Questions And Well Elaborated Solutions
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Demands). Dependent on the TYPE and MODE of exercise. Example: a
client wants to improve their time in an endurance run, you select
training stimulus that is appropriate. (eg. endurance activities, not
swimming.
7 ways of determining exercise intensity - ANSWER- 1. Heart
rate reserve method. 2. Peak HR method
3. Peak VO2. method
4. Peak METs method
5. VO2 reserve method
6. Talk test method
7. RPE method
(HRR) Heart rate reserve method KARVONEN FORMULA -
ANSWER- The difference between max HR and resting HR. Target
HR = [(max HR -resting HR) X %intensity desired] + Resting HR.
Peak HR method - ANSWER- 220-age = max HR. (SD of 12-15 BPM)
Target HR = max HR X % intensity desired
Peak VO2 method - ANSWER- must have measured or estimated
VO2max.
Target VO2 = VO2max X intensity desired
Peak METs method - ANSWER- Target METs = (%intensity
desired)(VO2max in METS -1) +1
,VO2 reserve method
What is VO2 reserve? - ANSWER- VO2 reserve is the difference
between VO2 max and VO2 rest. (determined in a lab setting)
Target VO2 reserve = [(VO2max - VO2 rest) x %intensity desired] +
VO2rest
Talk test method - ANSWER- differentiates between moderate and
vigorous activity. If they can talk, but not sing it is moderate. If they are
unable to say more than a few words without pausing for a breath it is
vigourous.
Borg's RPE scale. What level is recommended to improve
cardiorespiratory fitness? - ANSWER- ranges from 6 to 20. from no
exertion at all to maximal exertion. 11 to 16 to improve CRF.
What is the CR-10 scale of exertion? (Borg's category ratio scale) -
ANSWER- scale of 0 to 10. in which 0 is sitting and 10 is max effort
possible. 5-6 is mod. 7-8 is vig.
Symptoms identified during an exercise test in which the test should be
stopped. - ANSWER- Drop in SBP 10 or below.
Rise in BP above 250 and/or 115. Failure
of HR to increase
failure of test equipment
Do individuals with cardiac, respiratory, metabolic, or musculoskeletal
disorders need to be supervised by trained personnel? - ANSWER- Yes,
when beginning an exercise program
What is target heart rate? How do you determine it? - ANSWER- Must
consider the habitual PA, exercise level, and goals to determine the %
intensity desired.
,Common musculoskeletal injuries signs and symptoms. - ANSWER-
Point tenderness
Pain when body part is at rest
Joint pain
Pain that continues after warming up.
Swelling or discoloration
Increased pain with weight bearing activities changes
in normal bodily functions
Intrinsic risk factors to injury - ANSWER- History of previous injury
Inadequate fitness/conditioning
Body composition
Bony alignment abnormalities
Flexibility/strength imbalances
Joint laxity
Musculoskeletal disease
Extrinsic risk factors to injury - ANSWER- Excessive load on the body
Type or speed of movement
number of reps footwear
surface training errors
excessive distances fast
progression high intensity
running on hills poor
technique fatigue
environment conditions
Exercise in heat yields? (relate to HR as well) - ANSWER- Dehydration
risk, increased blood flow to the skin (away from working muscles),
HIGHER HR values.
Exercise in the cold yields? - ANSWER- Vasoconstriction of blood
vessels in the skin, HR and cardiac output are similar to thermoneutral
, environment, wearing bulky clothing is a barrier, Respiratory rate is
higher and VO2 max may be slightly lower. Some individuals may
perceive exercise to be more difficult in the cold
Exercise in high altitude - ANSWER- "thin air" same amount of oxygen
in the air at ALL elevations. It is the change in barometric pressure that
causes the PO2 to decrease. SV decreases and HR increases during first
initial days. Safe to assume that there will need to be a significant
reduction in intensity and duration of activities.
acclimatization vs. acclimation - ANSWER- acclimatization -
Physiological adaptation that occurs in response to a change in the
"natural" environment.
acclimation - physiological adaptation that occurs in response to
EXPERIMENTALLY induced changes in climate.
Heat acclimatization, cold acclimatization, altitude acclimatization
benefits - ANSWER- Heat- lower core body temp, skin temp, high
sweat rate, lower HR, lower perception of effort, improved conservation
of sodium. (recommended 10 consecutive days in heat) cold- maintain
heat production by means beside shivering, maintenance of hand and
feet temperatures. altitude- Increases O2 carrying capacity in the blood.
(Erythropoiesis, production of additional RBC) "live high" "train low"
Benefits last up to 3 weeks.
Smallest contractile unit of a muscle - ANSWER- Sarcomere
Type I fibers - ANSWER- Slow twitch fibers. Lower contractile force.
better for endurance activities
Type II fibers - ANSWER- Fast twitch fibers. Higher contractile force.
better for strength and power activities.