HHP 2200 Lecture Notes - Lecture 25: Weight Loss, Calorie
3 May 2018
School
Department
Course
Professor
Obesity
Risk of Obesity
• Genetic
o Ethnic background
o Single gene defects
o Gene polymorphisms
• Behavioral
o Sedentary lifestyles
▪ People now-a-days are less active than 50 years ago
o Unhealthy eating habits
▪ Calorie content, portion size (2x bigger than 40 years ago)
• Environmental
o Energy-saving devices
o Food more available
o Aggressive marketing
o Poor social trends
Obesogenic environment: obesity promoting environment (promotes increase energy intake and
reduces energy expenditure)
Increased Energy Intake: Reduced energy expenditure:
High-fat, energy-dense food Less work-related activity
Low-cost, easily available food Less activity of daily living
Large portion sizes More sedentary behavior
Obesity- Risk Factors
Nonmodifiable Modifiable
Age Physical inactivity
Heredity Excess caloric intake
Ethnicity/race Low socioeconomic status
Metabolism
Culture
PA & Weight
• Important to acknowledge difference between
o Weight stability = < 3% change in weight
o Weight loss = at least 5% loss of body weight
o Weight loss maintenance = Maintaining weight within 3-5% of new weight
▪ After weight loss, then maintaining that weight
MET-hours
• Method to deterie the dose or recoeded aout of PA to achieve a outcoe
• Multiple the time in hours by MET value
• PA Guidelines recommends 500-1000 MET-minutes
o How many MET hours?
o Divide by 60
o About 8-16 MET-hours
Evidence PA & weight
• Weight maintenance/Stability
find more resources at oneclass.com
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Document Summary
People now-a-days are less active than 50 years ago: unhealthy eating habits. Calorie content, portion size (2x bigger than 40 years ago: environmental, energy-saving devices. Food more available: aggressive marketing, poor social trends. Obesogenic environment: obesity promoting environment (promotes increase energy intake and reduces energy expenditure) Met-hours: method to deter(cid:373)i(cid:374)e the (cid:862)dose(cid:863) or reco(cid:373)(cid:373)e(cid:374)ded a(cid:373)ou(cid:374)t of pa to achieve a(cid:374) outco(cid:373)e, multiple the time in hours by met value, pa guidelines recommends 500-1000 met-minutes, how many met hours, divide by 60, about 8-16 met-hours. Pa and weight: exercise: not a cure all for losing weight, weight loss maintenance, preventing weight regain, or decrease abdominal fat; but it increases energy expenditure. Important considerations: obesity: not just about pa. intake is a factor as well, pa alone will not typically result in significant weight loss, substantial benefits from pa and exercise regardless of whether weight is lost.
