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https://www.readbyqxmd.com/read/27890479/heart-rate-variability-and-psychometric-responses-to-overload-and-tapering-in-collegiate-sprint-swimmers
#1
Andrew A Flatt, Bjoern Hornikel, Michael R Esco
OBJECTIVES: The purpose of this study was to evaluate cardiac-parasympathetic and psychometric responses to competition preparation in collegiate sprint-swimmers. Additionally, we aimed to determine the relationship between average vagal activity and its daily fluctuation during each training phase. DESIGN: Observational. METHODS: Ten Division-1 collegiate sprint-swimmers performed heart rate variability recordings (i.e., log transformed root mean square of successive RR intervals, lnRMSSD) and completed a brief wellness questionnaire with a smartphone application daily after waking...
November 17, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27806008/impact-of-measured-vs-predicted-residual-lung-volume-on-body-fat-percentage-via-underwater-weighing-and-four-compartment-model
#2
Brett S Nickerson, Michael R Esco, Phillip A Bishop, Randall E Schumacker, Mark T Richardson, Michael V Fedewa, Jonathan E Wingo, Bailey A Welborn
The purpose of this study was to compare underwater weighing (UWW) and four-compartment (4C) model body fat percentage (BF%) for predicted vs. simultaneously measured residual lung volume (RLV). Forty-seven women and thirty-three men (age=22±5 years) had UWW and 4C model BF% determined using Boren et al. (RLVBOREN), Goldman and Becklake (RLVGB), and Miller et al. (RLVMILLER) RLV prediction equations. Criterion UWW BF% included body density (BD) values with simultaneous RLV. Criterion 4C model BF% included BD via UWW with simultaneous RLV, total body water via bioimpedance spectroscopy, and bone mineral content via dual energy x-ray absorptiometry...
October 27, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27803161/molecular-basis-for-cohesin-acetylation-by-establishment-of-sister-chromatid-cohesion-n-acetyltransferase-esco1
#3
Yadilette Rivera-Colón, Andrew Maguire, Glen P Liszczak, Adam S Olia, Ronen Marmorstein
Protein acetylation is a prevalent posttranslational modification that is regulated by diverse acetyltransferase enzymes. While histone acetyltransferases (HATs) have been well characterized both structurally and mechanistically, far less is known about non-histone acetyltransferase enzymes. The human ESCO1 and ESCO2 paralogs acetylate the cohesin complex subunit SMC3 to regulate the separation of sister chromatids during mitosis and meiosis. Missense mutations within the acetyltransferase domain of these proteins correlate with diseases, including endometrial cancers and Roberts Syndrome...
November 1, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27669193/validity-of-selected-bioimpedance-equations-for-estimating-body-composition-in-men-and-women-a-four-compartment-model-comparison
#4
Brett S Nickerson, Michael R Esco, Phillip A Bishop, Randall Schumacker, Mark Richardson, Michael V Fedewa, Jonathan E Wingo, Bailey A Welborn
The purpose of this study was to compare body fat percentage (BF%) and fat-free mass (FFM) values from bioelectrical impedance analysis (BIA) equations to values determined from a four-compartment (4C) model. Eighty-two adults (42 men and 40 women) volunteered to participate (age = 23 ± 5 years). BF% and FFM were estimated from previously developed BIA equations by Chumlea et al. (BIACH), Deurenberg et al. (BIADE), Kyle et al. (BIAKYLE), and Sun et al. (BIASUN). 4C model body composition was derived from underwater weighing for body density, dual energy X-ray absorptiometry for bone mineral content, and bioimpedance spectroscopy for total body water...
September 20, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27479076/super-resolution-imaging-of-live-bacteria-cells-using-a-genetically-directed-highly-photostable-fluoromodule
#5
Saumya Saurabh, Adam M Perez, Colin J Comerci, Lucy Shapiro, W E Moerner
The rapid development in fluorescence microscopy and imaging techniques has greatly benefited our understanding of the mechanisms governing cellular processes at the molecular level. In particular, super-resolution microscopy methods overcome the diffraction limit to observe nanoscale cellular structures with unprecedented detail, and single-molecule tracking provides precise dynamic information about the motions of labeled proteins and oligonucleotides. Enhanced photostability of fluorescent labels (i.e., maximum emitted photons before photobleaching) is a critical requirement for achieving the ultimate spatio-temporal resolution with either method...
August 24, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27362187/the-impact-of-coached-breathing-on-the-acute-recovery-of-anaerobic-performance-in-collegiate-female-athletes-3821-board-260-june-4-9-30-am-11-00-am
#6
Casey Metoyer, Ralph Graham, Michael Esco
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27361444/interpreting-individual-heart-rate-variability-responses-to-preseason-training-in-high-level-female-soccer-players-2808-board-331-june-3-11-00-am-12-30-pm
#7
Andrew A Flatt, Michael R Esco, Fabio Y Nakamura
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27360172/agreement-between-a-smartphone-pulse-sensor-and-electrocardiography-for-determining-hrv-in-three-different-positions-1029-board-345-june-1-2-00-pm-3-30-pm
#8
Michael R Esco, Andrew A Flatt, Bailey Welborn, Fabio Nakamura
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27360165/accuracy-of-a-heart-rate-monitor-based-exercise-test-for-estimating-aerobic-power-in-college-aged-individuals-1022-board-338-june-1-2-00-pm-3-30-pm
#9
Kimberly E Allen, Bailey Welborn, Michael R Esco
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27359880/the-acute-effect-of-foam-rolling-on-heart-rate-variability-737-board-53-june-1-3-30-pm-5-00-pm
#10
Thomas Kopec, Bailey Welborn, Andrew Flatt, Michael Esco
No abstract text is available yet for this article.
May 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27359209/agreement-between-a-smart-phone-pulse-sensor-application-and-ecg-for-determining-lnrmssd
#11
Michael R Esco, Andrew A Flatt, Fabio Y Nakamura
The purpose of this study was to determine the agreement between a smartphone pulse finger sensor (SPFS) and electrocardiography (ECG) for determining ultra-short-term heart rate variability (HRV) in three different positions. Thirty college-aged men (n = 15) and women (n = 15) volunteered to participate in this study. Sixty second heart rate measures were simultaneously taken with the SPFS and ECG in supine, seated and standing positions. lnRMSSD was calculated from the SPFS and ECG. The lnRMSSD values were 81...
June 27, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27243917/intra-and-inter-day-reliability-of-ultra-short-term-heart-rate-variability-in-rugby-union-players
#12
Fábio Y Nakamura, Lucas A Pereira, Michael R Esco, Andrew A Flatt, José E Moraes, Cesar C Cal Abad, Irineu Loturco
The aim of this study was to examine the intra-day and inter-day reliability of ultra-short-term vagal-related heart rate variability (HRV) in elite rugby union players. Forty players from the Brazilian National Rugby Team volunteered to participate in this study. The natural log of the root mean square of successive RR interval differences (lnRMSSD) assessments were performed on four different days. HRV was assessed twice (intra-day reliability) on the first day and once per day on the following three days (inter-day reliability)...
May 25, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27227794/individual-heart-rate-variability-responses-to-preseason-training-in-high-level-female-soccer-players
#13
Andrew A Flatt, Michael R Esco, Fabio Y Nakamura
The purpose of this study was to track changes in training load (TL) and recovery status indicators throughout a 2-week preseason and to interpret the meaning of these changes on an individual basis among 8 Division-1 female soccer players. Weekly averages for heart rate variability (lnRMSSD), TL and psychometrics were compared with effect sizes (ES) and magnitude based inferences. Relationships were determined with Pearson correlations. Group analysis showed a very likely moderate decrease for total training load (TTL) (TTL week 1 = 1203 ± 198, TTL week 2 = 977 ± 288; proportion = 1/2/97, ES = -0...
May 23, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27214584/monitoring-weekly-heart-rate-variability-in-futsal-players-during-the-preseason-the-importance-of-maintaining-high-vagal-activity
#14
Fabio Y Nakamura, Lucas A Pereira, Felipe N Rabelo, Andrew A Flatt, Michael R Esco, Maurizio Bertollo, Irineu Loturco
This study aimed to compare the weekly natural log of the root-mean-square difference of successive normal inter-beat (RR) intervals (ln RMSSDWeekly) and its coefficient of variation (ln RMSSDCV) in response to 5 weeks of preseason training in professional male futsal players. A secondary aim was to assess the relationship between ln RMSSDWeekly and ln RMSSDCV. The ln RMSSD is a measure of cardiac-vagal activity, and ln RMSSDCV represents the perturbations of cardiac autonomic homeostasis, which may be useful for assessing how athletes are coping with training...
May 23, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27191692/electromyographical-comparison-of-pike-variations-performed-with-and-without-instability-devices
#15
Ronald L Snarr, Ashleigh V Hallmark, Brett S Nickerson, Michael R Esco
Snarr, RL, Hallmark, AV, Nickerson, BS, and Esco, MR. Electromyographical comparison of pike variations performed with and without instability devices. J Strength Cond Res 30(12): 3436-3442, 2016-Instability devices are primarily used with the intent of increasing the intensity of traditional exercises by providing further muscular demands of the abdominal wall by decreasing stability. Although there are multiple studies examining these devices, most often they only compare one such device to a stable movement and overlook the comparison among multiple devices...
December 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27148533/p38%C3%AE-and-p38%C3%AE-mitogen-activated-protein-kinases-mapks-new-stars-in-the-mapk-galaxy
#16
REVIEW
Alejandra Escós, Ana Risco, Dayanira Alsina-Beauchamp, Ana Cuenda
The protein kinases p38γ and p38δ belong to the p38 mitogen-activated protein kinase (MAPK) family. p38MAPK signaling controls many cellular processes and is one of the most conserved mechanisms in eukaryotes for the cellular response to environmental stress and inflammation. Although p38γ and p38δ are widely expressed, it is likely that they perform specific functions in different tissues. Their involvement in human pathologies such as inflammation-related diseases or cancer is starting to be uncovered...
2016: Frontiers in Cell and Developmental Biology
https://www.readbyqxmd.com/read/27042998/initial-weekly-hrv-response-is-related-to-the-prospective-change-in-vo2max-in-female-soccer-players
#17
M R Esco, A A Flatt, F Y Nakamura
The aim of this study was to determine whether the early response in weekly measures of HRV, when derived from a smartphone application, were related to the eventual change in VO2max following an off-season training program in female soccer athletes. 9 female collegiate soccer players participated in an 11-week off-season conditioning program. In the week immediately before and after the training program, each participant performed a test on a treadmill to determine maximal oxygen consumption (VO2max). Daily measures of the log-transformed root mean square of successive R-R intervals (lnRMSSD) were performed by the participants throughout week 1 and week 3 of the conditioning program...
June 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/26997322/interpreting-daily-heart-rate-variability-changes-in-collegiate-female-soccer-players
#18
Andrew A Flatt, Michael R Esco, Fabio Y Nakamura, Daniel J Plews
BACKGROUND: Heart rate variability (HRV) is an objective physiological marker that may be useful for monitoring training status in athletes. However, research aiming to interpret daily HRV changes in female athletes is limited. The objectives of this study were (1) to assess daily HRV (i.e., log-transformed root mean square of successive R-R interval differences, lnRMSSD) trends both as a team and intra-individually in response to varying training load (TL) and (2) to determine relationships between lnRMSSD fluctuation (coefficient of variation, lnRMSSDcv) and psychometric and fitness parameters in collegiate female soccer players (n=10)...
March 11, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/26785502/agreement-of-bmi-based-equations-and-dxa-in-determining-body-fat-percentage-in-adults-with-down-syndrome
#19
Michael R Esco, Brett S Nickerson, Sara C Bicard, Angela R Russell, Phillip A Bishop
The purpose of this investigation was to evaluate measurements of body-fat percentage (BF%) in 4 body-mass-index- (BMI) -based equations and dual-energy X-ray absorptiometry (DXA) in individuals with Down syndrome (DS). Ten male and 10 female adults with DS volunteered for this study. Four regression equations for estimating BF% based on BMI previously developed by Deurenberg et al. (DE(BMI-BF%)), Gallagher et al. (GA(BMI-BF%)), Womersley & Durnin (WO(BMI-BF%)), and Jackson et al. (JA(BMI-BF%)) were compared with DXA...
January 2016: Adapted Physical Activity Quarterly: APAQ
https://www.readbyqxmd.com/read/26557192/acute-exercise-and-oxidative-stress-crossfit-%C3%A2-vs-treadmill-bout
#20
Brian Kliszczewicz, C John Quindry, L Daniel Blessing, D Gretchen Oliver, R Michael Esco, J Kyle Taylor
CrossFit(™), a popular high-intensity training modality, has been the subject of scrutiny, with concerns of elevated risk of injury and health. Despite these concerns empirical evidence regarding physiologic stresses including acute oxidative stress is lacking. Therefore, the purpose of this investigation was to examine the acute redox response to a CrossFit(™) bout. Furthermore, these findings were compared to a high-intensity treadmill bout as a point of reference. Ten males 26.4 ± 2.7 yrs having three or more months of CrossFit(™) experience participated in the present study...
September 29, 2015: Journal of Human Kinetics
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