Physical Activity Flashcards
What is meant by physical fitness?
Measurable state
What is meant by physical activity?
any movement(skeletal muscle movements that require energy)
What is meant by physical exercise?
Planned activity - physical activity that is planned, structured, repetitive and aims to improve one or more components of physical fitness
Exercise is a subset of _____?
Physical activity
Where does the most of our energy expenditure go?
Resting metabolic rate - what it takes to run our bodies
What is second most source of our energy expenditure?
NEAT(Non exercise activity thermogenesis)
What are adaptations to CV function with physical activity?
Increased total blood volume
Increased ventricular compliance
Increased venous return
Increased contractility
Increased EDVolume
Increased EF
Increased Stroke Volume
Increased CO
Increased effectiveness of cardiac output distribution
Optimized peripheral blood flow
Increased blood flow to active muscle
Decreased resting heart rate
What increase in met lead to what percent reduction in VAT?
Increase in 1 met per week led to 4% reduction of VAT
How does physical activity affect hunger and satiety hormones?
Ghrelin is suppressed and satiety hormones, esp PYY is elevated in response to acute bouts of mod to high intensity exercise(during and immediately after for short term)
How many americans meet physical activity guidelines?
<25%
How many kcal/kg/day do you have to burn to prevent weight regain?
11-12 kcal/kg/day
What is important for remission of diabetes?
Exercise
What is the average number of steps per day for US adults?
<5000
What is the number of steps that is considered low active?
5000-7500
What is the number of steps that is considered somewhat active?
7500-10,000
What is the number of steps that is considered active?
> 10,000
How many hours of sitting per day is considered inactive?
> =6
Female college students who sat => 7.5 hours per day had how many fold times for risk of obesity?
10
How much screen time should kids be allowed if in active weight mgmt program?
<=1 hour
Which patients might need CV evaluation with exercise stress test prior to starting exercise program?
If non exerciser, with cardiovascular, metabolic or renal disease and/or signs/symptoms that suggest these diseases.
What is an effective way to reduce knee -joint loads in adults facing obesity when it comes to exercise?
Walk at slower speeds
What is a way to exercise to rehave OA knee?
Exercising with wider pedal stance
What should be part of physical activity prescription?
Frequency
Intensity
Time
Type
Enjoyment
How do you know if you are doing moderate exercise?
Starting to get challenging
Conversation takes a little effort
How do you know if you are doing vigorous exercise?
Challenging
Conversation difficult
What are some ways to measure intensity?
Heart rate
Perceived exertion
Talk Test
Accelerometers
How do you calculate the heart rate needed for moderate intensity exercise?
220 minus age x (64-76%)
How do you calculate the heart rate needed for vigorous intensity exercise?
220 minus age x (77-93%)
What is the Borg scale?
Perceive exertion
What are the numbers correlate with on perceived exertion?
6 - no perceived exertion
12-14 - moderate level of intensity
>20 - maximal exertion of effort
How do you calculate the heart rate from perceive exertion number?
Multiply it by 10
What is the preferred method to assess intensity among those individuals who take medications that affect heart rate or pulse?
Perceive exertion
How often should you do the talk test?
Every 15 minutes
What is an efficient way to increase total muscle mass?
Resistance training in large muscle groups
Development of which muscles is important for balance and stabilization?
Core
How many hours should you limit for prevention of weight gain in children in regards to screen time?
<=2
How should exercise be tailored for children in weight mgmt program?
Planned supervised active play for 60 minutes a day.
How should exercise be tailored for children in weight gain prevention program?
60-90 minutes of unstructured play
Where do you see a VO2 max decrease?
Aging and higher BMIs
What does 1 MET equal?
amount of energy expended in 1 minute while lying at rest
3.5 ml O2 consumption per kg of bodyweight per minute
sitting quietly, body at rest, RMR
How many RMR = 2 mets?
2
What does the MET do?
Estimates energy expenditure or cost of a particular activity
How many METs are considered light activity?
<3 METs - driving, standing, walking
How many METs are considered moderate activity?
3-6 METs - walking at 4mph, brisk pace
How many METs are considered vigorous activity?
> 6 METs - carrying 25-49 lbs up stairs(8)
Running 10 mph(16)
How much of total body mass is lean body mass?
75%
What composes lean body mass?
40% muscle
25% organs
10% bone
What is difference between FFM and LBM?
LBM includes essential fat in organs, CNS and bone marrow. Both include water, mineral, protein/glycogen.
Fat mass is associated with what state?
Disease
Lean body mass is associated with what state?
Health
What does MET stand for?
Metabolic equivalent tasks
What is a strong predictor of longevity?
Muscle mass
What is muscle mass determined by?
Muscle protein synthesis and breakdown
What is muscle protein synthesis sensitive to?
Mechanical load and nutrition status
Which type of muscle fiber has more mitochondria?
Slow
Which type of fiber is a type 1 muscle fiber?
Slow
Which type of fiber has higher myoglobin count?
Slow
Which type of fiber has increased capillary density?
Slow
Which muscle fiber is aerobic?
Slow
Which muscle fiber is anaerobic?
Fast
Which muscle fibers are used for sprinting?
Fast
Which muscle fibers are used for long distance running and endurance activities?
Slow
Which muscle fiber has higher oxidative capacity?
Slow
Which muscle fibers are larger - fast or slow?
Fast
At what age does skeletal muscle start to decline?
Age 30 with more significant losses at age 65 and 80
What contributes to sarcopenic obesity?
lower physical activity and lower basal metabolic rate of adipose tissue so lower resting energy expenditure
What type of exercise is best for muscle hypertrophy and improve muscle strength and function in older adults?
Resistance exercises
Which type of exercise is best for strength and reducing intramuscular fat?
Eccentric exercise