and a portable force plate. In contrast to typical laboratory i...

journal_title：Journal of strength and conditioning research

authors： Walsh MS,Ford KR,Bangen KJ,Myer GD,Hewett TE

更新日期：2006-11-01 00:00:00

abstract：:This study compared serum total testosterone (TT) and free testosterone (FT) responses of young (20-26 years, n = 8), middle-aged (38-53 years, n = 7), and older (59-72 years, n = 9) men to resistance exercise. We also examined the relationships between testosterone (T) levels and strength, bone mineral density (BMD),...

journal_title：Journal of strength and conditioning research

authors： Baker JR,Bemben MG,Anderson MA,Bemben DA

更新日期：2006-11-01 00:00:00

abstract：:Aerobic and anaerobic performance of the upper body (UB) and lower body (LB) were assessed by arm cranking and treadmill tests respectively in a comparison of national (N) and international (I) male gymnasts. Force velocity and Wingate tests were performed using cycle ergometers for both arms and legs. In spite of a s...

journal_title：Journal of strength and conditioning research

authors： Jemni M,Sands WA,Friemel F,Stone MH,Cooke CB

更新日期：2006-11-01 00:00:00

abstract：:The purpose of this study was to compare the effect of a dynamic warm up (DWU) with a static-stretching warm up (SWU) on selected measures of power and agility. Thirty cadets at the United States Military Academy completed the study (14 women and 16 men, ages 18-24 years). On 3 consecutive days, subjects performed 1 o...

journal_title：Journal of strength and conditioning research

authors： McMillian DJ,Moore JH,Hatler BS,Taylor DC

更新日期：2006-08-01 00:00:00

abstract：:The aim of this study was to assess the bone status of dancers using calcaneal quantitative ultrasound (QUS). Twenty-four male and 26 female dancers (aged 19-36 years) and 100 age- and sex-matched nonathletic controls were included in this study. QUS parameters (broadband ultrasound attenuation [BUA], speed of sound [...

journal_title：Journal of strength and conditioning research

authors： Oral A,Tarakçi D,Dişçi R

更新日期：2006-08-01 00:00:00

abstract：:The purpose of this study was to investigate differences in fat-free mass and thicknesses of various muscles among judo athletes of different performance levels. The subjects were 69 male judo athletes of 3 different performance levels. Group A was composed of athletes who participated in the Olympic Games or Asian Ga...

journal_title：Journal of strength and conditioning research

authors： Kubo J,Chishaki T,Nakamura N,Muramatsu T,Yamamoto Y,Ito M,Saitou H,Kukidome T

更新日期：2006-08-01 00:00:00

abstract：:The purpose of this study was to investigate the effects of a single bout of whole-body vibration on isometric squat (IS) and countermovement jump (CMJ) performance. Nine moderately resistance-trained men were tested for peak force (PF) during the IS and jump height (JH) and peak power (PP) during the CMJ. Average int...

journal_title：Journal of strength and conditioning research

authors： Cormie P,Deane RS,Triplett NT,McBride JM

更新日期：2006-05-01 00:00:00

abstract：:The purpose of this study was to examine lower extremity kinematics following implementation of the Sportsmetrics Warm-Up for Injury Prevention and Performance (WIPP) training program. The hypothesis was that there would be no difference in landing mechanics between 2 groups of female youth soccer players (9-11 years ...

journal_title：Journal of strength and conditioning research

authors： Grandstrand SL,Pfeiffer RP,Sabick MB,DeBeliso M,Shea KG

更新日期：2006-05-01 00:00:00

abstract：:The purpose of the current study was to compare the effect of 3 different rest intervals on multiple sets of the bench press exercise performed with heavy vs. light loads. Sixteen resistance-trained men performed 2 testing sessions each week for 3 weeks. During the first testing session each week, 5 consecutive sets o...

journal_title：Journal of strength and conditioning research

authors： Willardson JM,Burkett LN

更新日期：2006-05-01 00:00:00

abstract：:The purpose of this study was to investigate the prevalence of dietary supplement use among adolescent athletes. The project was also directed at identifying the sources these student-athletes used for acquiring information about dietary supplements. One hundred thirty nine high school athletes (99 males; 34 females; ...

journal_title：Journal of strength and conditioning research

authors： Scofield DE,Unruh S

更新日期：2006-05-01 00:00:00

abstract：:The purpose of this study was to develop an equation to predict VO2max from a submaximal elliptical cross-trainer test. Fifty-four apparently healthy subjects (25 men and 29 women, mean +/- SD age: 29.5 +/- 7.1 years, height: 173.3 +/- 12.6 cm, weight: 72.3 +/- 7.9 kg, percent body fat: 17.3 +/- 5.0%, and elliptical c...

journal_title：Journal of strength and conditioning research

authors： Dalleck LC,Kravitz L,Robergs RA

更新日期：2006-05-01 00:00:00

abstract：:On the basis of dynamic and kinematic data, this study identifies the type of muscle contraction in unloaded overarm throwing movements. An unloaded throw or nearly unloaded throw is defined as the throw in which the external resistance is too small (e.g., the team handball, baseball, and water polo throws as well as ...

journal_title：Journal of strength and conditioning research

authors： Grezios AK,Gissis IT,Sotiropoulos AA,Nikolaidis DV,Souglis AG

更新日期：2006-02-01 00:00:00

abstract：:Muscle strain is one of the most common injuries, resulting in a decreased range of motion (ROM) in this group of muscles. Systematic stretching over a period of time is needed to increase the ROM. The purpose of this study was to determine if whole-body vibration (WBV) training would have a positive effect on flexibi...

journal_title：Journal of strength and conditioning research

authors： van den Tillaar R

更新日期：2006-02-01 00:00:00

abstract：:This study sought to determine whether a 12-week intermittent (INT; 2 x 15 min.d(-1)) exercise program yielded similar improvements in cardiovascular health and fitness, compared with a traditional 12-week, 30-minute continuous (CON; 1 x 30 min.d(-1)) exercise program. A second purpose was to determine the effects of ...

journal_title：Journal of strength and conditioning research

authors： Quinn TJ,Klooster JR,Kenefick RW

更新日期：2006-02-01 00:00:00

abstract：:The purpose of this study was to determine the effect of football equipment and running surface on sprint performance in NCAA Division II football players (n = 68). Players were timed in the 40-yd sprint on an indoor rubberized track (Day 1) and on an outdoor, natural-grass football field (Day 2) wearing either regula...

journal_title：Journal of strength and conditioning research

authors： Brechue WF,Mayhew JL,Piper FC

更新日期：2005-11-01 00:00:00

abstract：:Adequate abdominal strength prevents work- and sports-related injuries and stabilizes the spine for athletic activities. The double-leg-lowering maneuver (DLLM) is a popular test to assess abdominal strength because of its simplicity; however, its validity and reliability have not been studied thoroughly. To determine...

journal_title：Journal of strength and conditioning research

authors： Ladeira CE,Hess LW,Galin BM,Fradera S,Harkness MA

更新日期：2005-11-01 00:00:00

abstract：:The purpose of this study was to compare energy expenditure of resistance and aerobic exercise matched for total time and relative intensity. Ten trained men (24.3 +/- 3.8 years) performed 30 minutes of intermittent free-weight squatting at 70% of 1 repetition maximum and continuous cycling at 70% of Vo(2)max, in a cr...

journal_title：Journal of strength and conditioning research

authors： Bloomer RJ

更新日期：2005-11-01 00:00:00

abstract：:Tennis requires skill, physical attributes, and strategy. Ball velocity and placement are two of the most important components in winning the faster-paced modern game. Although isokinetic testing has been used to evaluate physical characteristics and injury potential in tennis players, few studies have compared isokin...

journal_title：Journal of strength and conditioning research

authors： Signorile JF,Sandler DJ,Smith WN,Stoutenberg M,Perry AC

更新日期：2005-08-01 00:00:00

abstract：:Previous research has shown that dance class and rehearsal stress different cardiorespiratory energy systems than dance performance. The aim of the present study was to monitor the physiological parameters of a number of dancers during a 12-week rehearsal period and an 8-week performance schedule. Seventeen dancers (8...

journal_title：Journal of strength and conditioning research

authors： Wyon MA,Redding E

更新日期：2005-08-01 00:00:00

abstract：:The physical benefits of a functional exercise circuit are not well known in an elderly population. The purpose of this study was to evaluate the effect of a functional exercise circuit on mobility and perceived health in the elderly. Subjects were 119 men and women (aged 74 [+/-4.2] years) who received pre- and postt...

journal_title：Journal of strength and conditioning research

authors： Whitehurst MA,Johnson BL,Parker CM,Brown LE,Ford AM

更新日期：2005-08-01 00:00:00

abstract：:Pre- and post-game body mass changes were recorded throughout an international rugby union tournament to determine changes in body mass when training and competing on consecutive days. A squad of 28 players with a mean (+/-SD) age of 20.0 yrs (+/-0.6), height of 1.85 m (+/-0.1) and body mass of 94.71 kg (+/-10.71) wer...

journal_title：Journal of strength and conditioning research

authors： Meir RA,Halliday AJ

更新日期：2005-08-01 00:00:00

abstract：:The addition of carbohydrate (CHO) to an acute creatine (Cr) loading regimen has been shown to increase muscle total creatine content significantly beyond that achieved through creatine loading alone. However, the potential ergogenic effects of combined Cr and CHO loading have not been assessed. The purpose of this st...

journal_title：Journal of strength and conditioning research

authors： Theodorou AS,Havenetidis K,Zanker CL,O'Hara JP,King RF,Hood C,Paradisis G,Cooke CB

更新日期：2005-05-01 00:00:00

abstract：:The objective of this study was to determine the relationship between specific performance measures and hockey skating speed. Thirty competitive secondary school and junior hockey players were timed for skating speed. Off-ice measures included a 40-yd (36.9-m) sprint, concentric squat jump, drop jump, 1 repetition max...

journal_title：Journal of strength and conditioning research

authors： Behm DG,Wahl MJ,Button DC,Power KE,Anderson KG

更新日期：2005-05-01 00:00:00

abstract：:Suitability for safe participation in aerobic exercise is typically determined by a cardiopulmonary exercise test, using a treadmill or cycle. With increased participation in strength training by healthy clients as well as rehabilitation patients, there is a need to develop a test for determining suitability for safe ...

journal_title：Journal of strength and conditioning research

authors： Swank AM,Funk DC,Manire JT,DeGruccio LA,Dimitriadis CK,Denny DM

更新日期：2005-05-01 00:00:00

abstract：:It has been suggested that postactivation potentiation (PAP) may be manipulated to enhance both acute performance and chronic adaptation. PAP refers to the phenomenon by which acute muscle force output is enhanced as a result of contractile history. Evidence exists regarding the existence of PAP. However, the determin...

journal_title：Journal of strength and conditioning research

authors： Robbins DW

更新日期：2005-05-01 00:00:00

abstract：:The Smith machine (SM) (vertical motion of bar on fixed path; fixed-form exercise) and free weights (FWs) (free-form path) are commonly used strength training modes. Exercisers may need to alternate between types of equipment, depending on testing, training, rehabilitation, and/or the exercisers' goals. The purposes o...

journal_title：Journal of strength and conditioning research

authors： Cotterman ML,Darby LA,Skelly WA

更新日期：2005-02-01 00:00:00

abstract：:Reliability, the consistency of a test or measurement, is frequently quantified in the movement sciences literature. A common metric is the intraclass correlation coefficient (ICC). In addition, the SEM, which can be calculated from the ICC, is also frequently reported in reliability studies. However, there are severa...

journal_title：Journal of strength and conditioning research

authors： Weir JP

更新日期：2005-02-01 00:00:00

abstract：:The purpose of this study was to compare percent body fat (%BF) estimated by air displacement plethysmography (ADP) and leg-to-leg bioelectrical impedance analysis (LBIA) with hydrostatic weighing (HW) in a group (n = 25) of NCAA Division III collegiate wrestlers. Body composition was assessed during the preseason wre...

journal_title：Journal of strength and conditioning research

authors： Dixon CB,Deitrick RW,Pierce JR,Cutrufello PT,Drapeau LL

更新日期：2005-02-01 00:00:00

abstract：:The aim of the present study was to investigate the effect of wearing a cooling jacket on thermoregulatory responses and endurance exercise performance in a warm environment. Nine untrained male subjects cycled for 60 minutes at 60% Vo(2)max (Ex1) and then immediately exercised to exhaustion at 80% Vo(2)max (Ex2) in 3...

journal_title：Journal of strength and conditioning research

authors： Hasegawa H,Takatori T,Komura T,Yamasaki M

更新日期：2005-02-01 00:00:00

abstract：:Previous research suggests high impact forces generated during landings contribute to noncontact anterior cruciate ligament (ACL) injuries. In women, neuromuscular differences appear to modify the ability to dissipate landing forces when compared to men. This study examined peak vertical impact forces (F(p)) and rate ...

journal_title：Journal of strength and conditioning research

authors： Irmischer BS,Harris C,Pfeiffer RP,DeBeliso MA,Adams KJ,Shea KG

更新日期：2004-11-01 00:00:00

abstract：:Strength augmentation has been demonstrated in resistance-trained men subsequent to 4 days of training abstinence. However, this phenomenon was exhibited in an unusual circumstance in which the exercise test (seated heel raise) primarily involved an isolated skeletal muscle (soleus) that is normally comprised almost e...

journal_title：Journal of strength and conditioning research

authors： Weiss LW,Wood LE,Fry AC,Kreider RB,Relyea GE,Bullen DB,Grindstaff PD

更新日期：2004-11-01 00:00:00

abstract：:Previous studies have suggested that short-term whole-body vibration (WBV) training produces neuromuscular improvement similar to that of power and strength training. However, it is yet to be determined whether short-term WBV exposure produces neurogenic enhancement for power, speed, and agility. The purpose of this s...

journal_title：Journal of strength and conditioning research

authors： Cochrane DJ,Legg SJ,Hooker MJ

更新日期：2004-11-01 00:00:00

abstract：:Anecdotal evidence suggests the widespread usage of anabolic steroids among athletes (20-90%), particularly at the professional and elite amateur levels. In contrast, scientific studies indicate that usage is rare and no higher than 6%. Conclusions from scientific studies suggest that anabolic steroid usage declines p...

journal_title：Journal of strength and conditioning research

authors： Berning JM,Adams KJ,Stamford BA

更新日期：2004-11-01 00:00:00

abstract：:The relationships between local muscular endurance and kinematic changes during a run to exhaustion at vVo2max. J Strength Cond. Res. 18(4):000-000. 2004.-A recent study suggested that runners who maintain a stable running style are able to run for longer at vVo2max velocity (vVo2max). This may be because of the capac...

journal_title：Journal of strength and conditioning research

authors： Hayes PR,Bowen SJ,Davies EJ

更新日期：2004-11-01 00:00:00

abstract：:Stretching prior to vigorous physical activity has been shown to decrease high-force muscular performance, but little is known about the effect of stretching on speed and accuracy movements. Serving percentage and radar measurements of ball speed were studied to examine the acute effect of stretching on tennis serve p...

journal_title：Journal of strength and conditioning research

authors： Knudson DV,Noffal GJ,Bahamonde RE,Bauer JA,Blackwell JR

更新日期：2004-08-01 00:00:00