Abstract：
:To verify the metabolic responses of oxygen consumption (V[Combining Dot Above]O2), heart rate (HR), blood lactate concentrations [La], and rate of perceived exertion (RPE) when swimming at an intensity corresponding to the critical velocity (CV) assessed by a 4-parameter model (CV4par), and to check the reliability when using only a single 400-m maximal front crawl bout (T400) for CV4par assessment in age-group swimmers. Ten age-group swimmers (14-16 years old) performed 50-, 100-, 200-, 400- (T400), 800-, and 1,500-m maximal front crawl bouts to calculate CV4par. V[Combining Dot Above]O2, HR, [La], and RPE were measured immediately after bouts. Swimmers then performed 3 × 10-minute front crawl (45 seconds rest) at CV4par. V[Combining Dot Above]O2, HR, [La], and RPE were measured after 10 minutes of rest (Rest), warm-up (Pre), each 10-minute repetition, and at the end of the test (Post). CV4par was 1.33 ± 0.08 m·s. V[Combining Dot Above]O2, HR, [La], and RPE were similar between first 10-minute and Post time points in the 3 × 10-minute protocol. CV4par was equivalent to 92 ± 2% of the mean swimming speed of T400 (v400) for these swimmers. CV4par calculated through a single T400 (92%v400) showed excellent agreement (r = 0.30; 95% CI: -0.04 to 0.05 m·s, p = 0.39), low coefficient of variation (2%), and root mean square error of 0.02 ± 0.01 m·s when plotted against CV4par assessed through a 4-parameter model. These results generated the equation CV4par = 0.92 × v400. A single T400 can be used reliably to estimate the CV4par typically derived with 6 efforts in age-group swimmers.
journal_name
J Strength Cond Resjournal_title
Journal of strength and conditioning researchauthors
Zacca R,Fernandes RJ,Pyne DB,Castro FAdoi
10.1519/JSC.0000000000001239subject
Has Abstractpub_date
2016-05-01 00:00:00pages
1365-72issue
5eissn
1064-8011issn
1533-4287journal_volume
30pub_type
杂志文章abstract：:The purpose of this study was to examine the influence of lower extremity muscular size and quality on stair-climb performance (SCP) in career firefighters. Forty-six male career firefighters (age = 37.0 ± 7.2 years; stature = 180.2 ± 6.9 cm; body mass = 108.0 ± 19.8 kg) volunteered for this study. Panoramic ultrasoun...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0000000000001268
更新日期：2016-06-01 00:00:00
abstract：:Coratella, G, Beato, M, Milanese, C, Longo, S, Limonta, E, Rampichini, S, Cè, E, Bisconti, AV, Schena, F, and Esposito, F. Specific adaptations in performance and muscle architecture after weighted jump-squat vs. body mass squat jump training in recreational soccer players. J Strength Cond Res 32(4): 921-929, 2018-The...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章,随机对照试验
doi：10.1519/JSC.0000000000002463
更新日期：2018-04-01 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
pub_type： 杂志文章
doi：10.1519/JSC.0b013e3181bac2ab
更新日期：2009-11-01 00:00:00
abstract：:Jastrzębska, M, Kaczmarczyk, M, and Jastrzębski, Z. Effect of vitamin D supplementation on training adaptation in well-trained soccer players. J Strength Cond Res 30(9): 2648-2655, 2016-There is growing body of evidence implying that vitamin D may be associated with athletic performance, however, studies examining the...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章,随机对照试验
doi：10.1519/JSC.0000000000001337
更新日期：2016-09-01 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
pub_type： 杂志文章,评审
doi：10.1519/R-14653.1
更新日期：2005-05-01 00:00:00
abstract：:Whole-body vibration is an emerging strategy used by athletes and exercising individuals to potentially accelerate muscle recovery. The vibration elicits involuntary muscle stretch reflex contractions leading to increased motor unit recruitment and synchronization of synergist muscles, which may lead to greater traini...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章,评审
doi：10.1519/JSC.0b013e318242a4d3
更新日期：2012-10-01 00:00:00
abstract：:High-intensity resistance training (HRT) has been recommended to offset age-related loss in muscle strength and mass. However, part of the elderly population is often unable to exercise at high intensities. Alternatively, low-intensity resistance training with blood flow restriction (LRT-BFR) has emerged. The purpose ...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章,随机对照试验
doi：10.1519/JSC.0000000000000703
更新日期：2015-04-01 00:00:00
abstract：:Osteoporosis is a chronic disease of major public health concern. Characterized by low bone mass and increasing risk for fracture, osteoporosis occurs to a greater extent in women. Resistance training is a mode of exercise that can be used to build peak bone mass during youth, thereby preventing osteoporosis later in ...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0b013e3181d09e9d
更新日期：2011-04-01 00:00:00
abstract：:The aim of the present study was to investigate the effect of playing position on strength, power, speed, and agility performances of women basketball players. Thirty subjects playing at national level participated in this study. They were divided into 3 groups according to playing position: guards (positions 1 and 2)...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0b013e3181b86a7e
更新日期：2009-10-01 00:00:00
abstract：:Kilit, B and Arslan, E. Effects of high-intensity interval training vs. on-court tennis training in young tennis players. J Strength Cond Res 33(1): 188-196, 2019-This study aimed to examine the effects of 6 weeks of high-intensity interval training (HIIT) vs. 6 weeks of on-court tennis training (OTT) on the psychophy...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0000000000002766
更新日期：2019-01-01 00:00:00
abstract：:Exercise or Swiss balls are increasingly being used with conventional resistance exercises. There is little evidence supporting the efficacy of this approach compared to traditional resistance training on a stable surface. Previous studies have shown that force output may be reduced with no change in muscle electromyo...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0b013e31815ef6b3
更新日期：2008-01-01 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
pub_type： 杂志文章
doi：10.1519/14433.1
更新日期：2005-02-01 00:00:00
abstract：:Training at the load that maximizes peak mechanical power (Pmax) is considered superior for the development of power. We aimed to identify the Pmax load ('optimal load') in the jump squat and to quantify small, moderate, large, and very large substantial differences in power output across a spectrum of loads to identi...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0b013e3182576feb
更新日期：2013-02-01 00:00:00
abstract：:According to the spring mass model, leg stiffness (characterized by the measure of kleg) behavior is theoretically dependent on lower limb joint and trunk stiffness. Yet, the influence of the trunk as a possible regulator of kleg is unknown. This study investigated the influence of abdominal training on kleg during ho...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0b013e318278f0c7
更新日期：2013-08-01 00:00:00
abstract：:Devlin, BL, Kingsley, M, Leveritt, MD, and Belski, R. Seasonal changes in soccer players' body composition and dietary intake practices. J Strength Cond Res 31(12): 3319-3326, 2017-The aims of this study were 2-fold: to determine seasonal changes in dietary intake and body composition in elite soccer players and to ev...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0000000000001751
更新日期：2017-12-01 00:00:00
abstract：:Periodization is known to improve training adaptations but the most effective periodization approach for muscular strength development for a wide variety of populations is yet to be determined. This systematic review and meta-analysis examined all studies directly comparing linear and undulating periodized resistance ...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章,meta分析,评审
doi：10.1519/JSC.0000000000000712
更新日期：2015-04-01 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
pub_type： 杂志文章
doi：10.1519/JSC.0b013e3181ce2423
更新日期：2010-04-01 00:00:00
abstract：:The purpose of this study was to determine the effects of varying intensities of exercise in normoxic and hypoxic environments on selected immune regulation and metabolic responses. Using a within-subjects design, subjects performed maximal tests on a cycle ergometer in both normoxic (PiO2 = 20.94%) and hypoxic (PiO2 ...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0b013e318181fdfd
更新日期：2008-09-01 00:00:00
abstract：:The use of elastic bands in resistance training has been reported to be effective in increasing performance-related parameters such as power, rate of force development (RFD), and velocity. The purpose of this study was to assess the following measures during the free-weight back squat exercise with and without elastic...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章,随机对照试验
doi：10.1519/JSC.0b013e3181db25de
更新日期：2010-11-01 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
pub_type： 杂志文章
doi：10.1519/JSC.0b013e3181cbaadd
更新日期：2010-02-01 00:00:00
abstract：:Müller, C and Zentgraf, K. Neck and trunk strength training to mitigate head acceleration in youth soccer players. J Strength Cond Res XX(X): 000-000, 2020-Heading in soccer involves repetitive head accelerations that may be detrimental for brain health. One way to mitigate adverse effects may be to increase head-neck...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0000000000003822
更新日期：2020-10-15 00:00:00
abstract：:The purpose of this study was to test whether a long duration of aerobic high-intensity interval training is more effective than shorter intervals at a higher intensity in highly trained endurance athletes. The sample comprised of 12 male and 9 female, national-level, junior cross-country skiers (age, 17.5 ± 0.4 years...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0b013e3182752f08
更新日期：2013-07-01 00:00:00
abstract：:Exergames may be useful for promoting physical activity in younger populations. Heart rate (HRs) responses and rating of perceived exertion (RPE) at self-selected intensities were compared in college-age participants during 2 modes of exergame activity vs. traditional exercise. Thirty-seven participants (men: 20, wome...
journal_title：Journal of strength and conditioning research
pub_type： 临床试验,杂志文章
doi：10.1519/JSC.0b013e3181e06f13
更新日期：2011-06-01 00:00:00
abstract：:Laudner, K, Wong, R, Latal, J, and Meister, K. Descriptive profile of lumbopelvic control in collegiate baseball pitchers. J Strength Cond Res 32(4): 1150-1154, 2018-Throwing a baseball requires the transmission of forces generated in the lower extremity, through the trunk, then to the upper extremity, and ultimately ...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0000000000001946
更新日期：2018-04-01 00:00:00
abstract：:The purpose of this study was to determine the relationship between squat loads and 2 bilateral and 2 unilateral stepping lower-body exercises in predominantly unilateral movement elite athletes (Karate). Equations to predict loads for lower-body exercises based on the squat load were also determined. Fourteen male el...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0b013e3181d65071
更新日期：2010-11-01 00:00:00
abstract：:Tomeleri, CM, Ribeiro, AS, Nunes, JP, Schoenfeld, BJ, Souza, MF, Schiavoni, D, Junior, PS, Cavaglieri, CR, Cunha, PM, Venturini, D, Barbosa, DS, and Cyrino, ES. Influence of resistance training exercise order on muscle strength, hypertrophy, and anabolic hormones in older women: a randomized controlled trial. J Streng...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0000000000003147
更新日期：2020-11-01 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
pub_type： 杂志文章,随机对照试验
doi：10.1519/JSC.0000000000000461
更新日期：2014-10-01 00:00:00
abstract：:Farinatti, P, Paes, L, Harris, EA, Lopes, GO, and Borges, JP. A simple model to identify risk of sarcopenia and physical disability in HIV-infected patients. J Strength Cond Res 31(9): 2542-2551, 2017-Early detection of sarcopenia might help preventing muscle loss and disability in HIV-infected patients. This study pr...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0000000000002070
更新日期：2017-09-01 00:00:00
abstract：ABSTRACT:Crommert, ME, Bjerkefors, A, Tarassova, O, and Ekblom, MM. Abdominal muscle activation during common modifications of the trunk curl-up exercise. J Strength Cond Res 35(2): 428-435, 2021-The purpose of this study was to investigate effects of common modifications of trunk curl-up exercise on the involvement of...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章
doi：10.1519/JSC.0000000000002439
更新日期：2021-02-01 00:00:00
abstract：:Weakley, JJS, Till, K, Read, DB, Phibbs, PJ, Roe, G, Darrall-Jones, J, and Jones, BL. The effects of superset configuration on kinetic, kinematic, and perceived exertion in the barbell bench press. J Strength Cond Res 34(1): 65-72, 2020-Training that is efficient and effective is of great importance to an athlete. One...
journal_title：Journal of strength and conditioning research
pub_type： 杂志文章,随机对照试验
doi：10.1519/JSC.0000000000002179
更新日期：2020-01-01 00:00:00
