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15 Cards in this Set
- Front
- Back
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why is scale not an accurate determination for body fat?
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cant tell b/t fat weight and weight of strong bones and muscles
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why are height weight tables useless for teenagers
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still growing, havent fully matured
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2 ways body spends energy
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basal metabolism
voluntary action |
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number of calories a person expends on voluntary actions depends on (4):
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1.number and size of muscles
2.total weight of body parts used 3.length of exercise 4.amount of energy put in |
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why do most quick weight loss diets not work?
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lose fluids, not fat
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when fasting, what does body use for glucose?
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uses proteins and carbs --> glucose
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why does a fasting person lose so much weight initially?
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use up protein - 1/2 as many cals/pound therefore, lose double the weight
also for every 1 pound of protein lost, you lose 3-4 pounds of water |
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3 reasons why people overeat
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physcological appetite
stress depression |
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healthy weight to lose each week
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3500 cals, 1 lbs
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energy in vs. energy out
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in: calories you consume to function
out: calories you burn to function each day |
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basal metabolism
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1.circulation
2.respiration 3.temp maintenance 4.hormone secretion 5.nerve activity 6.new tissue synthesis |
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BMR
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=basal metabolic rate
increse by exercising, lean tissue burns more thyroxine: BMR regulator |
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factors that effect BMR
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age, height, growth, body comp, fever, stress, temp
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older people need less energy because:
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1.metabolism slows down
2.decreased muscle mass 3.reduced activity |
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energy diminishes
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5% every 10 years after 30
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