Abstract:
:Flatt, AA, Esco, MR, Allen, JR, Robinson, JB, Earley, RL, Fedewa, MV, Bragg, A, Keith, CM, and Wingo, JE. Heart rate variability and training load among National Collegiate Athletic Association Division 1 college football players throughout spring camp. J Strength Cond Res 32(11): 3127-3134, 2018-The purpose of this study was to determine whether recovery of cardiac-autonomic activity to baseline occurs between consecutive-day training sessions among positional groups of a collegiate football team during Spring camp. A secondary aim was to evaluate relationships between chronic (i.e., 4-week) heart rate variability (HRV) and training load parameters. Baseline HRV (lnRMSSD_BL) was compared with HRV after ∼20 hours of recovery before next-day training (lnRMSSDpost20) among positional groups composed of SKILL (n = 11), MID-SKILL (n = 9), and LINEMEN (n = 5) with a linear mixed model and effect sizes (ES). Pearson and partial correlations were used to quantify relationships between chronic mean and coefficient of variation (CV) of lnRMSSD (lnRMSSD_chronic and lnRMSSDcv, respectively) with the mean and CV of PlayerLoad (PL_chronic and PL_cv, respectively). A position × time interaction was observed for lnRMSSD (p = 0.01). lnRMSSD_BL was higher than lnRMSSDpost20 for LINEMEN (p < 0.01; ES = large), whereas differences for SKILL and MID-SKILL were not statistically different (p > 0.05). Players with greater body mass experienced larger reductions in lnRMSSD (r = -0.62, p < 0.01). Longitudinally, lnRMSSDcv was significantly related to body mass (r = 0.48) and PL_chronic (r = -0.60). After adjusting for body mass, lnRMSSDcv and PL_chronic remained significantly related (r = -0.43). The ∼20-hour recovery time between training sessions on consecutive days may not be adequate for restoration of cardiac-parasympathetic activity to baseline among LINEMEN. Players with a lower chronic training load throughout camp experienced greater fluctuation in lnRMSSD (i.e., lnRMSSDcv) and vice versa. Thus, a capacity for greater chronic workloads may be protective against perturbations in cardiac-autonomic homeostasis among American college football players.
journal_name
J Strength Cond Resjournal_title
Journal of strength and conditioning researchauthors
Flatt AA,Esco MR,Allen JR,Robinson JB,Earley RL,Fedewa MV,Bragg A,Keith CM,Wingo JEdoi
10.1519/JSC.0000000000002241subject
Has Abstractpub_date
2018-11-01 00:00:00pages
3127-3134issue
11eissn
1064-8011issn
1533-4287journal_volume
32pub_type
杂志文章abstract::Di Mascio, M, Ade, J, Musham, C, Girard, O, and Bradley, PS. Soccer-specific reactive repeated-sprint ability in elite youth soccer players: maturation trends and association with various physical performance tests. J Strength Cond Res 34(12): 3538-3545, 2020-Repeated-sprint ability is an important physical prerequisi...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000002362
更新日期:2020-12-01 00:00:00
abstract::This study investigated the effects of powerlifting gear on training volume and performance, defined by the squat, bench press, and deadlift. Eighteen powerlifters (18-26 years) were randomized into either a group that trained and competed using compressive gear (CG) or without the gear (NON). Training volume, volume ...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章,随机对照试验
doi:10.1519/JSC.0b013e3182510643
更新日期:2012-05-01 00:00:00
abstract::The goal for military basic training (BT) is to create a foundation for physical fitness and military skills of soldiers. Thereafter, more advanced military training can safely take place. Large differences in the initial physical performance of conscripts or recruits have led military units to develop more safe and e...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章,评审
doi:10.1519/JSC.0000000000001035
更新日期:2015-11-01 00:00:00
abstract::van Gogh, MJ, Wallace, LK, and Coutts, AJ. Positional demands and physical activity profiles of netball. J Strength Cond Res 34(5): 1422-1430, 2020-The aim of this study was to examine the activity profiles and physiological demands of netball. Eleven representative youth netball players participated in this study. Gl...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000002388
更新日期:2020-05-01 00:00:00
abstract::Longitudinal information requires the notion of repeated measurements throughout time. Such data is important because it allows the determination of the effectiveness of an intervention program. Research in competitive swimming has given special emphasis to energetics and biomechanics as determinant domains to improve...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章,评审
doi:10.1519/JSC.0b013e318257807f
更新日期:2012-07-01 00:00:00
abstract::Robles-Palazón, FJ, Ayala, F, Cejudo, A, De Ste Croix, M, Sainz de Baranda, P, and Santonja, F. Effects of age and maturation on lower extremity range of motion in male youth soccer players. J Strength Cond Res XX(X): 000-000, 2020-Restricted joint range of motion (ROM) has been considered as a primary risk factor for...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000003642
更新日期:2020-05-08 00:00:00
abstract::The purpose of this study was to document the physical profiles of players on the 2011 New York Giants (NYG) team and to make comparisons with the historical literature on previous National Football League (NFL) player profiles. In this study, height, body mass (BM), body fat percentage (BF%) using skinfold measuremen...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000000303
更新日期:2014-01-01 00:00:00
abstract::Keiner, M, Rähse, H, Wirth, K, Hartmann, H, Fries, K, and Haff, GG. Influence of maximal strength on in-water and dry-land performance in young water polo players. J Strength Cond Res 34(7): 1999-2005, 2020-Water polo is a multifaceted sport that is characterized by explosive actions, including sprint swimming, jumpin...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000002610
更新日期:2020-07-01 00:00:00
abstract::Akenhead, R, Harley, J, and Tweddle, S. Examining the external training load of an English Premier League football team with special reference to acceleration. J Strength Cond Res 30(9): 2424-2432, 2016-Practitioners and coaches often use external training load variables such as distance run and the number of high-spe...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000001343
更新日期:2016-09-01 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
pub_type: 杂志文章
doi:10.1519/00124278-200702000-00018
更新日期:2007-02-01 00:00:00
abstract::The purpose of this study was to evaluate the contribution of the 3 main energy pathways during a 30-second elliptical all-out test (EAT) compared with the Wingate all-out test (WAT). Participants were 12 male team sport players (age, 20.3 ± 1.8 years; body mass, 74.8 ± 12.4 kg; height, 176.0 ± 9.10 cm; body fat, 12.1...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0b013e3182a20f77
更新日期:2014-03-01 00:00:00
abstract::Single limb stance instability is a risk factor for lower extremity injuries. Therefore, the development of proprioception may play an important role in injury prevention. This investigation considered a professional basketball team for 6 years, integrating systematic proprioceptive activity in the training routine. T...
journal_title:Journal of strength and conditioning research
pub_type: 临床试验,杂志文章
doi:10.1519/JSC.0000000000001097
更新日期:2016-02-01 00:00:00
abstract::Spitz, RW, Wong, V, Bell, ZW, Viana, RB, Chatakondi, RN, Abe, T, and Loenneke, JP. Blood flow restricted exercise and discomfort: A Review. J Strength Cond Res XX(X): 000-000, 2020-Blood flow restriction exercise involves using a pneumatic cuff or elastic band to restrict arterial inflow into the muscle and block veno...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000003525
更新日期:2020-02-13 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
pub_type: 杂志文章
doi:10.1519/R-15624.1
更新日期:2006-02-01 00:00:00
abstract::There is a need to investigate the effect of specific movement strategies in reducing biomechanical risk factors for anterior cruciate ligament injury in young female athletes. The purpose of this study was (a) to determine the feasibility of implementing a novel movement strategy (Core-PAC) into a team warm-up before...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0b013e3182472fef
更新日期:2012-12-01 00:00:00
abstract::Del Monte, MJ, Opar, DA, Timmins, RG, Ross, JA, Keogh, JWL, and Lorenzen, C. Hamstring myoelectrical activity during three different kettlebell swing exercises. J Strength Cond Res 34(7): 1953-1958, 2020-Kettlebell exercises have become an increasingly popular form of resistance training and component of lower-body re...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000002254
更新日期:2020-07-01 00:00:00
abstract::Alves, RR, Viana, RB, Silva, MH, Guimarães, TC, Vieira, CA, Santos, DdAT, and Gentil, PRV. Postactivation potentiation improves performance in a resistance training session in trained men. J Strength Cond Res XX(X): 000-000, 2019-This study aims to analyze the influence of postactivation potentiation (PAP) on performa...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000003367
更新日期:2019-09-25 00:00:00
abstract::Beato, M, Madruga-Parera, M, Piqueras-Sanchiz, F, Moreno-Pérez, V, and Romero-Rodriguez, D. Acute effect of eccentric overload exercises on change of direction performance and lower-limb muscle contractile function. J Strength Cond Res XX(X): 000-000, 2019-This study aimed to evaluate the postactivation potentiation (...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000003359
更新日期:2019-09-02 00:00:00
abstract::Scanlan, AT, Wen, N, Pyne, DB, Stojanović, E, Milanović, Z, Conte, D, Vaquera, A, and Dalbo, VJ. Power-related determinants of Modified Agility T-test performance in male adolescent basketball players. J Strength Cond Res XX(X): 000-000, 2019-Although the Modified Agility T-test (MAT) has been advocated for assessing ...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000003131
更新日期:2019-03-18 00:00:00
abstract::Cuthbert, M, Thomas, C, Dos'Santos, T, and Jones, PA. Application of change of direction deficit to evaluate cutting ability. J Strength Cond Res 33(8): 2138-2144, 2019-The purpose of this study was to examine the application of the change of direction deficit (CODD) to a 90° cut test to examine whether CODD provides ...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000002346
更新日期:2019-08-01 00:00:00
abstract::Gago, P, Zoellner, A, Cezar, J, and Ekblom, MM. Post activation potentiation and concentric contraction performance: effects on rate of torque development, neuromuscular efficiency and tensile properties. J Strength Cond Res 34(6): 1600-1608, 2020-This study investigated how a 6-second maximal voluntary isometric cont...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000002427
更新日期:2020-06-01 00:00:00
abstract::Matos, F, Neves, EB, Rosa, C, Reis, VM, Saavedra, F, Silva, S, Tavares, F, and Vilaça-Alves, J. Effect of cold-water immersion on elbow flexors muscle thickness after resistance training. J Strength Cond Res 32(3): 756-763, 2018-Cold-water immersion (CWI) is commonly applied to speed up the recovery process after exer...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章,随机对照试验
doi:10.1519/JSC.0000000000002322
更新日期:2018-03-01 00:00:00
abstract::Recently, right and left output properties exerted from specific muscle groups have been evaluated using special measurement devices such as an isokinetic dynamometer. However, it remains unclear whether the coach can properly evaluate muscle function corresponding to lateral specificity in athletes. This study aimed ...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0b013e3181e38293
更新日期:2010-10-01 00:00:00
abstract::The aim of this study is to evaluate sprinting ability, density of acceleration, and speed dribbling ability of professional soccer players with respect to their positions.A total of 243 professional soccer players were examined. These soccer players are playing in different leagues of Turkey. The F-MARC test battery,...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0b013e318181fd90
更新日期:2008-09-01 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::This study investigates the performance effects of a 6-week biweekly anaerobic speed endurance production training among junior elite soccer players. Sixteen junior (age 16.9 ± 0.6 years) elite soccer players were tested in the Yo-Yo Intermittent Recovery test level 2 (IR2), 10-m and 35-m sprints, 7 × 35-m repeated-sp...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0b013e31827647bd
更新日期:2013-07-01 00:00:00
abstract::Strongman exercises consist of multi-joint movements that incorporate large muscle mass groups and impose a substantial amount of neuromuscular stress. The purpose of this study was to examine salivary testosterone responses from 2 novel strongman training (ST) protocols in comparison with an established hypertrophic ...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0b013e3182578115
更新日期:2013-03-01 00:00:00
abstract::Exercise has been promoted in an attempt to correct postural deviations, such as excessive lumbar lordosis, scoliosis, kyphosis, and abducted scapulae. One of the assumed causes of these conditions is a weak and lengthened agonist muscle group combined with a strong and tight antagonist muscle group. Strengthening and...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章,评审
doi:
更新日期:2001-08-01 00:00:00
abstract::Recent research suggests that humans have some ability to selectively activate or relax some muscles during isometric or dynamic muscle actions without changing posture or position. This study sought to reveal whether trained athletes could isolate either the pectoral or triceps muscles, respectively, at different int...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0b013e31823f8d11
更新日期:2012-09-01 00:00:00
abstract::Ribeiro, AS, Picoloto, A, Nunes, JP, Bezerra, ES, Schoenfeld, BJ, and Cyrino, ES. Effects of different resistance training loads on the muscle quality index in older women. J Strength Cond Res XX(X): 000-000, 2020-The purpose of this study was to investigate the effects of resistance training (RT) performed using low ...
journal_title:Journal of strength and conditioning research
pub_type: 杂志文章
doi:10.1519/JSC.0000000000003667
更新日期:2020-06-17 00:00:00