3 Class EXSC 205 notes:
o ATP + CP use o Know how we use these o How many calories we have of these o Fuel reserves o Intensity vs. metabolic pathway o When sprinting all of energy coming from ATP o As intensity goes down aerobic o Immediate sources anaerobic, aerobic--3 sources o Preview questions not part of exam o Glycolysis(C6H12o6) o Fuel glyclose o Atp-4 gross; 2 net o Enzyme-LDH (NAD) o End product-pyruvate Either goes to lactic acid(when there is insufficient oxygen to fulfill cytocrom system) or aerobic o Aerobic metabolism o Pathway in mitochondria o Krep Cycle + cytocrom system o KC + Fat, protein, carb All fuels can be utilized in krep cycle Whats the end product-nitrogen in the piss? o Cytochrome system O2 + H cytochrome oxidates (primarily transport hydrogen) Oxygen is a hydrogen scavenger o ATP production o Carbs 36 (34 aerobic system) o Fats 130 3.5x more atp from fat that carb requires more oxygen to metabolize fat o Efficiency of energy conservation save about o E= derived / potential -- -( save about 40%) o Uncoupling agents o Adp + P =Energy goes to(blocked here) ATP o Block the final reaction in the cytochrome change Reduces the efficiency of energy conservation o Resp quotient RQ o RQ= VCO2/VO2 .7=100% fat; .85 =50%/50%; 1.0= 100% carbs o 1 Rq unit= 3.33% o know how to make calculations
o Sports + Met pathway o Know where energy is derived from o Muscle fiber types o 1-STO- slow, low tension, endurance, slow twitch oxidative high Mitocondria, high capillaria/fiber ratio o 2a-FTGfast, high tension, fatigues fast, fast glitch glycholitic more actin and myocym, more glc enzymes o 2b-FTO-characs of wither above one o balance in a normal person is usually 50-50 o Energy production o Measureing Direct calorivity Measure heat disipation Indirect (1 LO2=5 Cal) Uses oxygen consumption value Heart Rate HR Qualitative evaluation o Resting Metabolic Rate-estimate by using fat free mass 1 kg FFM= 30 cal/day 1 lb FFM=13.6 o Activities Run-100 cal/mile Walk-80 Cycle -20-25 Swim-300-500+ Activity calories/total calories= RMR usually 90% of calories used in the day o Efficiency-work/energy LO2=5 cal=2153 kgm= 15.575 ft. lb @ 100% efficiency(memorize) Efiiciency of converting chemical energy into physical movement WORK DONE/energy used=E Must know energy work equivalents Ex-600kgm/ VO2 x 2153? Net efficiency=account for resting value o Subtract value from denom No group differences in efficiency exist Ex. IF 10 cal/min at 100% efficiency If only 15% efficient= 10/.15 to convert to 67% efficient o Economy-more to do with mechanics o Energy intake Eat cal/gm; cal/lb (x 454)---caloric density Fat 9.1; 4100 Protein 4.0; 1800 Carb 4.0; 1800 Alcohol 7.0; 3500 o Measure of weight/height
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o BMI= mass(kg)/ht(m squared) o 1 kg= 2.2 lbs o 1 inch= .0254 cm 18-24 normal; >17 under; <25 over no gender discrepany different for children under 16 Body comp methods o Skin folds- measure subutanius fat o Bioimpedance--H2O to FFM o H2O weight density--mass/volume Density kg/liter o Fat= .9 o H2O =.99 o FFM=1.1 Fat free mass is 20 % heavy than fat o Muscle is about 50% heavier % fat o MALES= 15 avg; 10-20 range; >25 obese o Females= 25; 20-30; >35 Causes of obesity o Genetics vs environment o Solutions Drugs Surgery