Read by QxMD icon Read

Heart rate deflection point

Urtats Etxegarai, Ainhoa Insunza, Jon Larruskain, Jordan Santos-Concejero, Susana M Gil, Eva Portillo, Jon Irazusta
We investigated whether heart rate (HR)-derived parameters are accurate performance predictors in endurance recreational runners. One hundred thirty recreational athletes completed an incremental running test (4´running + 1´rest). After each stage, we recorded HR, % of maximum HR (%HRmax), and blood lactate. We also assessed HR after each recovery period, and calculated lactate and HR recovery thresholds and HR deflection point. We tested these parameters for associations with running performance, as measured by peak treadmill speed (PTS) and personal best International Association of Athletics Federations (IAAF) score...
February 23, 2018: Journal of Sports Sciences
Dawn Scott, Ric Lovell
This study examined the utility of a range of approaches used to develop player-dependent speed zones in time-motion analysis (TMA), in determining the dose-response (internal load) of daily football training. Daily external (10 Hz GPS) and internal load (heart rate metrics, ratings of perceived exertion [RPE], wellness ratings) measures were tracked for 22 International women's football players during a 21-day training camp. High-speed (HSR) and very high speed running (VHSR) were determined according to arbitrary speed thresholds, as well as using a range of different individualization approaches that included the velocities corresponding to the heart rate deflection point, maximal aerobic speed, YYIR1 performance, and maximal sprint speed (MSS)...
November 3, 2017: Journal of Sports Sciences
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
Kayla M Baker, David H Fukuda, David D Church, Michael B LA Monica, Kyle S Beyer, Jay R Hoffman, Jeffrey R Stout
Heart rate deflection point (HRDP) can be determined through different mathematical-modeling procedures, such as bi-segmental linear regression (2SEG) or maximal distance model (Dmax). The purpose was to compare heart rate (HR) and oxygen consumption (VO2) at HRDP when using 2SEG and Dmax, and to examine their relationships with respiratory compensation point (RCP) and running performance. Nineteen participants completed a graded exercise test (GXT), to determine HRDP and RCP, and a 5km treadmill time trial (5Ktime)...
2017: International Journal of Exercise Science
Norin Chai, Jean Louis Pouchelon, Jonathan Bouvard, Leonor Camacho Sillero, Minh Huynh, Vincent Segalini, Lisa Point, Veronica Croce, Goulven Rigaux, Jack Highwood, Valérie Chetboul
Electrocardiography represents a relevant diagnostic tool for detecting cardiac disease in animals. Elephants can present various congenital and acquired cardiovascular diseases. However, few electrophysiologic studies have been reported in captive elephants, mainly due to challenging technical difficulties in obtaining good-quality electrocardiogram (ECG) tracings, and no data are currently available for free-ranging Asian elephants (Elephas maximus). The purpose of this pilot prospective study was to evaluate the feasibility of using a simple method for recording ECG tracings in wild, apparently healthy, unsedated Asian elephants (n = 7) in the standing position...
March 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
E H Rudling, S Schlamowitz, C B Pipper, E Nilsson, M Höllmer, J L Willesen, M Berendt, M Fredholm, C H Gulløv, M Christiansen, J Koch
INTRODUCTION: To investigate the prevalence and amplitudes of the electrocardiographic J wave in the Petit Basset Griffon Vendéen compared to 10 other dog breeds. ANIMALS: Electrocardiograms from 206 healthy dogs representing 11 dog breeds were included in the study. Besides Petit Basset Griffon Vendéen (PBGV; n = 23) 10 other dog breeds were included. MATERIALS AND METHODS: An electrocardiogram ruler was used for measuring the amplitudes of the J waves...
March 2016: Journal of Veterinary Cardiology: the Official Journal of the European Society of Veterinary Cardiology
Rohollah Nikooie
The purpose of this study was to determine the validity of anaerobic threshold (AnT)-equivalent to the second turn point for lactate (LTP2)-estimation using the O2 pulse changes in highly trained endurance cyclists who do not show heart rate deflection point (HRDP) during incremental testing. Sixteen endurance cyclists (age, 24.8 ± 4.7 years) and fifteen active men (age, 24.8 ± 3.7 years) performed an incremental cycling test to exhaustion. Pulmonary oxygen uptake (V[Combining Dot Above]O2) and other hemodynamic variables, heart rate, and blood lactate concentration were measured continuously throughout the test...
2016: Journal of Strength and Conditioning Research
Stephanie S Pinto, Roxana M Brasil, Cristine L Alberton, Hector K Ferreira, Natália C Bagatini, Joaquin Calatayud, Juan C Colado
This study compared heart rate (HR), oxygen uptake (VO2), percentage of maximal HR (%HRmax), percentage of maximal VO2, and cadence (Cad) related to the anaerobic threshold (AT) during a water cycling maximal test between heart rate deflection point (HRDP) and ventilatory (VT) methods. In addition, the correlations between both methods were assessed for all variables. The test was performed by 27 men in a cycle ergometer in an aquatic environment. The protocol started at a Cad of 100 b · min(-1) for 3 minutes with subsequent increments of 15 b · min(-1) every 2 minutes until exhaustion...
February 2016: Journal of Strength and Conditioning Research
Paulo E DE Assis Pereira, Vitor K Piubelli Carrara, Gustavo Mello Rissato, João M Pereira Duarte, Ricardo L Fernandes Guerra, Paulo H Silva Marques DE Azevedo
BACKGROUND: The aim of this study was to investigate the use of the Heart Rate Deflection Point Test (HRDP) in the determination of the velocity at the Maximal Lactate Steady State (MLSS). METHODS: Fifteen untrained male participants took part in a 3000-m running performance on a 400-m track. The volunteers performed an incremental test for HRDP determination. The third test was constant velocity, which lasted around 30 minutes and was based around HRDP for MLSS determination...
May 2016: Journal of Sports Medicine and Physical Fitness
Lada Radin, Maja Belić, Nika Brkljača Bottegaro, Hrvoje Hrastić, Marin Torti, Vlatko Vučetić, Damir Stanin, Zoran Vrbanac
The aim of this study was to determine a heart rate deflection point (HRdp) in competitive agility dogs. Fourteen healthy border collies underwent progressive incremental treadmill exercise--modified Conconi test protocol. Heart rate was continuously recorded, and the HRdp was estimated using two methods: subjective and computer aided regression. Maximal heart rate (HRmax), achieved running speed at the anaerobic threshold and at the end of test were also determined. Statistical analysis showed a very high positive correlation between HRdp determined by two methods...
June 2015: Veterinary Research Communications
Thiago R Lopes, Alexandre A DE Almeida, Antonio C DA Silva, Bruno M Silva
BACKGROUND: The aim of this study was to compare the respiratory compensation point (RCP) and maximal aerobic velocity (vVO2max) measured in the laboratory, respectively, with the heart rate deflection point (HRDP) and the peak velocity (PV) determined in the Université of Montréal Track Test (UMTT). Beside, we investigated the relationship of these parameters with endurance performance. METHODS: Eighteen long distance runners randomly performed (in different days) two incremental exercise tests (laboratory and UMTT)...
May 2016: Journal of Sports Medicine and Physical Fitness
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"