KIN 322 Exam 3- CRF

cardiorespiratory fitness

definition of cardiorespiratory fitness

ability to perform dynamic, whole-body exercise using large muscle groups at moderate to high intensity for prolonged periods

what systems make up cardiorespiratory endurance

pulmonary, cardiovascular, and muscular

what is VO2Max

highest rate at which O2 can be taken up, transported, and used in dynamic exercise

what is VO2 Peak

highest VO2 achieved during a specific test bout

may not equal VO2 max, depending on modality, protocol, or subject

what is the difference between absolute and relative VO2

absolute is not referenced to body mass, useful for non-weight bearing calculations

relative expressed per body mass to compare across body sizes

gross VO2

resting + exercise oxygen consumption

net VO2

exercise oxygen consumption only

guidelines for cardiorespiratory exercise testing

select maximal vs submaximal based on goals, risk, resources, and precision

prefer graded protocols, trained personnel and equiptment calibration

achieve steady-state when using submax

prescribe and monitor intensity using validated methods

monitor continuously

primary criteria for VO2 max attainment

plateau in VO2 with increased workload

secondary criteria for VO2 max attainment

HR not rising with workload

RPE >/=17

blood lactate > 8mmol/L

RER >/= 1.1-1.15

3 stages of CR exercise testing

pretest

during

post test

pretest procedures for CR exercise testing (2)

give pretest instructions, informed consent, risk screen

baseline resting HR/BP, RPE familiarization

during test procedures for CR exercise testing (4)

warmup

implement graded protocol

monitor HR, BP, RPE (ECG) and observe signs and symptoms

submax test: steady state HR for each workload

post-test procedures for CR exercise testing (2)

cool down until baseline reached

document performance, termination reason, and abnormalities

Absolute indications to terminate (5)

1. drop in systolic BP >10 mmhg with increased workload and ischemia evidence

2. moderate/severe angina, poor perfusion (cyanosis, pallor)

3. CNS symptoms (ataxia, dizziness, near syncope)

4. sustained ventricular tachycardia; ST elevation > 1mm in leads without diagnostic Q waves

5. severe shortness of breath/wheezing

relative indications to terminate (5)

1. drop in systolic BP >10 mmhg with increased workload, no ischemia

2. increasing chest pain, excessive fatigue, shortness of breath, leg cramps/claudication

3. arrhythmias (SVT) or non threatening conduction abnormalities

4. hypertensive response: S >250, D>115

5. reached predetermined endpoint