نتایج جستجو برای: eigen increment threshold

تعداد نتایج: 159021  

Journal: :Physiological research 2004
O Ozcelik H Kelestimur

Anaerobic threshold which describes the onset of systematic increase in blood lactate concentration is a widely used concept in clinical and sports medicine. A deflection point between heart rate-work rate has been introduced to determine the anaerobic threshold non-invasively. However, some researchers have consistently reported a heart rate deflection at higher work rates, while others have n...

Journal: :Preventive medicine 2004
Panteleimon Ekkekakis Eric E Hall Steven J Petruzzello

BACKGROUND The high rates of dropout from exercise programs may be attributed in part to the poor ability of most individuals to accurately self-monitor and self-regulate their exercise intensity. The point of transition from aerobic to anaerobic metabolism may be an appropriate level of exercise training intensity as it appears to be effective and safe for a variety of populations. Possible pr...

2016
Nathaniel T. Berry Laurie Wideman Edgar W. Shields Claudio L. Battaglini

Multisport events continue to grow in popularity among recreational, amateur, and professional athletes around the world. This study aimed to determine the compounding effects of the initial run and cycling legs of an International Triathlon Union (ITU) Duathlon simulation on maximal oxygen uptake (VO2max), ventilatory threshold (VT) and running economy (RE) within a thermoneutral, laboratory c...

Journal: :British journal of sports medicine 1988
M Haverty W L Kenney J L Hodgson

This study compared the oxygen uptake (VO2) and running velocity at which the lactate threshold (LT), the ventilatory threshold (VT), and the maximal lactate steady state (MSSLA), and the maximal VO2 steady state (MSSVO2) occurred in 11 trained male runners (mean age = 22.4 years, range 18-28 years). Each underwent an incremental treadmill test to exhaustion. The LT was defined by a systematic,...

2018
Marc-Daniel Ahrend Patrick Schneeweiss Peter Martus Andreas M Niess Inga Krauss

Objectives Traditional performance tests in mountain bike marathon (XCM) primarily quantify aerobic metabolism and may not describe the relevant capacities in XCM. We aimed to validate a comprehensive test protocol quantifying its intermittent demands. Methods Forty-nine athletes (38.8±9.1 years; 38 male; 11 female) performed a laboratory performance test, including an incremental test, to de...

2008
Tiancheng Lou Christophe Tartary

In a (r, n)-threshold secret sharing scheme, no group of (r − 1) colluding members can recover the secret value s. However, the number of colluders is likely to increase over time. In order to deal with this issue, one may also require to have the ability to increase the threshold value from r to r′(> r), such an increment is likely to happen several times. In this paper, we study the problem o...

Journal: :Vision Research 1996
FRANKLIN NAARENDORP KENT S RICE PAUL A SIEVING

We examined whether signals from rods and S cones can combine to produce a threshold response. Test flashes of specific wavelengths superposed on a long wavelength adapting field were used to isolate threshold responses from the two receptor systems, simultaneously and at the same retinal location. Dark adaptation experiments and spectral sensitivity determinations indicated that, in the adapta...

2017
Josué Gómez-Molina Ana Ogueta-Alday Jesus Camara Christoper Stickley José A. Rodríguez-Marroyo Juan García-López

The aims of this study were to establish and validate various predictive equations of half-marathon performance. Seventyeight half-marathon male runners participated in two different phases. Phase 1 (n = 48) was used to establish the equations for estimating half-marathon performance, and Phase 2 (n = 30) to validate these equations. Apart from half-marathon performance, training-related and an...

2011
Hugo AP Santana Sérgio R Moreira Willson B Neto Carla B Silva Marcelo M Sales Vanessa N Oliveira Ricardo Y Asano Foued S Espíndola Otávio T Nóbrega Carmen SG Campbell Herbert G Simões

BACKGROUND The absence of the I allele of the angiotensin converting enzyme (ACE) gene has been associated with higher levels of circulating ACE, lower nitric oxide (NO) release and hypertension. The purposes of this study were to analyze the post-exercise salivary nitrite (NO2-) and blood pressure (BP) responses to different exercise intensities in elderly women divided according to their ACE ...

Journal: :The Journal of the Acoustical Society of America 2003
Magdalena Wojtczak Gail S Donaldson Neal F Viemeister

Intensity difference limens (DLs) were measured in users of the Nucleus 22 and Clarion v1.2 cochlear implants and in normal-hearing listeners to better understand mechanisms of intensity discrimination in electric and acoustic hearing and to evaluate the possible role of neural adaptation. Intensity DLs were measured for three modes of presentation: gated (intensity increments gated synchronous...

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