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Phys3 Acute exercise

Is ATP regeneration a fast process? NO, slow process.
What is used to Regenerate ATP-PC system? Dietary nutrients. **Slow process.
Name the 2 basic reasons energy production through the ATP-PC system cannot be sustained for more than several seconds 1.Limited energy stores. 2.Rate of energy production required is too great. **Once ATP stores are depleted, we are dropping 20% in maximal power.
Does a pre-game meal matter to an athlete that is only maximally performing for a few seconds at a time? NO, b/c they will be relying on the ATP-PC system which will continulously be regenerated during the time they are resting.
Why is lactic acid more favorable than pyruvate in an anaerobic situation? B/c we can still generate ATP from lactate since it can be reconverted to starting material for glycolysis.
What energy system would you use when hitting a baseball? ATP stores. **1-2sec exercise time of very high intensity
What energy system would you use during a tennis rally? PC Stores. **10-15sec exercise time of very high intensity.
What energy system would you use during a 400M sprint? Rpaid glycolysis. **30-60sec exercise time of high intensity.
What energy system would you use during a marathon? Slow glycolysis. **90-120min exercise time of moderate intensity.
What is a bigger factor in fatigue: dehydration or glycogen depletion? DEHYDRATION
What is actually happening when an athelete "hits the wall" during exercise? Depletion of glycogen stores.
What energy system would you use during the Tour de France? Fat oxidation. **350hr of exercise time at low intensity
What energy system has the fastest rate/maximal power but the smallest store available? ATP stores
What energy system has the lowest reate/maximal power but the largest store available? Fat oxidation
What systems predominate at rest? 1.Slow glycolysis, 2.Fat oxidation. **burning 50% carbs and 50% fat. ALL aerobic!! ATP-PC system is dormant.
What systems predominate at very intense exercise? 1.ATP-PC. 2.Rapid glycolysis (once ATP-PC is depleted)
What systems predominate at moderate intensity exercise? 1.Rapid glycolysis (mainly). **ATP-PC is depleted and slow glycolysis cant quite keep up
What systems predominate at low to moderate intensity exercise? 1.Slow glycolsis. 2.Fat oxidation. **Rapid glycolysis and ATP-PC are exhausted.
How are these systems organized in terms of exercise intensity and exercise duration. intensity and duration are inversely proportional so the higher intensity system, the shorter it lasts.
Which energy systems are short-term, closed, self-contained systems? 1.ATP-PC. 2.Rapid glycolysis.
Which energy systems are long-term, open systems requiring communication b/w muscle and body? 1.Slow glycolysis. 2.fat oxidation.
Which energy system relys on 1 carbon sources? 3 carbon sources? 1 carbon: 1.ATP-PC. 2.Rapid Glycolysis. 3 carbon: 1.slow glycolysis. 2.fat oxidation.
Contributing factors to fatigue 1.ATP depletion (suppliments ineffective). 2.PC depletion (suppliments could help). 3.Lactic Acid accumulation (Aerobic warm up helps). 4.Glycogen depletion (high carb diet helps). 5.Dehydration. **4 & 5 are both slow glycolysis effects.
What is the rate of fluid absroption? 8oz per 15-20min.
What can delay all causes of fatigue? Specificity of training.
What is a MET? 1 metabolic: resting metabolic rate. seen in VO2. **4METS is exercising at 4X resting metabolic rate
Dynamic (aerobic) Vs. Static (resistance) exercise: HR 1.Dynamic:200bpm, 2.Static:160-180bpm.
Dynamic (aerobic) Vs. Static (resistance) exercise: BP 1.Dynamic:200/90, 2.Static:225-350/140-250.
Dynamic (aerobic) Vs. Static (resistance) exercise: VO2 1.Dynamic:20+METS, 2.Static:2METS.
Dynamic (aerobic) Vs. Static (resistance) exercise: CO 1.Dynamic:25L/min, 2.Static:10L/min
Dynamic (aerobic) Vs. Static (resistance) exercise: Respirations 1.Dynamic:50-60/min, 2.Static:20/min
Do you get a specific training effect with static exercise? NO, get a response but no training effect. **has nothing to do with aerobic conditioning and O2 consumption
What are the 4 main components of the Exercise Bout? 1.Warm up (turns on ALL energy systems). 2.Stretching. 3.Conditioning (sports participation). 4.Cool down (HR & BP recovery, removal of waste).
When is the BEST time to stretch? when the muscles are WARM!
What does VO2 measure? VO2max? 1.VO2:amt of O2 consumed by the tissues during any level of aerobic metabolism. 2.VO2max: maximal amt of O2 consumed during exercise by the tissues.
4 Components of exercise Rx? 1.Frequency. 2.Intensity. 3.Time/duration. 4.Type/mode.
What does the RPE scale range from? 6-20. based on % of VO2max.
What is the most important exercise consideration amoungst the elderly? Maintain functional capacity. **Also reduces risks and adds social aspects.
As a clinician, what is an important about exercise consideration with children? 1.Stop parents/coaches from pressuring kids to compete. 2.Kids should compete based on biological age.
Can pregnant women still exercise? Yes, they need to shorten their duration and be more aware of BL glucose levels
Order of Physical activity pyramid (from bottom to top) 1.ADLs. 2.Developing inefficiencies. 3.Recreational activities. 4.Aerobic exercise.
Order of muscular strength pyramid (from bottomw to top) 1.ROM exercises. 2.Flex exercise/resistance exercise. 3.Strengthening specific muscles. 4.Integrated strength training.
Do kids dissapate heat as well as adults? NO
Created by: WeeG



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