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Lecture

Exercise Nutrition - Lecture 24

7 Pages
125 Views

Department
Kinesiology
Course Code
Kinesiology 3339A/B
Professor
Peter Lemon

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O
Continuation of Fat Unit
-ÊCovers some aspects of fat that may lead to exercise performance
-ÊWheat-germ oil
ÔÊ0ften suggested to enhance exercise performance but there really isn͛t any convincing
evidence of that
ÔÊContains some essential nutrients ʹ that if you were deficient in, and you supplemented
with it ʹ it would increase your performance
-ÊLecithun
ÔÊYssociated with formation of acetylcholine
Ê0ne of the neurotransmitters
ÔÊLecithun
ÊWill increase the amount of acetylecholine and reduce fatigue
Ê£owever, unsure of whether it has any value
-Ê0mega-3s
Ôʺotential for health and potential to effect performance
Êncrease blood flow and oxygen delivery to muscle
ÔÊUnsure whether it will enhance performance
-ÊCarnitine
ÔÊncreasing carnitine may facilitate fat uptake into mitochondria
ÔÊLots of carnitine in diet ʹ no increase in fat uptake or utilization
Êÿecause it increases just blood carnitine, not amount in mitochondria
iÊDherefore, it doesn͛t help with exercise performance
-ÊCaffeine supplementation
ÔÊ[oes enhance several types of performance
ÔÊYt one time, it was banned by 0C as a doping agent
ʺeople were disqualified if they were caught with metabolites of caffeine in
urine
ÔÊtill banned in some other corporations
ÔÊo longer banned with 0C because it͛s found in a lot of food products that people
consume
ÊCoffee, chocolate
iÊWhen people don͛t attempt to dope, they might be seen as a cheater
when they consume these kinds of products
ÔÊWould need 4-6 cups of coffee to be considered doping
ÔÊ· of V02
ÊYthletes compete this high in intensity during competition
ÊDime to exhaustion ʹ 49 minutes without caffeine supplementation and 71
minutes with caffeine supplementation
Êumber of studies show that it enhances performance in endurance exercise
but also enhances performance for short-term exercise (-7 minutes too!)
iÊ[osage to increase performance = as low as 2-3 mg/kg
ÔÊhould experiment in training before using caffeine during competition
ÔÊCaffeine stimulates nervous system (major mechanism)
Ê@echanism of action
iÊtimulates muscle contraction
iÊFat metabolism increased
ÔÊot really a main mechanism --- not completely proven
iÊlycogen sparing = not huge either
ÔÊÿecause study was conducted on people exercising at lower
intensities than athletes in competition
-Êraph
ÔÊCaffeine is found in a lot of different foods
Êoft drinks
ÊCoffee
ʺills
ÊChocolate
Êome types of teas
iÊ[epends on how you prepare it
ÔÊValues are based on a 6-· ounce cup
ÔÊYddictive drug
ʺhysical dependence
-Ê@ixture of things that have been used to help with fat loss
ÔÊ@ixture of caffeine, aphedrine and sometimes aspirin = aid to fat loss as long as it͛s
carefully monitored
Êÿecause both are stimulants
iÊYphedrine = powerful stimulant, adverse cardiovascular effects
ÔÊCan lead to heart arrhythmias and death
iÊYphedra = ma huang
ÔÊn some asian herbs that you might purchase as a natural option
to aphendrine
ÔÊn some people ʹ they have the same harmful effects as
aphedrine
Ê?phedrine caffeine stack = increases fat loss and helps maintain muscle mass
-Ê£ow does it work?
ÔÊncreases sympathetic activity (just like ? or ?)
ÔÊ@imics effects of stress hormones and therefore it increases glycolysis
Ê£elps mobilize fatty acids for use as energy
ÔÊ£as been shown to increase metabolic rate
Êÿiggest single factor contributing to D[??

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Description
KIN 3339AExercise Nutrition thLecture 24Monday November 7 2011 Continuation of Fat UnitCovers some aspects of fat that may lead to exercise performanceWheatgerm oil o Often suggested to enhance exercise performance but there really isnt any convincing evidence of thato Contains some essential nutrientsthat if you were deficient in and you supplemented with itit would increase your performanceLecithun o Associated with formation of acetylcholineOne of the neurotransmitters o LecithunWill increase the amount of acetylecholine and reduce fatigueHowever unsure of whether it has any valueOmega3s o Potential for health and potential to effect performanceIncrease blood flow and oxygen delivery to muscle o Unsure whether it will enhance performanceCarnitine o Increasing carnitine may facilitate fat uptake into mitochondria o Lots of carnitine in dietno increase in fat uptake or utilizationBecause it increases just blood carnitine not amount in mitochondria y Therefore it doesnt help with exercise performanceCaffeine supplementation o Does enhance several types of performance o At one time it was banned by IOC as a doping agentPeople were disqualified if they were caught with metabolites of caffeine in urine o Still banned in some other corporations o No longer banned with IOC because its found in a lot of food products that people consumeCoffee chocolatey When people dont attempt to dope they might be seen as a cheater when they consume these kinds of products o Would need 46 cups of coffee to be considered doping o 85 of V02Athletes compete this high in intensity during competitionTime to exhaustion49 minutes without caffeine supplementation and 71 minutes with caffeine supplementation
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