Lecture 4 Notes: APK3110c- Applied Exercise Physiology
Lecture 4 Notes: APK3110c- Applied Exercise Physiology APK3110c
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This 5 page Class Notes was uploaded by Courtney Adams on Friday September 18, 2015. The Class Notes belongs to APK3110c at Florida State University taught by Dr. Robert Moffatt in Fall 2015. Since its upload, it has received 96 views.
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Date Created: 09/18/15
Exercise Physiology Lecture 4 Notes 9815 Oxygen Deficit 39 Work green Aerobic System o How much oxygen you need consume to do the work 0 As the exercise extends in time your begin to provide more and more energy 0 We use some combination of fats and carbs to get from point A to point B to support Aerobic energy production 39 Rest bottom red line 1 ATP PC anaerobic glycolysis 0 Always doing some kind of work even at rest 39 Deficit blue what you can t provide 0 There is a difference between what you need to do the work and what you can actually provide 0 We just cannot engage in the aerobic system fast enough to do this kind of work right away 0 NEVER will be able to provide all the energy aerobically 0 Will ALWAYS be in Deficit the difference between oxygen you can consume and the amount you actually consume Start accumulating lactate when we are in de cit 9 depends on the intensity of the exercise so lactate amount varies Long duration submaximal effort last for 60 min 9 suggest that the deficit may in fact disappear during that long submaximal effort 9 which also 7 wed suggests that you should be able to provide the bulk of your energy from L05 7M a m AEROBlC METABOLISM W Mm e a h we K w d Anaerobic amenm 1 f l l T ATPPC and CHO glycogen l w W liLA 175 mgdl V 0 L What energy system is bein used to get from rest red line to work top of green 9 Anaerobic Glycolysis l I ATTP PC Anaerobic Metabolism g I LL LHLL l L l Lactate will be produced when we REST 7 TI 739 39 il are in deficit The more intense the 39 7 l quot 39 7 quot 7 effort the more lactate we will 3 g o a D accumulate Tim min Always start out with ATP and work to provide energy to replace ATP 0 ATP can be formed by breaking down CP so it will release its energy to reform Pi ADP 9 ATP which then can be hydrolyzed in the muscle so it can continue to contract 9 provides a shift towards anaerobic glycolysis Exercise Physiology Lecture 4i Notes 9815 I If the event is a longer amount submaximal you will see a great dependence of aerobic metabolism 39 Starts with Anaerobic glycolysis 9 Aerobic Glycolysis 9 Glucose from Glycogen 9 Glucose from the blood 510 FA from the cell into the mitochondria 1530 min 0 All based upon the intensity of the effort I Too intense9 provides lactic acid VjiiLactic acid inhibits the mobilization of W 7 The demand providing Anaerobic Metabolism to the fullest as quickly as you can while the supply isn t able to do it o Steady State Rate Heart boat will stay the same through your event until you start to work harder or increase the intensity I Biochemically and physiology meeting your demand I You can supply your energetic needs anaerobically to meet your needs aerobically Will have a crossover in terms of energy system predominance and that takes a little bit of time 9 usually 24 minutes l 00 quotV Q You can typically achieve a steady state of condition from 264 min 9 Aerobic 90 or Anaerobic 2 8W9 0 ATPPC Anaerobic Glycolysis 5 39 3 lonirillui39lol39l The longer the effort the greater the contribution of aerobic metabolism 39 The longer the effert the less P 7 r 7 WJ 7 contribution of anaerobic o J 110 secs T m in n metabolism I a 7 77 39 or y D m l Amara bl c Glynn lycus Start to depend less and less on anaerobic metabolism and more A vbl and more on aerobic metabolism 00 GF WW 9 jouiTl 0 A T f ATPPQ f f Exercise Physiology Lecture 4 Notes 9815 Recovery Period Exercise 9 Rest what is the transition from exercise and returning back to rest 0 What is happening metabolically through exercise 0 increasing energy needs used muscle glycogen some depleted so will try to replace later 0 Depleted muscle glycogen 0 Created lactic acid created through anaerobic means 0 ATPPC is depleted NOT replaced while in exercise ONLY happens in recovery 39 Remember reason from recovery metabolically and physically o Physically when you stop exercising your heart rate and breathing was high but in recovery it starts to slow down 0 Oxygen Debt Amount of oxygen consumed during recovery excluding the amount of oxygen which would have been consumed at rest during that same time i B c we have gone from point A to point B bc we equated lactate and depleted fuels you have a debt to pay to replace it Debt in the form of excess oxygen being consumed during recovery 9 EPOC o EPOC Excess Post Oxygen Consumption I 2 components in respect to oxygen debt 1 How long does it take to recover to get back to baseline 39 The time of recovery timeplace it takes to get back to the baseline 2 How much oxygen you consume during that time Oxygen consumed during recovery excluding the amount of oxygen which would ve been consumed during rest during that same time 0 Recovery how much oxygen you consume over and above that resting metabolic time 139 Relationship between the de cit and the debt occurred because you weren t able to supply what you need immediately b c it took 24 minutes to do that 0 Debt will always be larger than the de cit What you borrow from the bank will always be a larger amount than what you borrowed o Deficit ALWAYS to the left of the oxygen curve increase lI ions 9 increase lactate 9 Decrease muscle glycogen 399 Decrease ATPPC Exercise 0x7 7 wt 1 Exercise Physiology glzuxxsuwr Lecture 4 Notes X l 98 15 l O Excess oxygen consumed during this time is all for the purpose of l algae Debt reconciling the deficit V0 2 jansumod f i am OUM39 9F Even though you take some time to cons umd 0 E l39 get back to the baseline the amount 9 e rc 53 of oxygen you consume dramatically drops so it could look like the other line 7 i 9 The curve of oxygen debt drops off so a t dramatically because it replenishes Exercise 0 ReCouery lie S quickly 7 Wquot l TimPCWnc l 39 DMMAT C DROP Concentrate on the red line Exercised for 395 min Depleted ATP P levels from 25 mv kg of muscle to about 5 mvkg 399 Not unusual 0 Can t replace ATP PC can only make more of it to be used again Cannot replace its stores until the exercise is over and you are in recovery 3 By 30 see you have replaced about 80 ofy our ATPPC at 60 sec you have replaced about 90 and beyond that you have just about all of it replaced I You restocked the shelves Replenished within a couple of minutes of recovery 39 This is why you can do a maximal lift rest for a couple of minutes and then come back and do a near maximal lift again 9 because you replaced it so quickly 25 l l l quot o x need 2 33ch 0 ATP blood How uaxygen lT P PC exercise WWW 30 W so 77 JD Exercise Physiology Lecture 4 Notes 9815 I What s the relationship between the rapidity which you replace ATP and the rate of decay or drop in this curve o What if we brought the same people in on a different day depleted their ATP PC levels again with the same type of exercise Except this time we put a blood pressure cuff and put it around their leg and inhibit blood ow in that region which means we cannot get oxygen into the muscle o Very distinct relationship between the oxygen needs and the replenishment of ATP Without oxygen we don t replace ATP rapidly But with it in addition to blood flow oxygen will be abundant and ATP will be very quickly replenished Slower line what s going on here that wasn t going on in the first 7 minutes of recovery 0 Replenishing glycogen stores 0 Taking lactate to convert it to glycogen via the KREBS cycle makes oxygen levels stay high for some time 39 Had people exercise at a very consistent amount of time and measured their muscle glycogen content before and after exercise 39 In one case they took the subjects depleted their muscle glycogen levels and then they measured how much lactate accumulated during exercise 9 1510 mg of lactate 39 They did it two different times under two different conditions a couple weeks apart both times depleting muscle glycogen levels the same amount and creating the same amount of lactate 0 One time they allowed the people to recovery with high carb diet 0 The other time they had a high fat high protein diet i As you can see the replenishment of muscle glycogen with the carbohydrate diet was clearly more effective in re lenishing muscle glycogen radioacth WED C W 7 W Go fl cl n e 1 04 HLA PYRUUATE abroad 39 liver L Glued a 1 f prawn it cm s a 7 a 7 C02 comes from the r r a a V a 7 Lac 5 ac 139 d a labeled lactate so it must Prentice u 12 1 To i maquot come from HLA to help Mawn5 7 i in i M WWW replenish the energy 0 7 N process am am nu m awesome
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