Correlation of Vo2 Max and Obla 4.0mmol

HOW DO OBLA ESTIMATIONS CORRELATE WITH ACTUAL LACTATE READINGS.

ABSTRACT:

Several methods are used for estimating the anaerobic threshold (AT) during exercise. The aim of the present study was to compare AT values based on blood lactate measurements with those obtained from computerised calculations of two different respiratory gas indices that measure respiratory exchange ratio (RER). A healthy 41 year old medium to low active male performed a stepwise incremental test on a treadmill. Respiratory gases were measured continuously, and blood samples were drawn every fourth minute. AT was determined, based on 1. Blood lactate concentrations (OBLA) 2. Respiratory gas exchange using ventilatory equivalent (VE) and V-Slope. OBLA and respiratory gas exchange indices showed similar values for AT. The study demonstrates that RER based AT correlate well with the blood lactate-based AT determination. The RER method is non-invasive and simple to perform, and in the present study, seemed to be the best respiratory index for estimation of AT.

KEYWORDS: Anaerobic Threshold, OBLA,

Introduction

Discussion of cellular mechanisms associated with lactic acid formation and the accumulation of lactate in the blood have been debated by physiologists for many years. (Lamb et al, 2006) as cited (Bangsbo & Juel 2006)

It can be agreed that there is an intensity in exercise above which lactic acid will accumulate in the blood, and several tests have been developed to detect the intensity. However the various ways of detecting an intensity of exercise above which measurement of oxygen cannot account for all the energy use, provide disparate results. For this reason, it should be acknowledged that these methods provide only an estimate or an approximate of anaerobic threshold-AT

Concerning the term Anaerobic Threshold (AT) there is no consensus as to its essence, also it’s too complex, and for the purpose of this study need not be described. However assuming, the terms used to...