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Heart rate variability, athlete

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https://www.readbyqxmd.com/read/28759538/validity-and-reliability-of-the-hexoskin%C3%A2-wearable-biometric-vest-during-maximal-aerobic-power-testing-in-elite-cyclists
#1
Catherine A Elliot, Michael J Hamlin, Catherine A Lizamore
The purpose of this study was to investigate the validity and reliability of the Hexoskin® vest for measuring respiration and heart rate (HR) in elite cyclists during a progressive test to exhaustion. Ten male elite cyclists (age 28.8 ± 12.5 yr, height 179.3 ± 6.0 cm, weight 73.2 ± 9.1 kg, V˙ O2max 60.7 ± 7.8 ml.kg.min mean ± SD) conducted a maximal aerobic cycle ergometer test using a ramped protocol (starting at 100W with 25W increments each min to failure) during two separate occasions over a 3-4 day period...
July 28, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28737589/validity-of-a-taekwondo-specific-test-to-measure-vo2peak-and-the-heart-rate-deflection-point
#2
Jader Sant'Ana, Emerson Franchini, Juan Murias, Fernando Diefenthaeler
This study investigated whether the progressive specific taekwondo test (PSTT) is a valid test to measure peak oxygen consumption (VO2PEAK) and the heart rate deflection point (HRDP) in taekwondo athletes. Eighteen male black belt athletes (25.3 ± 4.8 years; 8.2 ± 4.7 years of practice; 171.8 ± 4.7 cm; 76.1 ± 8.2 kg, and 13.1 ± 2.9% body fat) involved in regional and national level competitions performed the PSTT and an incremental treadmill test (IT). The following variables were analyzed: VO2PEAK, respiratory quotient, oxygen consumption at the HRDP (VO2HRDP), peak heart rate (HRPEAK), HRDP, and peak post-test blood lactate concentration...
July 19, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28730870/cardiac-autonomic-recovery-after-strength-exercise-in-lower-and-upper-limbs
#3
Naerton José Xavier Isidoro, Milana Drumond Ramos Santana, Vitor E Valenti, David M Garner, Luiz Carlos de Abreu
Introduction Strength exercises influence the cardiovascular system by promoting autonomic adjustments induced by the increased metabolic demand and consequent increase in local blood flow. However, it is unclear whether there are differences between upper and lower limbs. We aimedto evaluate recovery of cardiac autonomic modulation afterstrengthexercise in upper and lower limbs. Methods We analysed 29 healthy male subjects physically active but not professional athletes aged between 20 and 35 years old...
July 21, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28713463/cardiopulmonary-performance-during-maximal-exercise-in-soccer-players-with-alterations-in-renal-function
#4
Anderson Pontes Morales, Felipe Sampaio-Jorge, Luiz Felipe da Cruz Rangel, Jackson de Souza Menezes, Tiago Costa Leite, Beatriz Gonçalves Ribeiro
The aim of this study was to evaluate the curves of cardiorespiratory variables during cardiopulmonary exercise testing (CPET) in soccer players who had acute alterations in the glomerular filtration rate (GFR) after performing the pre-season training protocol. Sixteen male professional soccer players (25 ± 3 years; 179 ± 2 cm; and 77 ± 6 kg) were evaluated for oxygen uptake (VO2), heart rate (HR) and pulse relative oxygen (relative O2 Pulse) curves with intervals corresponding to 10% of the total duration of CPET...
June 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28712259/four-week-living-high-training-low-program-enhances-3000-m-and-5000-m-time-trials-by-improving-energy-metabolism-during-submaximal-exercise-in-athletes
#5
Hun-Young Park, Sungho Kim, Sang-Seok Nam
PURPOSE: This study aimed to determine the effect of a 4-week living high training low (LHTL) versus a living low training low (LLTL) program on energy metabolism during submaximal exercise and 3000-m and 5000-m time trial (TT) in athletes. METHODS: Male athletes (n = 20) were randomly assigned to the LLTL (n = 10, living at 1000 m and training at 700-1330 m) and LHTL (n = 10, living at simulated 3000 m and training at 700-1330 m) groups. We compared energy metabolisms during submaximal exercise on a treadmill and aerobic exercise performance (3000 m and 5000 m TT) before and after 4 weeks of training...
March 31, 2017: Journal of Exercise Nutrition & Biochemistry
https://www.readbyqxmd.com/read/28709155/variable-accuracy-of-wearable-heart-rate-monitors-during-aerobic-exercise
#6
Stephen Gillinov, Muhammad Etiwy, Robert Wang, Gordon Blackburn, Dermot Phelan, A Marc Gillinov, Penny Houghtaling, Hoda Javadikasgari, Milind Y Desai
PURPOSE: Athletes and members of the public increasingly rely on wearable HR monitors to guide physical activity and training. The accuracy of newer, optically based monitors is unconfirmed. We sought to assess the accuracy of five optically based HR monitors during various types of aerobic exercise. METHODS: Fifty healthy adult volunteers (mean ± SD age = 38 ± 12 yr, 54% female) completed exercise protocols on a treadmill, a stationary bicycle, and an elliptical trainer (±arm movement)...
August 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28682736/exercise-testing-reveals-everyday-physical-challenges-of-bariatric-surgery-candidates
#7
David B Creel, Leslie M Schuh, Robert L Newton, Joseph J Stote, Brenda M Cacucci
BACKGROUND: Few studies have quantified cardiorespiratory fitness among individuals seeking bariatric surgery. Treadmill testing allows researchers to determine exercise capacity through metabolic equivalents (METs). These findings can assist clinicians in understanding patients' capabilities to carry out various activities of daily living. The purpose of this study was to determine exercise tolerance, and the variables associated with fitness, among individuals seeking bariatric surgery...
July 6, 2017: Journal of Physical Activity & Health
https://www.readbyqxmd.com/read/28658076/recovery-time-profiling-after-short-middle-and-long-distance-swimming-performance
#8
Alessandro Piras, Matteo Cortesi, Francesco Campa, Monica Perazzolo, Giorgio Gatta
We investigated cardiac autonomic responses and hemodynamic parameters on recovery time following short-, middle- and long-swimming performance. Ten male regional-level swimmers were tested to estimate time and frequency domains of arterial baroreflex sensitivity and heart rate variability after 100-, 200-, and 400-m of front crawl. We found a BRS reduction for 90 min after a maximal 100- and 200-m front crawl event, meanwhile the reflex was restored back to the baseline value about 70 min after 400-m. The vagally mediated HF power of R-R intervals was significantly reduced for 30 min after 400-m, and more than 90 min after 100- and 200-m, with a concomitant increase of sympathetic modulation...
June 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28646812/oral-consumption-of-vitamin-k2-for-8-weeks-associated-with-increased-maximal-cardiac-output-during-exercise
#9
Brian K McFarlin, Andrea L Henning, Adam S Venable
Background • Vitamin K1 and K2 are not typically common in a Western diet because they are found in a variety of fermented foods. Vitamin K2 in particular has been demonstrated to restore mitochondrial function and has a key role in production of mitochondrial adenosine triphosphate. Thus, it is reasonable to speculate that dietary supplementation with vitamin K2 could increase the function of muscle with high mitochondrial content (ie, skeletal and cardiac muscle). Objective • The purpose of this study was to determine if 8 wk of dietary supplementation with Vitamin K2 could alter cardiovascular responses to a graded cycle ergometer test...
July 2017: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/28640770/physiological-responses-and-time-motion-analysis-of-small-combat-games-in-kickboxing-impact-of-ring-size-and-number-of-within-round-sparring-partners
#10
Ibrahim Ouergui, Nizar Houcine, Hamza Marzouki, Philip Davis, Emerson Franchini, Nabil Gmada, Ezzedine Bouhlel
Ouergui, I, Houcine, N, Marzouki, H, Davis, P, Franchini, E, Gmada, N, and Bouhlel, E. Physiological responses and time-motion analysis of small combat games in kickboxing: impact of ring size and number of within-round sparring partners. J Strength Cond Res 31(7): 1840-1846, 2017-The study aimed to investigate the physiological responses and time-structure of small combat games (SCGs) in kickboxing according to ring sizes and number of sparring partners. Twenty athletes from regional (n = 13) and national levels (n = 7) participated in the study (mean ± SD, age: 20...
July 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28630583/acute-modification-of-cardiac-autonomic-function-of-high-intensity-interval-training-in-collegiate-male-soccer-players-with-different-chronotype-a-cross-over-study
#11
Matteo Bonato, Luca Agnello, Letizia Galasso, Angela Montaruli, Eliana Roveda, Giampiero Merati, Antonio La Torre, Jacopo A Vitale
The purpose of this study was to evaluate if the time of the day (8.00 a.m. vs 8.00 p.m.) and chronotype could influence autonomic cardiac control in soccer players in relation to an acute session of high-intensity interval training. The morningness-eveningness questionnaire was administered to recruit Morning-type and Evening-type collegiate male soccer players. Therefore, 24 players (12 Morning-types and 12 Evening-types) were randomly assigned, to either morning (n = 12; age 23 ± 3 years; height 1.75 ± 0...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28630575/acute-and-post-exercise-physiological-responses-to-high-intensity-interval-training-in-endurance-and-sprint-athletes
#12
Lukas Cipryan, Gerhard Tschakert, Peter Hofmann
The purpose of the presented study was to compare acute and post-exercise differences in cardiorespiratory, metabolic, cardiac autonomic, inflammatory and muscle damage responses to high-intensity interval exercise (HIIT) between endurance and sprint athletes. The study group consisted of sixteen highly-trained males (age 22.1 ± 2.5 years) participating in endurance (n = 8) or sprint (n = 8) sporting events. All the participants underwent three exercise sessions: short HIIT (work interval duration 30s), long HIIT (3min) and constant load exercise (CE)...
June 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/28573597/effect-of-heart-rate-variability-biofeedback-on-sport-performance-a-systematic-review
#13
REVIEW
Sergio Jiménez Morgan, José Arturo Molina Mora
Aim is to determine if the training with heart rate variability biofeedback allows to improve performance in athletes of different disciplines. Methods such as database search on Web of Science, SpringerLink, EBSCO Academic Search Complete, SPORTDiscus, Pubmed/Medline, and PROQUEST Academic Research Library, as well as manual reference registration. The eligibility criteria were: (a) published scientific articles; (b) experimental studies, quasi-experimental, or case reports; (c) use of HRV BFB as main treatment; (d) sport performance as dependent variable; (e) studies published until October 2016; (f) studies published in English, Spanish, French or Portuguese...
June 1, 2017: Applied Psychophysiology and Biofeedback
https://www.readbyqxmd.com/read/28538325/heart-rate-variability-discriminates-competitive-levels-in-professional-soccer-players
#14
Riccardo Proietti, Selenia di Fronso, Lucas A Pereira, Laura Bortoli, Claudio Robazza, Fabio Y Nakamura, Maurizio Bertollo
Heart rate variability (HRV) has been increasingly used to monitor team sports athletes. Besides the traditional time domain indices (i.e., the SD of successive RR intervals [SDNN] and the root mean square difference of successive normal RR intervals [RMSSD]), recently the use of the stress score (SS), which is an inverse function of the SD2 index derived from the Poincaré plot, and the sympathetic/parasympathetic ratio (S/PS) to monitor soccer players has been proposed. However, the reliability of these new indices and the ability of HRV to differentiate between soccer competitive levels are unknown...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538315/evaluation-of-the-effectiveness-of-compression-garments-on-autonomic-nervous-system-recovery-after-exercise
#15
Alessandro Piras, Giorgio Gatta
The aim of this investigation was to evaluate the recovery pattern of a whole-body compression garment on hemodynamic parameters and on autonomic nervous system (ANS) activity after a swimming performance. Ten young male athletes were recruited and tested in 2 different days, with and without wearing the garment during the recovery phase. After a warm-up of 15 minutes, athletes were instructed to perform a maximal 400-m freestyle swimming event, and then time series of beat-to-beat intervals for heart rate variability (HRV), baroreflex sensitivity (BRS), and hemodynamic parameters were recorded for 90 minutes of recovery...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538304/a-performance-analysis-of-a-stand-up-paddle-board-marathon-race
#16
Ben L Schram, Wayne A Hing, Mike Climstein, James W Furness
Stand-up paddle boarding (SUP) is a rapidly growing sport and recreational activity in which little scientific research exists. A review of the literature failed to identify a single article pertaining to the physiological demands of SUP competition. The purpose of this study was to conduct a performance analysis of a national-level SUP marathon race. Ten elite SUP athletes (6 male and 4 female athletes) were recruited from the Stand Up Paddle Surfing Association of Australia to have their race performance in the Australian Titles analyzed...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538301/proposal-of-a-new-specific-cardiopulmonary-exercise-test-for-taekwondo-athletes
#17
Marcus P Araujo, Antônio C L Nóbrega, Gabriel Espinosa, Matheus R Hausen, Renata R T Castro, Pedro P Soares, Jonas L Gurgel
The objective of this study is to evaluate the cardiorespiratory variables of Taekwondo athletes while performing incremental exercise test on an ergometer using a ramp protocol and to propose a specific protocol for assessing these physiological variables during Taekwondo practice. Fourteen athletes participated in 2 incremental exercise tests: a treadmill exercise test (TREADtest) and a Taekwondo-specific exercise test (TKDtest). The TKDtest consists in 1-minute stages of kicks with an incremental load between then...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28535363/elite-status-maintained-a-12-year-physiological-and-performance-follow-up-of-two-olympic-champion-rowers
#18
Pavle Mikulic, Nikola Bralic
This case study reports the results of a 12-year (2005-2016) follow-up study of two Olympic champion rowers. The rowers were prospective athletes at the junior level when the study began, and we monitored their relevant physiological and performance data annually. Our findings indicated that their V̇O2max gradually increased up to about 22 years of age and leveled off at a value of approximately 7 l·min(-1) with minimal fluctuations thereafter. However, the variables that directly influence the V̇O2max changed...
May 23, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28513270/physiological-and-performance-measures-for-baseline-concussion-assessment
#19
Danielle M Dobney, Scott G Thomas, Tim Taha, Michelle Keightley
CONTEXT: Baseline testing is a common strategy for concussion assessment and management. Research continues to evaluate novel measures for potential to improve baseline testing methods. OBJECTIVES: The primary objective was to; 1) determine the feasibility of including physiological, neuromuscular and mood measures as part of baseline concussion testing protocol, 2) describe typical values in a varsity athlete sample, and 3) estimate the influence of concussion history on these baseline measures...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28507165/reliability-and-validity-of-an-agility-like-incremental-exercise-test-with-multidirectional-change-of-direction-movements-in-response-to-a-visual-stimulus
#20
Dennis-Peter Born, Philipp Kunz, Billy Sperlich
The aim of the study was to evaluate the reliability and validity of cardiorespiratory and metabolic variables, that is, peak oxygen uptake (V'O2peak) and heart rate (HRpeak), obtained from an agility-like incremental exercise test for team sport athletes. To investigate the test-retest reliability, 25 team sport athletes (age: 22 ± 3 years, body mass: 75 ± 7 kg, height: 182 ± 6 cm) performed an agility-like incremental exercise test on the SpeedCourt (SC) system incorporating multidirectional change-of-direction (COD) movements twice...
May 2017: Physiological Reports
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