VO 2 max: maximum volume of oxygen that can be taken in and used by the muscles per minute.Factors: Gender, Age, Lifestyle, Training, Body composition. Phyiological adaptations: ^max. cardiac output, ^stroke vol./ejection fraction/cardiac hypertrophy, ^HR range, less O being used for heart muscles, so more is available to other muscles, ^A-VO2 diff, ^blood vol. and haemoglobin/red blood cell/blood count, ^stores of glycogen and triglycerides, ^myoglobin (content of muscle), ^capillarisation (of muscle), ^number and size of mitochondria, ^concentrations of oxidative enzymes, ^lactate tolerance, reduced body fat, slow twitch hypertrophy.
OBLA (Onset of Blood Lactate Accumulation) Lactate is produced when H is removed from the lactic acid molecule. OBLA is when lactate rapidly accumulates in the blood. During intense exercise levels of lactic acid rise dramatically. OBLA gives indication of endurance capacity. Lactate threshold is the point at which OBLA occurs. Untrained person will work at about 50-60% of VO2 max whereas trained endurance performer can work at around 85-90% of VO2 max before OBLA occurs.
Comments
No comments have yet been made