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4 edition of The objectivity and reproducibility of the lactate and ventilatory breakpoints found in the catalog.

The objectivity and reproducibility of the lactate and ventilatory breakpoints

The objectivity and reproducibility of the lactate and ventilatory breakpoints

  • 35 Want to read
  • 12 Currently reading

Published .
Written in English

    Subjects:
  • Physical fitness for men -- Testing,
  • Energy metabolism,
  • Lactic acid -- Metabolism,
  • Respiration

  • Edition Notes

    Statementby Paul Charles Di Vico.
    The Physical Object
    FormatMicroform
    Paginationix, 177 leaves
    Number of Pages177
    ID Numbers
    Open LibraryOL13598624M
    OCLC/WorldCa21880390

    The concept of Lactate threshold (LT) and ventilatory threshold (VT) have been broadly applied to evaluate endurance capacity during the sports training. The study aims to establish the link between lactate and a ventilatory threshold for workload, heartbeat, VO2 %max, VCO2, and VE. Energy Cost of Breathing The oxygen requirement of breathing remains relatively small at rest and during light-to-moderate exercise For exercise ventilations up to about L min-1, oxygen cost averages mL per liter of air breathed each minute, or 3 to 5% of the total oxygen consumption in moderate exercise and % for minute ventilations at V˙O2max.

    21 Dickhuth HH, Yin L, Niess A, Rocker K, Mayer F, Heitkamp HC, Horstmann T. Ventilatory, lactate derived and catecholamine thresholds during incremental treadmill running: Relationship and reproducibility. Int J Sports Med ; ; 22 Domínguez R, Garnacho-Castaño MV, Cited by: 1. No study has currently verified the agreement between breakpoints identified through HRV and LT 1 and LT 2, as no lactate measures were included in those previous studies (7, 8). In this regard, it should be highlighted that lactate thresholds (10 - 13) is considered as a gold standard method when predicting running aerobic by: 1.

      INTRODUCTION. The lactate threshold (LT) and the ventilatory threshold (VT)—determined by using respiratory measures—are the 2 most common submaximal measures of exercise tolerance. 1,2 LT and VT are generally considered to agree with each other, 1 but this remains controversial. 3 The purpose of the present study was to assess how closely VT and LT correspond to Cited by: 2.   Physiological variables, such as maximum work rate or maximal oxygen uptake (V̇O2max), together with other submaximal metabolic inflection points (e.g. the lactate threshold [LT], the onset of blood lactate accumulation and the pulmonary ventilation threshold [VT]), are regularly quantified by sports scientists during an incremental exercise test to by:


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The objectivity and reproducibility of the lactate and ventilatory breakpoints Download PDF EPUB FB2

Get this from a library. The objectivity and reproducibility of the lactate and ventilatory breakpoints. [Paul Charles Di Vico].

The purpose of this study was to determine, i) the reliability of blood lactate and ventilatory-based thresholds, ii) the lactate threshold that corresponds with each ventilatory threshold (VT1and VT2) and with maximal lactate steady state test (MLSS) as a proxy of cycling performance.

by:   To determine if blood lactate (LA) is the stimulus responsible for ‘breakaway’ ventilation (VE), the lactate (LT) and ventilation (VT) thresholds were monitored during one-legged cycling exercise. Ten healthy volunteer male subjects (Mean 2-legged $$\dot V_{O_{2\max } } $$ = lmin−1) performed prior exercise (PE) to reduce muscle glycogen stores by cycling at 75–85% of maximal Cited by: Children have been shown to have higher lactate (LaTh) and ventilatory (VeTh) thresholds than adults, which might be explained by lower levels of type-II motor-unit (MU) recruitment.

The anaerobic threshold is commonly measured by either blood lactate (lactate threshold) or ventilatory gases (ventilatory threshold); however, the relationship between these 2 methods is not conclusive.

The lactate threshold has been characterised at either a fixed or variable blood lactate concentration (BLa). Recent studies have indicated a specific blood lactate Cited by: methods for ventilatory threshold (VT) assessment include analysis of the respiratory ex-change ratio (RER) at the level of RER= (VTRER=), the breakpoint of the nonlinear increase of the ventilatory equivalent for oxygen (VTEqO2) and the VCO2 versus VO2 curve (VTV-slope) (Solberg et al., ; Wasserman et al., ).Cited by: 2.

that looked much like a blood-lactate profile already in Wildor Hollman, from the German University of Sport in Cologne, was almost certainly the first to display ventilatory and blood-lactate responses as a function of intensity and to identify a breakpoint, presenting his findings at an American congress in Unfortunately.

Lactate Threshold (LT) is a more recent and descriptive term for the lactate inflection point described above. Due to the misconception about lactate as the source of fatigue, it was thought that the workload just below lactate accumulation in the blood reflected a maximum sustainable level of performance (typically measured as a one hour time.

Normal aerobic and anaerobic exercise data for North American school-age children Reginald L. Washington, MD, Jeff C. van Gundy, MD, Craig Cohen, MD, Henry M.

Sondheimer, MD, and Robert R. Wolfe, MD From the Department of Pediatric Cardiology, The Children's Hospital, Denver, and the University of Colorado School of Medicine, Denver The purpose of this study was to establish Cited by: Metabolic and ventilatory responses to steady state exercise relative to lactate thresholds.

Eur J Appl Physiol Occup Physiol ; [ Links ] Yamamoto Y, Miyashita M, Hughson RL, Tamura S, Shinohara M, Mutoh Y. The ventilatory threshold gives maximal lactate steady state. Eur J Appl Physiol Occup Physiol ; The reproducibility of the assessment of ventilatory thresholds was investigated in two test‐retest experiments, one performed on a cycle ergometer with 21 moderately active male subjects and.

Ventilatory Breakpoints in Boys and Men VO 2 peak, with age has been reported in both boys and girls (29). Girandola et al. (13) tested prepubescent girls (11 years old), postpubescent girls. The former has been identified as that point when lactate concentration increases significantly above baseline, while the latter breakpoint represents a non-linear increase in blood lactate.

These authors associate VE/VO 2 with the first breakpoint and VE with the second breakpoint, which is in direct contrast to our results indicating no significant difference in VE and VE/VO 2 by:   AT was determined, based on 1) blood lactate concentrations (Lactate-AT), 2) respiratory exchange ratio (RER-AT), 3) V- slope method (Vslope-AT), and 4) ventilatory equivalent for VO 2 (EqO 2-AT).

Lactate-AT and RER-AT values showed similar values, both on treadmill and on cycle by: The Relationship Between Ventilatory and Lactate Thresholds in Boys and Men Article in Research in Sports Medicine 15(3) July with 58 Reads How we measure 'reads'.

THE EFFECTS OF TRAINING INTENSITY ON BLOOD LACTATE BREAKPOINTS IN RUNNERS by ARVYDAS STASIULIS*, ROMUTIS ANČLAUSKAS **, JAN JAŠČANIN *** The purpose of this study was to determine the effects of an eight week running endurance training program at two different intensities on both aerobic (AeT) and lactate turn point (LTP) Size: 88KB.

Comparison between anaerobic threshold determined by ventilatory variables and blood lactate response in cyclists Alexandre Hideki Okano1,2,4, Leandro Ricardo Altimari1,4, Herbert Gustavo Simões5, Antonio Carlos de Moraes1,4, Fábio Yuzo Nakamura 1,2,3, Edilson Serpeloni Cyrino and Roberto Carlos Burini6 ORIGINAL ARTICLE Keywords: Anaerobic.

In order to determine the ventilatory threshold (VT) and the lactate threshold (LT) in a reliable way, a new method is proposed and compared with conventional methods.

The new method consists of calculating the point that yields the maximal distance from a curve representing ventilatory and metabolic variables as a function of oxygen uptake (V̇O 2) to the line formed by the two end points. The Ventilatory Threshold: Quantitative Analysis of Reproducibility and Relation to Arterial Lactate Concentration in Normal Subjects and in Patients with Chronic Congestive Heart Failure Charles A.

Simonton, MD, Michael B. Higginbotham, MB, and Frederick R. Cobb, MD The present study evaluates optimal ventilatory criteria and exercise protocols for determining the ventilatory threshold, and Cited by: In healthy normal individuals (n = 69), coronary patients with myocardial ischaemia (n = 27) and patients with chronic heart failure (CHF, n = 33), four widely applied methods to determine ventilatory threshold (VT) were analysed: V-slope, ventilatory equivalent for O2 (EqO2), gas exchange ratio (R) and end-tidal partial pressure of oxygen.

Lactate threshold [LAT, log lactate vs log oxygen Cited by:. The break points are associated with a more rapid rise in the blood lactate concentration above the rest level (AeT or lactate threshold) and a very rapid rise of the lactate concentration in the.2.

a respiratory exchange ratio greater than and blood lactate greater than mM/L 3. a HR within beats of age-predicted max HR The following variables of ____ must be continuously measured and recorded throughout a CV fitness exercise test for the purpose of calculating the submax and max o2 consumption and other metabolic.This study examined the reproducibility of speed corresponding to specific lactate markers during incremental treadmill running of normal and prolonged stage durations.

Design Nineteen healthy participants (14 male, 5 female) performed repeated, incremental treadmill running trials of 4 and 8 min stages on separate days to examine the test–retest reproducibility of speed at lactate by: 6.