Abstract：
:The purpose of this study was to determine if three training loads equated by volume differed in terms of the temporal, kinematic and kinetic characteristics of each set. Twelve experienced weightlifters (30.2+/-10.6 years old and 75.8+/-13.0 kg) performed three sets (6 x 30% 1RM, 3 x 60% 1RM and 2 x 90% 1RM) of ballistic squats on an instrumented supine squat machine. Repeated measures ANOVA and Tukey HSD post hoc comparisons were used to distinguish significant differences between the three training loads on a variety of temporal, kinematic and kinetic variables. Significantly (p< 0.05) greater total time under tension during the eccentric (41-53%) and concentric phases (27-31%) was observed for the 30% 1RM condition compared to the other two conditions. Similarly, the lighter loading intensity resulted in significantly greater total eccentric (9-19%) and concentric (14-24%) force output compared to the other two conditions. Greater total power output was associated with the 30% 1RM condition for both the eccentric (25-48%) and concentric (40-69%) phases. Greater total work (9-24%) was also associated with the 30% 1RM condition. The 60% 1RM condition produced significantly greater total work, force and power compared to the 90% 1RM condition. However, greater concentric impulse (29-42%) was associated with the 90% 1RM condition. It is suggested that strength and power research needs to adopt a set kinematic and kinetic analysis approach within the research designs so that a better understanding of the nature of the neuromuscular adaptations elicited by different loading parameters is achieved.
journal_name
J Sci Med Sportjournal_title
Journal of science and medicine in sportauthors
Cronin J,Crewther Bdoi
10.1016/s1440-2440(04)80004-5keywords:
subject
Has Abstractpub_date
2004-06-01 00:00:00pages
144-55issue
2eissn
1440-2440issn
1878-1861pii
S1440-2440(04)80004-5journal_volume
7pub_type
临床试验,杂志文章abstract：:The purpose of this investigation was to examine the combined effects of hydration and exercise heat stress on choice reaction time. On three separate occasions eight male subjects performed cycle exercise at approximately 70% of peak power output in warm, humid conditions (31 degrees C, 63% relative humidity) for a m...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2006.03.006
更新日期：2006-05-01 00:00:00
abstract：OBJECTIVES:We evaluated the benefits and relationship of the number of steps per day to the cardiometabolic risk factors: adiposity indicators; insulin resistance; and metabolic syndrome (MetS) in apparently healthy Brazilian middle-aged men. DESIGN:Cross-sectional. METHODS:Apparently healthy men (age: 50 ± 5 years; ...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2013.04.017
更新日期：2014-05-01 00:00:00
abstract：OBJECTIVES:To determine the feasibility of a clinical trial that compares a 6-week, physiotherapist-guided gait retraining program with a foot orthoses intervention in runners with patellofemoral pain. DESIGN:Pilot randomised controlled trial. METHODS:Runners aged 18-40 years with clinically diagnosed patellofemoral ...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.jsams.2017.09.187
更新日期：2018-05-01 00:00:00
abstract：:The aim of the present study was to evaluate and compare the upper-body aerobic fitness characteristics in 2 groups of competitive surfers with different performance levels. Thirteen male competitive surfers performed an incremental dry-land board paddling test to determine specific peak oxygen uptake (VO2peak), peak ...
journal_title：Journal of science and medicine in sport
pub_type： 临床试验,杂志文章
doi：10.1016/s1440-2440(05)80023-4
更新日期：2005-03-01 00:00:00
abstract：:Our purpose was to assess the effect of wearing close-fitting neoprene shorts on swinging leg movement discrimination (MD) scores in elite level Australian Football players. Twenty players had their swinging leg MD assessed using the active movement extent discrimination apparatus (AMEDA), once wearing close-fitting n...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2007.03.007
更新日期：2008-06-01 00:00:00
abstract：:The benefit of job-related employment standards in physically demanding occupations are well known. A number of methodological frameworks have been established to guide the development of physical employment standards for single job functions. In the case of an organisation comprised of multiple and diverse employment...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章,评审
doi：10.1016/j.jsams.2018.02.008
更新日期：2018-11-01 00:00:00
abstract：OBJECTIVES:The health benefits from participation in half-marathon is challenged by a yearly running-related injury (RRI) incidence proportion exceeding 30%. Research in injury etiology is needed to successfully prevent injuries. The body's load capacity is believed to play an essential role for injury development. The...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2018.08.014
更新日期：2019-03-01 00:00:00
abstract：OBJECTIVES:The aim of this study was to investigate relationships between trait emotional intelligence and emotional state changes over the course of an ultra-endurance foot race covering a route of approximately 175 miles (282 km) and held in set stages over six days. DESIGN:A repeated measures field design that soug...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2011.03.001
更新日期：2011-07-01 00:00:00
abstract：OBJECTIVES:To compare catastrophic injury rates between the 14 South African Provincial Rugby Unions. DESIGN:A prospective, population-based study conducted among all South African Unions between 2008-2014. METHODS:Player numbers in each Union were obtained from South African Rugby's 2013 Census. Catastrophic injurie...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2017.01.232
更新日期：2017-07-01 00:00:00
abstract：:Prior electromyographic (EMG) analyses of the tennis serve have focused on the muscles in the hitting arm and shoulder region. This preliminary study aimed to examine the muscle activation patterns of selected lower trunk muscles during three different types of tennis serve--flat, topspin, and slice. Five male highly ...
journal_title：Journal of science and medicine in sport
pub_type： 临床试验,杂志文章
doi：10.1016/s1440-2440(03)80276-1
更新日期：2003-12-01 00:00:00
abstract：OBJECTIVES:To help clinicians understand the clinical relevance of subacromial bursa (SAB) thickness on ultrasound investigations in marathon swimmers. DESIGN:A prospective, observational cohort study. METHODS:Twenty two open-water marathon swimmers entered in a 19.7km open-water event received comprehensive, bilater...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2014.05.004
更新日期：2015-07-01 00:00:00
abstract：OBJECTIVES:To investigate changes in renal status from exercise in the heat with acclimatisation and to evaluate surrogates markers of Acute Kidney Injury. DESIGN:Prospective observational cohort study. METHODS:20 male volunteers performed 60 min standardised exercise in the heat, at baseline and on four subsequent o...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2019.04.010
更新日期：2019-09-01 00:00:00
abstract：:Despite frequent media accounts of drownings in the United Arab Emirates, little was known about the epidemiology and prevention of such incidents. The research objective was to assess newspapers as a national source on incidence, activities, and risk factors for drowning in this high-income media-rich developing coun...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2007.08.016
更新日期：2009-01-01 00:00:00
abstract：:The aim of this study was to examine the variability in physiological and perceptual responses and time-motion profiles of various small-sided soccer game (SSG) formats (2 versus 2, 4 versus 4 and 6 versus 6 players) and regimes (interval and continuous). Typical error (TE) was calculated for mean heart rate as a perc...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2007.07.006
更新日期：2008-09-01 00:00:00
abstract：:The purpose of this study was to assess the ability of observers to use voice-recognition analysis to accurately classify gait transitions and quantify gait durations typical of team games. Inter-rater and intra-rater reliability was also determined. Four males were filmed performing pre-determined gait protocols. eac...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/s1440-2440(02)80025-1
更新日期：2002-12-01 00:00:00
abstract：:The purpose of this study was to assess the validity and reliability of a Cosmed K4b2 portable telemetric gas analysis system. Twelve physically fit males performed a treadmill running session consisting of an easy 10 min run, a hard 3 min run and a 1 min sprint (with rest periods of 10 min separating each run), on fo...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/s1440-2440(04)80039-2
更新日期：2004-03-01 00:00:00
abstract：OBJECTIVES:To characterise foot strike and observe change in foot strike patterns with increasing distance during a 15km recreational running road race. To assess the impact of foot strike on running performance. DESIGN:Observational cross-sectional study. METHODS:Foot strike patterns were determined at the 3km and 1...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2019.12.018
更新日期：2020-06-01 00:00:00
abstract：OBJECTIVES:This study examined the contribution of sports participation to overall moderate-to-vigorous physical activity (MVPA) among adolescents, and explored potential moderators. DESIGN:Cross-sectional observational study using survey and accelerometry data drawn from the NEighbourhood Activity in Youth (NEArbY) s...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2019.06.009
更新日期：2019-10-01 00:00:00
abstract：UNLABELLED:Health benefits from children's independent mobility and active travel beyond school travel are largely unexplored. OBJECTIVES:This review synthesized the evidence for associations of independent mobility and active travel to various destinations with physical activity, sedentary behaviour and weight status...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章,评审
doi：10.1016/j.jsams.2012.11.001
更新日期：2013-07-01 00:00:00
abstract：:Injuries cause more morbidity among soldiers in the U.S. Army than any other health condition. Over two-thirds of U.S. soldiers' injuries occur gradually from cumulative micro-traumatic damage to the musculoskeletal system as a result of physical training activities. Paradoxically, the very physical training activitie...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2018.02.011
更新日期：2018-11-01 00:00:00
abstract：OBJECTIVES:Many adolescents are not physically active enough to receive associated health benefits. Furthermore, participation in physical activity generally declines during adolescence, and to a greater degree for females. Longitudinal research is required to better understand the determinants of change in physical ac...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2014.09.012
更新日期：2015-11-01 00:00:00
abstract：:The purpose of this study was to investigate the differences of momentum transfer from the trunk and upper extremities to the racket between open and square stances for different skill levels players in the two-handed backhand stroke. The motion capture system with twenty-one reflective markers attached on anatomic la...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2009.06.002
更新日期：2010-07-01 00:00:00
abstract：OBJECTIVES:To examine the efficacy of "slow" signs and patroller presence at "slow" signs to reduce speeds of snowsports participants, compared to a condition where no sign or patroller are present, independent of other factors that may contribute to skier slowing (such as prior knowledge, trail convergence, etc.). DE...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2020.12.008
更新日期：2020-12-31 00:00:00
abstract：OBJECTIVES:To compare the prevalence of injury sites between children and adults in alpine skiing and snowboarding. DESIGN:Retrospective comparative study. METHODS:The injuries occurring in 14 major Norwegian ski resorts were recorded by ski patrols the winter seasons 2010/2011 and 2011/2012. The injuries were relate...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2018.07.011
更新日期：2019-08-01 00:00:00
abstract：OBJECTIVES:To provide a systematic review of studies that investigated the effects of Active Break (AB) school-based interventions on Physical Activity (PA) levels, classroom behavior, cognitive functions, and academic performance in primary school children. DESIGN:Systematic review and meta-analysis. METHODS:Searche...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章,meta分析
doi：10.1016/j.jsams.2019.10.008
更新日期：2020-04-01 00:00:00
abstract：:Sports-related injuries are a significant health problem within Australia, and constitute a national health priority. There is limited Australian research data available on factors that contribute to triathlon injuries, and in particular on how training patterns relate to injury risk. This study examined the associati...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/s1440-2440(04)80262-7
更新日期：2004-12-01 00:00:00
abstract：OBJECTIVE:To reduce the number of transgressions to the rule, the occurrence of violent acts and to prevent injuries, Hockey Québec adopted the Fair-Play Program (FPP). The objective of the present study was to evaluate the effectiveness of the FPP. METHODS:52 Bantam (14-15 years) teams participated in this cohort stu...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/s1440-2440(05)80040-4
更新日期：2005-09-01 00:00:00
abstract：OBJECTIVES:To test the validity and intra-instrument reliability of the HJ-203 Omron pedometer when worn in different positions, under controlled and free-living conditions. DESIGN:Cross-sectional. METHODS:Forty healthy adults (20 men, 29.5±7.7 years) participated in three controlled tests, i.e. 20 step test, stair c...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2012.02.002
更新日期：2012-09-01 00:00:00
abstract：OBJECTIVES:Knee injury prevention programs (IPPs) reduce knee and anterior cruciate ligament (ACL) injury rates in female athletes, however, implementation of IPPs is low. The purpose of this study was to identify barriers to implementation of IPPs among collegiate women's soccer coaches. DESIGN:Cross-sectional survey...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2020.09.016
更新日期：2020-09-29 00:00:00
abstract：:This study examined the effects of active warm up on thermoregulatory responses and intermittent-sprint cycle performance in hot conditions (35.5+/-0.6 degrees C, RH 48.7+/-3.4%). Eight trained males performed a 36-min, intermittent-sprint test (IST) after no (WUP 0), 10-min (WUP 10) or 20-min warm up (WUP 20). The IS...
journal_title：Journal of science and medicine in sport
pub_type： 杂志文章
doi：10.1016/j.jsams.2007.05.013
更新日期：2009-01-01 00:00:00
