Exercise Testing and Prescription Flashcards
Indications for Exercise Testing in Pulmonary Patients
Understand severity of dyspnea
Understand O2 sat at rest and with activity
Determine exercise/activity tolerance
Provide information for exercise prescription
Evaluate for heart disease
PRIOR to ex testing
History Screening Lab values Physical exam Resting physiological measurements PAR-Q and You
PAR-Q
Physical Activity and Readiness Questionnaire
Good to add to any outpatient intake form to ID reasons to send pt back to physician prior to commencing an ex program
Risks with Exercise Testing
Mm soreness Diaphoresis SOB/SOA Angina MI Stroke Death
Safety with Exercise Testing
CPR certification
Emergency procedures in place
Monitoring equipment well maintained and available
ACSM ABSOLUTE C/I to Ex testing/training
Unstable angina Uncontrolled cardiac dysrhythmia Critical aortic stenosis (symptomatic) Uncontrolled symptomatic heart failure Acute PE Acute myocarditis/pericarditis Known dissecting aneurysm Acute systemic infection Significant EKG suggesting ischemia
ACSM RELATIVE C/I to Ex testing/training
Moderate stenotic valvular heart disease Electrolyte abnormalities Severe HTN Tachy or brady dysrrhythmias Neuromm, musculoskel, or RA d/o exacerbated by exercise High degree (3rd) heart block Uncontrolled metabolic disease Chronic infection disease Mental or physical impairment leading to inability to exercise adequately Orthostatic BP drop with symptoms
Severe HTN
SBP > 200 mmHg
and/or
DBP > 110 mmHg at rest
Orthostatic BP drop
SBP drop > 20 mmHg
Upper Limits for Exercise Intensity
Plateau or decrease in SBP (> 10 mmHg), SBP > 240 mmHg, DBP > 110 mmHg
Onset of angina or other symptoms of cardiovascular insufficiency
Increase frequency of ventricular arrhythmias
Onset of other significant EKG changes (2 or 3 degree AVB, a-fib, SVT, ventricular ectopy)
Radionuclide evidence of Left vent dysfunction or onset of moderate to severe wall motion abnormality during exercise
Other signs and symptoms of ex tolerance
Pt request to stop
Other signs and symptoms of exercise intolerance
Blah blah ask PT Fam
HR Max
208 - 0.7(age)
How do you monitor a pt during ex testing?
HR BP RR O2 sat RPE
When to use Borg Scale/RPE
Pts on meds that blunt HR response…
Betablockers
Digoxin
Calcium channel blockers
ACE inhibitors
Correlated well with HR if multiply rating by 10 (using 6-20 RPE scale)
Ratings of Dyspnea
0
No dyspnea
Ratings of Dyspnea
1
Mild dyspnea (mild, barely noticeable)
Ratings of Dyspnea
2
Moderate (bothersome)
Ratings of Dyspnea
3
Moderate severe (very uncomfortable)
Ratings of Dyspnea
4
Severe/intense - you need to stop!
Why Choose Max vs Submax ex testing
Maximal you are working someone to their MAX levels – it’s a hard test
Submax
Why?…
Lack of supplies
Don’t need to know
Max Exercise Testing
To diagnose disease
To determine max aerobic capacity and establish ex protocols
Assess medication levels
Exercise prescription
Assessment of ex/endurance training (outcome measure)
Increased sensitivity in CAD, especially asymptomatic
Better estimate of VO2 max/peak bc you will have a direct measurement of that
Make sure you have medical supervision and emergency equipment
Open circuit spirometry
Metabolic cart measures the gasses that are being released
What are you looking at during a max ex test?
HR plateau
SBP plateau
Amt CO2 produced causes sudden increase RR (signals anaerobic work)
RER
As it’s reaching 1, you’re maximized and using glucose for fuel
If it’s below 1, you’re using fat and carbs
Measured on metabolic cart
Commonly used symptom limited graded exercise tests (GXT)
Bruce Protocol - treadmill
Astrand-Rhyming protocol - cycle
Bruce Protocol vs Astrand-Rhyming
Higher VO2 with Bruce
Less expensive with UEE
Sub max ETT
Assess cardiorespiratory fitness
Determined HR response to 1 or more submax work rates
Results used to predict VO2 peak/max
Can give additional information (re: subject’s response to exercise)
Graded exercise tests
Cycle
Treadmill
Low Level Graded Exercise Test
Field tests
Individual dictates intensity
6MWT
Shuttle WT
1 mile walk
1 mile run
General Guidelines Before Exercise Testing
Avoid recent activity
Wait 2 hours after eating
2 hours after smoking or caffeine (can affect HR)
6MWT
Regression equations for calculating VO2 and distance walked
Prescribe exercise by estimating VO2 max/peak
Determine need for supplemental O2 (if O2
What if we stop the 6MWT due to non pulmonary/cardiac reason - can we still use these results (HR) for exercise prescription?
No because the HR is not indicative of a max HR
6MWT Facts
Men tend to walk further than women
Taller walks further than shorter
As we get older, we tend not to walk as far
6MWT VO2 max regression
Elderly - predicts VO2 max
COPD - Predicts VO2 max, need for transplant
CHF - predicts VO2 max, mortality, need for transplant
Can’t walk at least 200 m?
Indicators of suboptimal surgical results
Rockport 1 Mile Walk Test
Have pt walk briskly
Measure HR last quarter mile
1 Mile Jog
Should take 8-9 min
HR should not exceed 180 at end of test
Cross an intersection
Need to walk at over 0.8-1.22 m/sec
Community ambulation
Requires 50-122 cm/sec or 0.5-1.22 m/sec
Walk Velocity Test
6m, 10m, etc
Great way to tell if someone is able to be a community ambulator
Step Tests
Estimate VO2 max from direct HR response after stepping up and down step with specified time frame or at set frequency
Compare HR response to norms to give idea of fitness
Astrand-Rhyming
3-min YMCA Step Test
Harvard Step Test
Duke Activity Status Index (DASI)
Self-administered questionnaire
Sums of weights for “yes” replies
You would use this if a person can’t get up AT ALL
Right after cardiac surgery
Someone who is too weak
Someone who is unstable
Max Score on DASI
58.6
MET
VO2/3.5
Avg adult has around a 10 MET level activity tolerance
***IF VO2
Goals for Ex Training
Increase activity tolerance Increase function Increase QOL Central hemodynamic adaptations Peripheral adaptations to exercise
Factors to Consider When Designing a Exercise Program
Exercise goals Primary and secondary medical dx Medications Physical condition at baseline Activity preferences/personal goals
Essential Components of ExRx
Mode
Frequency
Intensity
Duration
Mode
Type of exercise
Focus on large mm groups
Try to match the exercise Rx with your pt’s interests and goals
Principle of specificity
Overload principle
Reversibility
Frequency
days per week the exercise will be performed to achieve goal
5 days or MOST days of the week!
Intensity
% of maximum capacity
ACSM - 50% for most pulm pts
AACVPR - 40% for most pulm pts
Duration
Time required for exercise on a given day
Much controversy, ACSM recommends 30 min a day or 150 min/wk at moderate intensity
AHA Guidelines
Ex 3-4 days a week
30-60 min
40-60% VO2 max
FITT
Freq
Int
Time
Type
Specificity
Training effects are specific to ex performed and mm used
Overload principle
To show functional improvement, system must be exposed to higher load than is usually accustomed to
Reversibility
Detraining occurs when stop training
HRR
HR max - HR rest
Karvonen method
Target HR = (% intensity)(HRR) + (HR rest)
VO2 reserve method of target VO2
Target VO2 = (% ex intensity)(VO2R) + (VO2 rest)
Intensity considerations
Age
Habitual physical activity level
Physical fitness level
Health status
Cardiopulm endurance
70-85% HRmax
Weight loss
55-65% HRmax
Deconditioned individuals
40-50% HRR
55-65% HRmax
When should pts reach their ventilatory threshold?
50-60%
RPE
11-13 on 6-20 scale
ACSM recommends 12-16 for physiologic adaptations
Stages of an Ex Session
Warm up: 5-10 min
Conditioning phase: 20-60 min
Cool down: 5-10 min
Recovery: time to return to baseline
Long, slow distance
LSD
Approx 70% VO2max
Approx 80% HRmax
Test intensity with the talk test
Pace/Tempo (Lactate Threshold Training)
Steady pace ex for 20-30 min
Interval
3-5 min with work:rest ratio 1:1
Repetition
30-90 sec with work:rest ratio 1:5
Fartlek
Combo of…
LSD
Pace/tempo
Interval
Repetition
Strength Training
Focus on low wt, high rep for endurance training
Use baseline 10 rep max test vs. 1 rep max due to risk of injury
Avoid valsalva to prevent vasovagal response
Flexibility
Minimal 2-3 days/week
Ideally 5-7 days/week
Static stretch of all major mm groups