Lecture 5 Notes: APK3110c- Applied Exercise Physiology
Lecture 5 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 106 views.
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Date Created: 09/18/15
unseat I muoglobm Exercise Physiology Lecture 5 Notes 91015 Biological Systems 0 You make these adaptions when you force the system to do something it is not used to doing9 effects energetics 0 Ex Lifting weights 9 see a result when you activate the system properly I You will get these biological changes that occur because you stimulated the system to do something that it is not accustomed to doing your overloading it and as a result it will have to adapt will adjust to it o Adaptation for strength conditions 9Muscles get largerstronger move more rapidly I Biochemically men are able to perform better run longer run farther lift more weights build their muscles so they can look good 0 But in order for you to advance in terms of improving strength and duration you have to chronically overload the system c ontinue to overload Biochemical adaptations relevant to the aerobic system to Myoglobin like hemoglobin an oxygen binding figure that is found in the muscle cell transporter of oxygen within the muscle cell can also store oxygen 9 Stores and transports oxygen to the mitochondria o if we have more myoglobin then we Will have more oxygen picked up and transported to mitochondria to make more oxygen available for aerobic metabolism I Aerobic capacity increases VOZ consumed you will be able to consume greater amounts of oxygen at maximal levels 0 More myoglobin more oxygen picked up more transferred to the mitochondria more available for aerobic metabolism 39 If you consume more myoglobin you can make more oxygen available for the production of energy 9 more energy you can run longer or faster M o lobin vs 39ll rainin Cross transference of trainln c Took males and females trained them for 10 weeks and plotted muscle myoglobin in the blood two different times Protraining and Posttraining Found that it dramatically increased 0 Biological adaptation to aerobic training improvement to the musclemyoglobin content o More myoglobin more storage more transport more oxygen consumption more energy produced aerobically I TWIST Trained only using their dominant leg nonadominant leg 2 served as a control a Even though it s the same individual same body same set of legs there was no crossover from J 7 V I i training r7 N 39 p o if you train the muscle to improve them 9 PM P0 increase myoglobin 9 no crossovers have Ev a I f I l h quotV m 1 to train BOTH legs all the muscles involved NH I UWWIUTIG Eize Exercise Physiology Lecture 5 Notes 91015 Cross transference of trainin 1 0 CH0 Oxidation what can we do training wise to increase the capacity of skeletal muscle to oxidize glycogen through CHO water and energy from a biochemical standpoint o Stimulate the enzymes involved by vulture of training forces systemto increase the energy via the Glycolysis Krebs mitochondriaav by forcing the system to chronically produce energy r it will adapt and adjust Ii lf you force the enzymes to do more you will start to see the activity and concentration of the enzymes increase i Increase the enzymes involved in the reaction more enzymes more reactions More mitochondria GRAPH 1 I This is where we generate energy 391 Have to specifically train the muscle I There is a physiological hiochemical rational for mitochondria but quotif you don t use it you will loose it improve the size of the glycogen stores by carb loading depleting and then carb loading GRAPH 2 i Biological adaption with regards to CHO stores through aerobic training 9Glycogen S y nthase NOT INCLUDED BECAUSE PHYSIOLOGICAL but the same concept you could also lncrease the capillary density i Trained the muscle start with X amount of capillaries and end up with 2X that amount of capillaries I Improve the number of capillaries E have a greater ability to bring in more oxygen 3 0 Comparing pre post workout 2 The size and the number of the mitochondria increases from pre to post 5 g I You could see these changes relatively quickly 3 But you have to specifically train the muscle Fxgroisc C or I am Exercise Physiology Lecture Notes 91015 QRAEHLB i Compared the pre and post training for a long i term study by pedaling on a bicycle 639 0 Muscle glycogen stores in the human skeletal muscle 1315 g kg of muscle In Exercise conditioning by itself can vastly 0 increase glycogen stores g I How does this happen o Enzyme Glycogen Synthase 2 training lgg M increases the intensity and 7 I 77 concentration of this enzyme 9 greater PM m we aim LR ailpara assessor a are i g 0 Normally when you train you deplete the g ycogen levels The b dy C Mrtowr recognizes that and then does what it can to replace it You train over and over again depleting the levels over and over again which makes your body start to adjlust lt realizes that it needs to start storing more I Bottom line you have these adaptions associated with the muscle biochemistry i in this case Glycogen Synthase Gate keeper ensyme can increase the activity and the concentration which allows for the ability to store more with time a You can deplete the glycogen levels through exercise and then replace glycogen by eating Cl lO in your diet 0 If you don t have the carbohydrates you need its not likely you will see the glycogen levels go back to normal 0 You work to perform some amount of exercise and your glycogen levels go down Then goes somewhere else to take in fats proteins for a couple of days Body realizes the depletion and tries to fix it Then you go to the olive garden and eat more carbs 9 lncrease the CHO stores the body 0 More energy more carbohydrates I Depletion is more effective because you can clearly store more SUMMARY i Bigger energy factories mitochondria more energy factories more raw materials in the form of carbohydrates to produce energi in these factories All we need to do is make sure we get adequate amounts of oxygen for these factories so we can take these carbs and produce energy in the form of increased myoglobin ln training you will also decrease hemoglobin levels which means you have more oxygen in the liver more oxygen taken up more oxygen put into the mitochondria so the factories can do their thing to produce energy so you can run longer or faster Exercise Physiology Lecture 5 Notes 91015 Oxidation of Fats 39 Oxidizes more fats as a result of training 0 When you look at some maximal levels of fat oxidation you will see increases beta oxidation activity increases enzymes involved more larger mitochondria if you get fat in you will have a greater ability to oxidize etcBut the conditions must be appropriate I If you are looking at intensities then you will have less fat contribution Whereas if you are looking at lower intensities you will have higher fat contribution i 40 50 optimization of fatty acid oxidation 0 You will also see an increase of capacity fer fat oxidation because its related to your ability to increase an enzyme calledllormone Sensitive Lipase to release of fatty acids from the adipose cells so you release more 0 If you increase the amount of carnatine by artificially inducing it by supplementation we should be able to take more fatty acids into the mitochondria make them available for fueli energy production 0 increases the activity of enzymes that transport fats Takes into the mitochondrial membrane 2 Takes from the mitochondrial membrane into the mitochondria 1 More FA into the mitochondria to make them available for fuel energy production 0 Did a study that supplemented 4 different groups of mice with different amounts of carnatine in the body and trained them on the treadmill o Carnatine by itself didn t do anything 0 But they did find out that I Training improves the ability to mobilize and oxidize fats I Adjustments in the body automatically prefer to use fat as fuel in submaximal exercise Anaerobic Chan es 0 ATPPC training might be a little different for making alterations in these biochemical processes The best Way to improve ATP PC is to challenge that system over and over again by doing interval training sprinting 0 As a result you will improve ATPPC system faster o Can be used for aerobic metabolism but if your goal is to be a sprinter then you don t really care about aerobics Exercise Physiology Lecture 5 Notes i 91015 I 0 Best way to improve is to train the system specifically t a Engage the system by y 39 7 o Interval training ATP PC 7 7 o logging at a longer duration I o Aerobic training degree probably less than anaerobic and interval l training a An increase of enzymes ATPase and increase in Creatine Kinase 0 Training will improve the concentration of these enzymes Ererci 5 Cum tour Giycoly sis PFK F 6P F 1 6Bisphosphate 39 PFK Very important REGULATORY enzyme 0 Regulates the events beyond this step 0 Effected by levels of ADP and pH 0 Can either turn on or shutdown glycolysis 39 Depending on ifyon need energy or if you already have too much 0 Increases with physical aerobic activity AND anaerobic activity but only when you are challenging the anaerobic glycolytic system
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