Chapter 1 exam Flashcards
definition of physical activity
any bodily movement produced by skeletal muscles that results in caloric expenditure `
caloric expenditure is important in prevention and management of what 3 health issues
- obesity
- coronary heart disease
- diabetes mellitus
2 main benefits of physical activity
- health benefits
2. fitness benefits
4 fitness benefits of physical activity
- cardio-respiratory fitness
- muscular strength and endurance
- Musculoskeletal flexibility
- body weight
how can higher levels of cardiorespiratory fitness be acheived
increasing the frequency, duration, and intensity of an activity
how to improve muscular strength and endurance
regular use of muscles helps improve and maintain strength and endurance. This greatly increases the ability to perform the tasks of daily living without physical stress and fatigue
improving musculoskeletal flexibility
engaging in regular stretching exercises and physical activities that require one to stoop, bend and crouch and reach may help to maintain a level of flexibility to improve quality of daily living
improving body weight
physical activity burns calories increases the proportion of lean to fat body mass, and raises metabolic rate
what are the 2 biggest challenges facing public health in the US
- getting people to adopt a physical activity
2. getting people to maintain physical activity programs
what percentage of American adults are not sufficiently active
60%
what percent of adults get no leisure time physical activity
28%
when is there a dramatic decrease in physical activity
during adolescents in the last years of high school
what percent of 12y/o children report vigorous activity
70%
by age 21 what percentage of men and women continue vigorous activity
40% of men and 30% of women
what percentage of variation in physical activity is explained by genetic inheritance
20%
what is the dropout rate from exercise programs
50% across the first 6-12 months of participation
how many potential reasons have been found for people not being physically active
about 50
4 reasons why people are physically inactive
- beliefs about physical activity
- false expectations of a quick, easy impact on weight and shape
- poor self control skills
- social and physical environments which impede activity or reinforce other sedentary behaviors
6 barriers to physical activity
- demographic barriers
- socioeconomic status
- age
- obesity
- environmental barriers (physical and social)
- behavioral: past habits
what types of support are most important to adolescents and college students
Adolescents: peer pressure
College: family
top 8 reasons why people are not physically active
- embarrassed
- think of exercise as a punishment
- lack of time
- dangerous neighborhood
- can’t afford gym membership
- do not like to sweat
- results take too long
- exercise can be a lonely business i.e. lack of support
2 common determinants of participation in exercise
- self efficacy
2. social support
examples of how the physical environment can cause barriers
- lack of bicycle or walking trails
- inclement weather
- unsafe neighborhood
Risk Assessment: info required before beginning a program of moderate to vigorous activity
- awareness of pre-existing medical problems
- consultation before starting a program with a physician or other health care professional
- appropriate mode of activity and tips on different types of activities
- principles of training intensity and general guidelines as to rating of perceived exertion and training heart rate
- progression of activity and principles of starting slow and gradually increasing activity time and intensity
- principles of monitoring symptoms of excessive fatigue
- ways to make exercise fun and enjoyable
what theories/models have been most important to promote the initiation of and adherence to physical activity
cognitive behavioral techniques
what is life-style based physical activity promotion
focuses on home or community based participation in many forms of activity that include daily routine
researchers recommend promoting lifestyle changes whereby physical activity can be enjoyed throughout the day as part of ones lifestyle
what is the PACE+ model
- patient centered assessment and counseling for exercise and nutrition
- developed for use by primary care provider in the clinical setting targeting apparently clinically healthy adults
- stages of change model
what is the ecological perspective
the most effective form of interventions occurs at a variety of levels, meaning if you hear it from enough people you start to consider/believe it
what are the 2 factors withing behavioral interventions
- interpersonal factors: personality type, motivation, genetic pre-disposition
- environmental factors: social networks, physical environment
Type A personality traits
- competitive
- high acheivers
- sense of time urgency
- felt insecure at one point so they decide to change their lives by making achievements
Type B personality traits
- relaxed
- laid back
- not easily stressed
- procrastinators
5.
Type C personality traits
- love details
- like figuring out how things work
- not assertive
- lack of assertiveness results in high amounts of stress and sometimes depression
Type d personality traits
- negative outlook on life
- pessimistic
- socially withdrawn
- fear of rejection
- 3 times more likely to get a heart disease than the other personality types
define exercise
planned, structured, and repetitive movements which result in the improvement and/or maintenance of one or more facets of physical fitness
3 major components of Total Energy Expenditure
- basal metabolic rate (70%)
- thermic effect of food (10%)
- physical activity (20%)
define energy balance
the difference between the number of kilocalories that you eat (energy intake) and the number of kilocalories that you burn (energy expenditure
what is positive energy balance
if energy intake is greater than energy expenditure
person will gain weight
what is negative energy balance
energy intake is less than the amount of energy that is expended
lose weight
what are lifestyle physical activities
physical activities that are part of a persons everyday routine, unstructured
define epidemiology
study of how a disease of health outcome is distributed in populations and what factors influence or determine this distribution
what are the 2 assumptions in epidemiology
- Human disease is not random
- Human disease has causal and preventative factors that can be identified through scientific investigation of different populations or subgroups of individuals within a population
what is the primary goal of epidemiology
- identify the determinants of health and disease to decrease mortality and morbidity
what does physical activity epidemiology focus on
focuses on physical activity within popultions and investigates how physical activity levels impact health and disease to decrease mortality and morbidity
what are the 2 measures of morbidity
- Incidence Rate: number of new cases of a disease that occurs in a given time divided by the number of people in the population that is at risk for developing the disease
- Prevalence: number of affected people present in the population divided by the total population
What is the measure of Mortality
mortality rate: number of deaths in a specified time divided by the number of people in the population
Define biologic plausibility
- a theory based on existing medical literature that support the relationship or casual link between physical activity and a particular disease or health outcome
what is a confounder
something that negatively impacts your study and can potentially cause you to throw the data away
what is a p value
calculated value of what you hypothesize
what are the 2 main designs for Epidemiology study designs and which one is more effective
- Observational Study Design: development of disease or health outcome is observed and compared between different levels of physical activity,
- physical activity is self regulated - Experimental Study Design: random assignment of physical activity levels to individuals without the disease or health outcome
- these people are followed for a period of time to compare their development of the disease
* * most effective
what are 3 observational study designs
- cross sectional: look at a community, sensu bureau
- case control: follow one or two individuals to monitor change
- prospective: make a prediction on the individuals you are following
what are the 3 considerations when determining the accuracy of an assessment tool
- validity
- reliability
- sensitivity
2 reasons that accurate assessments are needed
- understand the specific amounts of physical activity that are needed for health benefits
- determine if a particular behavioral intervention was successful in changing activity behavior
4 pros of of the subjective measures
- nonreactiveness
- practicality
- applicability
- accuracy
3 cons of subjective measures
- does not reflect total energy expenditure
- reliability and validity problems
- Misinterpretation of physical activity across different populations
What is direct observation
- measures physical activity and identifies the type and specifics of the activity
pros and cons of direct observation
Pro
- provides both quantitative and qualitative info on a persons activity
- timely and labor intensive
what is indirect calorimetry
measures O2 consumption and CO2 production of short and long periods of time.
- Short duration: face mask
- long duration: metabolic chamber
what is doubly labeled water test
uses biochemical markers to estimate energy expenditure
heart rate monitors
- heart rate is a direct indicator of ones physiological response to physical activity
- heart rate is used as an indirect estimate of energy expenditure
pro: valid in both field and lab settings. low participate burden
con: can be expensive and uncomfortable
Activity monitors: what they are and pros and cons
- assess the acceleration of the body in one or more planes of movement
Pro: valid in both free living and lab settings, monitors intensity, frequency, and duration, non invasive
con: expensive and do not provide info concerning type of activity. inaccurate in upper body testing and cycling
pedometer
record steps taken and offer the ability to estimate the distance walked if stride length is known
pro: inexpensive, practical
con: not waterproof, not used to calculate cycling
Physical fitness can be broken down into 5 components what are they
- cardiovascular fitness
- muscular strength
- muscular endurance
- body composition
- flexibility
how can cardiovascular fitness be measured
- directly usuing maximal exercise testing (VO2 max)
2. indirectly using submaximal exercise and field test protocols
4 factors that may influence physical activity
- genetics
- gender
- age
- relative weight
2 causes that americans are too sedentary
- increased use of technology
2. increased use of automobiles
in 2000 what percent of adults reported no leisure time physical activity
26%
how many deaths per year in the US does physical inactivity contribute
300,000 and these are preventable
Percentages according to the rates of physical inactivity in:
- hispanic women
- non hispanic women
- asian and pacific islander
- white women
- hispanic: 57.2%
- non hispanic black 55.2%
- asain: 42.6
- 36.1
physical activity can help with what 3 things
- contribute to weight loss
- helpful for the prevention of overweigh and obesity
- helps maintain weigh tloss
examples of occupational work, household chores, and leisure time activities
- carpentry, construction, waiting tables, farming
- Washing floors or windows, gardening, or yard work
- Walking, skating, biking, swimming, playing Frisbee, dancing, softball, tennis, football, aerobics
physical activity decreases the risk for what 3 things
- colon cancer
- diabetes
- high blood pressure: increase blood flow from result of exercise causes blood vessels to gradually increase
how long should someone trying to reduce the risk of chronic diseases in adulthood exercise for
30 min of moderate intensity most days of the week
how long should someone exercise for if they are trying to manage weight and prevent unhealthy weight gain
60 min of moderate to vigorous intensity most days of the week
how long should someone exercise if they are trying to sustain weight loss in adulthood
60-90 min of daily moderate to vigorous intensity
how to calculate ideal body weight for:
men?
Women?
Men: use 106 lbs for first 5 ft, then add 6 lbs for each inch
women: 100 lbs for 5 ft then add 5 lbs for every inch
before beginning an exercise program you should check with your doctor if you:
- a man older than 40 or woman older than 50
- had a heart attack
- family history of heart problems before age 55
- have heart, lung, or kidney disease
- high blood pressure
- smoke
- are overweight or obese
what type of exercise decreases the incidence of type 2 diabetes
aerobic and resistance training
what percent reduction is there with the risk of colon cancer and breast cancer if you are active
30-40%
increased self reported physical activity resulted in what
- decreased reoccurence of cancer
2. decreased risk of death from cancer
What 3 things does testosterone affect
- increase bone formation, larger bones
- increase protein synthesis, larger muscle
- increased EPO secretion, increase red blood cell production
what 4 things does estrogen affect
- increased fat deposition (lipoprotein lipase
- faster, more brief bone growth
- shorter stature, lower total body mass
- increased fat mass, % body fat
where is the distinct female fate deposition pattern located
Rapid storage on hips and thighs due to increased lipoprotein lipase activity