Final Exam Flashcards
Cardiorespiratory Fitness (CRF)
ability to perform large muscle, dynamic, moderate-to-high intensity exercise for prolonged periods of time
VO2 Max
The maximal volume of O2 that can be consumed during a progressive exercise for prolonged periods
what is the gold standard for CRF?
VO2 max
Steady-state- HR
HR that varies <5 bpm
Why should you asses CRF?
- considered one of the best indicators of collective health
- individualization of exercise prescription
- tracking and motivating toward exercise progression
- clinical purposes
- Low CRF is an independent risk factors for CV mortality
What are the clinical purposes of assessing CRF?
- aide in making occupational disability determinations
- prognostic and diagnostic of chronic disease
What are two alternative approaches to assessing CRF when VO2 is not feasible?
Field tests
- non-laboratory settings
- can be administered to groups or individuals
Submaximal exercise tests
- tests with effort limited to submaximal exertion
- typically in laboratory setting
Maximal testing advantages and disadvantages:
Advantages
- determines lung and heart health
- accurate results
- true baseline
- see your limit
- MEASURED
Disadvantages
- time consuming
- expensive
- exhaustive (safety)
Submaximal testing advantages and disadvantages:
Advantages
- takes less time
- not all the way to max
- less expensive
- doesn’t need specific people to run it
Disadvantages
- estimations
- lab setting
What are examples of CRF assessment modes?
- Field (rockport 1 mile walk, cooper 12 minute run, ymca step test, queens college step test)
- Cycle ergometer (ymca cycle ergometry test)
- Treadmill (vo2 max)
- Elliptical (elliptical submaximal test)
What would factor in to deciding how to test CRF?
- reasons for test
- risk level
- cost
- time required
- personnel required
-equipment and facilities required
What are some assumptions made for submaximal tests?
- steady-state HR is achieved for each exercise stage
- a linear relationship exists between HR and VO2 max
- the difference between actual and predicted maximal HR is minimal
- everyone is able to maintain the desired cadence/speed
What are some sources of error for submaximal tests?
- prediction of HRmax is by age
- efficiency of the participant performing the test in ergometer
- equipment calibration
- accurate measurements of HR during each stage
- having a steady-state HR at each stage
What is the standard error range for predicting maximal HR?
_+ 10-15 bpm
Predicting maximal HR is fundamental to administering what tests?
submaximal tests
General procedures for submaximal testing of CRF:
- obtain resting HR and BP immediately prior to exercise in exercise posture
- familiarization with equipment
- 2-3 minute warm up
- a specific protocol should have 2-3 minute stages with appropriate increments in work rate
- HR should be monitored atleast 2 times during each stage towards the end (if greater than 110 HRss should be reached before moving on)
- BP should be monitored in the last minute of each stage and repeated if hypotensive or hypertensive response
- Rating of perceived exertion (RPE) and additional rating scales should be monitored towards the end
- appearance and symptoms should be monitored regularly
- test should be terminated when participant reaches 70% HRR
- appropriate cool down should be initiated
What are the pretest standardizations for CRF assessents?
- wear comfortable clothes
- avoid tobacco & caffeine 3hrs prior to the test
- avoid alcohol 12hrs priori to test
- have plenty of fluids and avoid strenuous exercise for the previous 24hrs
- obtain adequate sleep night before test
- complete informed process
- complete par-q+ or other health-screening tool
- explain the RPE scale
What are some of the general indications for stopping and exercise test?
- angina
- drop in systolic BP of >10mmHg
- excessive rise is BP (sys. >250 or dia >115)
- shortness of breath, wheezing, leg cramps, or claudication
- signs of profusion
- failure of HR to increase with increased intensity
- noticeable change in heart rhythm by palpation or auscultation
- request to stop
- physical and verbal manifestations of exercise intensity
- failure of testing equipment
Absolute VO2 measurement:
L/min
Relative VO2 measurement:
ml/kg/min
What are the principles of ACSM exercise perscriptions?
- should aim to improve on or more components of health and decrease periods of physical inactivity
- should follow FITTVP
- should also consider (goals, physical ability, physical fitness, health status, schedule, physical and social environment, available facilties)
- should be based on ExRx (goals, results, and recommendations)
What are some general considerations for ExRX?
- CVD and musculoskeletal complications can be minimized by…
- following preparticipation health screening and eval. procedures
- beginning new programs at light-to-moderate intensity and gradually progressing
- follow ACSM guidelines - behavioral interventions are important to reduce barriers and enhance adherence
What are the components of an exercise training session?
- Each session should have a goal in mind
- should include three phases (warmup <15 min, conditioning- 10-60min, cool-down)
What is the frequency, intensity, and time of aerobic exercise?
3 days/week, moderate (40-59%) or vigorous(60-89%), 30-60 min/day moderate or 20-60min vigorous
Frequency, intensity, and duration are…
interdependent
What is the talk test?
Use a nursery rhyme to have client say during exercise and if they can do it with little to no difficulty it is an appropriate intensity
What is positive dose-response?
health/fitness benefits with increasing intensity
What is the overload principle?
exercising below a minimum intensity will not challenge the body sufficiently to result in physiological parameter.
What is interval training?
intermittent periods of intense exercise separated by periods of recovery - can elicit similar physiological adaptations with lower total work loads
What is the principle of specificity?
physiological adaptations to exercise are specific to the type of exercise performed
What are some things to considered when deciding what type to prescribe for aerobic exercise?
- Principle of specificity
- skill level
- muscle groups used
- activities that place different stresses on the body
Pedometers:
7000-8000 steps/ day
>_ than 3000 at brisk pace
How do you progress CRF?
- start low and go slow
- all progressions should be graudal to decrease injury and lessen soreness
- initially increase duration by 5-10 minutes every 1-2 weeks for the first 4-6 weeks
- after 1 month increase frequency, intensity, and time for the next 4-8 weeks
Absolute vs relative VO2:
absolute is for non-weight bearing
relative is used for weight bearing
What is body composition?
the relative proportions of fat and fat-free tissue in the body
What is fat mass (FM)?
All lipids from adipose and other tissues in the body
What is fat free mass (FFM)?
all lipid-free tissues including water, muscle, bone, connective tissue, and internal organs
What is percent body fat (%BF)?
fast mass expressed as a percentage of total body weight
Why should you asses body comp.?
- identify health risks, or promoting understanding of health risks associated with too much or too little body fat
- assessing the effectiveness of exercise and/or nutrition interventions
- estimating ideal body weight to formulate dietary recommendations and exercise prescriptions
- monitoring growth, development, maturation, and age-related changes in body comp. (especially in kids)
- Formulating interventions to prevent chronic disease later in life
What is excess body fat associated with?
- hypertension
- metabolic syndrome
- type 2 diabetes
- stroke
- cardiovascular disease
- dyslipidemia
What is low body fat associated with?
- malnutrition
- eating disorders
- fluid-electrolyte imbalances
- renal and reproductive disorders
- osteoporosis and osteopenia
- muscle wasting
What functional impairments can both obesity and sarcopenia result in?
Decreased:
- walking speed
- stability
- postural control
- neurocognitive function
Increased:
- musculoskeletal pain
What is the gold standard test for body composition?
there is not one
what are the clinical measures for body composition?
Dual-energy x-ray absorptimetry (DEXA or DXA)
- expensive
- requires highly trained personnel
Fitness-related standards
- underwater weighing (UWW)
- determines body density (Db)
What are the anthropometric methods of finding body comp.?
Height
weight
circumferences
skinfolds
what are the densitometry methods of finding body comp.?
hydrodensitometry (UWW)
air plethysmography (bodpod)
What are the classifications of BMI?
Underweight - <18.5
Normal - 18.5-24.9
Overweight - 25.0-29.9
Obesity class I - 30.0-34.9
Obesity class II - 35.0-39.9
Obesity class III - >40.0
What are the pros and cons of BMI?
Pros:
- simple
- quick
Cons:
- fails to distinguish between fat, muscle mass, and bone
What is body circumferences a predictor of?
The pattern of body weight distribution can be a predictor of health risks of obesity
What is Android obesity?
characterized by more fat on the trunk
- increased health risks
-“apple”
What is Gynoid obesity?
characterized by more fat in the hip and thigh
- “pear”
Where are the anatomical locations where you measure waist and hip circumference?
Waist:
horizontal measure at the narrowest part between the umbilical and the xiphoid process - individual stands, arms at side, feet together, and abdomen relaxed
Hips:
horizontal measure at the maximal circumference of the bottocks - individual stands, feet together
What is the procedure for measuring circumferences?
- all measurements should be take with a flexible yet inelastic tape measure
- tape should be on skin suface without compressing the subcutaneous adipose tissue
- extend the gulick spring loaded handle to the same marking each trial
- rotate through measurement sites to allow skin to regain normal texture
- take duplicate (2) measures at each sight within 5mm of each other