EXPH 365 1stEdition Lecture 4ATP PCR- Stair sprinting- Vertical jump- 40 yard dash- MK power test- if get faster—ATP system improved Glycolytic system- Longer than 10-12 seconds- Work up to 3 min- Ketch test (cycling)o 40s sprint on a bike- Wingateo 30s against 0.075 of bodyweight resistanceo Peak power (watts) (strength/power output)o Avg powerAnaerobic Fatigue- %Decline from peak to end of test- Anaerobic capacityo Total work accomplished over 30s - Anaerobic athlete produce higher than aerobic o Gideon Massey (2100 watts) Olympic track cycling team- Avg college student 544 wattsAerobic System- Oxygen consumptiono Amount of molecular oxygen used during metabolismo Limited by how much oxygen is presento Removing lactate gives longer activity- VO2 max is max amount of oxygen body can transport in one minute- Oxygen uptake during the first few minutes of exercise- 4-6 minutes plateau (steady state/rate exercise)- No accumulation of blood lactate because oxygen meets demands- Uses just enough oxygen to keep up rateOxygen deficit - Brief period when oxygen needed for ATP but not available yet between rest and activity- The curve before plateau- Fast glycolysis works until oxygen can meet demandso Then it slows down but is still workingMaximal oxygen uptake - VO2 maxo Greatest amount of oxygen can consume, transport, and utilizeo Power=work/timeo More work in same time Run faster longero Absolute VO2= L x min -1o Relative VO2= mL x kg (body weight)/min Bench press example Relative compare two people To track progress use absolute VO2Measure VO2 Max- Direct- take air sampleso Take one minute air sample at peak in Douglas bag o Analyze air for oxygen- Indirect is mathematicalComputer basedAssess change in oxygen and carbon