Exercise Intensity Domains

Question 1

which demarcate heavy intensity domains

In which domains do we see a steady state for lactate and ventilation

In the … domain, h and lactate production increase lots but our buffer system, …. can keep these metabolites at steady state

in which domain is there a greater increase of ventialtion over CO2 production, what is the phenomeman called

Blood lactate response to constant load exercise across the domains;
Severe
* …
Heavy
* …
Moderate
* …

Answer 1

GET and RCP and
First and second lactate thresholds

Moderate and heavy

Heavy domain, bicarb and hemoglobin system

severse, hyperventilation

Blood lactate response to constant load exercise across the domains;
Severe
* Increases and does not stabilize
Heavy
* Increase but stabilizes
Moderate
* No or very small change

Question 2

• Prescribing exercise at sea level vs. altitude?
• To meet O2 demands, cardiorespiratory responses to exercise (e.g., ventilation (V̇E), and heart rate (HR)) are … in hypoxia when exercise is performed at the same absolute intensity as in normoxia

SEA LEVEL
* VO2 max = … L/min
* MLSS is at … litters of O2
* PO at MLSS is … W

ALTITUDE
* VO2 max = … L/min
* MLSS is at … litters of O2
* PO at MLSS is … W - SHOULD BE …

• Blood lactate concentration and neuromuscular fatigue will be … if we exercise in altitude at the absolute intensity of sea level.
• The benefit of assessing MLSS in both sea level and altitude and prescribe exercise based on MLSS is that we are sure that the athlete experiences the ….!

Answer 2

• Prescribing exercise at sea level vs. altitude?
• To meet O2 demands, cardiorespiratory responses to exercise (e.g., ventilation (V̇E), and heart rate (HR)) are elevated in hypoxia when exercise is performed at the same absolute intensity as in normoxia

SEA LEVEL
* VO2 max = 4 L/min
* MLSS is at 3 litters of O2
* PO at MLSS is 220 W

ALTITUDE
* VO2 max = 3.5 L/min
* MLSS is at 2.6 litters of O2
* PO at MLSS is 170 W - SHOULD BE LOWER

• Blood lactate concentration and neuromuscular fatigue will be amplified if we exercise in altitude at the absolute intensity of sea level.
• The benefit of assessing MLSS in both sea level and altitude and prescribe exercise based on MLSS is that we are sure that the athlete experiences the same metabolic stress!

Question 3

Mean Response Time (MRT)

The ramp-incremental test is the gold standard to measure:
* …
* … (…)

During a ramp test:
* Power output …
* VO₂ … with …

At the very beginning of the ramp:
* VO₂ … … … Measured at the mouth
* Power Output …
This … (…)

During MRT:
* Power output …
* VO2 …

MRT occurs because of a … in …responses:
* … adjustments
* Humoral (……) adjustments

You are measuring oxygen in the mouth,
The muscle takes oxygen in the legs
but takes a few seconds for ventilation to be changed from oxygen changes

Answer 3

Mean Response Time (MRT)

The ramp-incremental test is the gold standard to measure:
* VO₂max
* Gas-exchange thresholds (GET and RCP)

During a ramp test:
* Power output increases steadily
* VO₂ increases linearly with power output

At the very beginning of the ramp:
* VO₂ does not increase immediately. There is a short delay. Measured at the mouth
* Power Output increases immediately
This delay is called Mean Response Time (MRT)

During MRT:
* Power output is increasing
* VO₂ stays stable for a few seconds

MRT occurs because of a transit delay in physiological responses:
* Neural adjustments
* HUMORAL (blood/chemical) adjustments

Question 4

MRT is measured from the … (…)

When prescribing exercise in the moderate domain:
* The … difference caused by … (about … W) must be … from the ramp power output
* If not …, exercise intensity will be …
* CONSIDER MRT WHEN WORKING WITH ATHLETE

For heavy and severe exercise domains:
* The … must also be considered
* Not just …

Application by intensity domain:
* Moderate domain → apply …
* Heavy and severe domains → apply …

Answer 4

MRT is measured from the Ramp Incremental Test (RIT)

When prescribing exercise in the moderate domain:
* The power output difference caused by MRT (about 12–15 W) must be subtracted from the ramp power output
* If not subtracted, exercise intensity will be underestimated

For heavy and severe exercise domains:
* The VO₂ slow component must also be considered
* Not just MRT

Application by intensity domain:
* Moderate domain → apply MRT only
* Heavy and severe domains → apply both MRT and the VO₂ slow component

Question 4

IF YOU WANT TO PRESCRIBE BASED ON VO2 MAX, YOU …

The plateau is mean response time on the graph

What power output elicits 75% of VO2 max
- you should exercise at 260 Watts
- THAT IS NOT CORRECT
- why is there a black point at 4L, I told you to go at 260 to get 3L
- at 235 watts you still take more than 3L

75% of vo2 max from a RIT
now it is a constant load exercise
DISSOCIATION between constant load and RIT
happens at intensity above GET
gets larger as intensity increases

AT ANY INTENSITY …, THERE IS NO DISSOCIATION OF RIT AND CONSTANT LOAD
GREATEST DISSOCIATION HAPPENS …
,
IF YOU DO NOT CONSIDER RCP, YOU THINK THEY EXERCISE AT 75% BUT ARE ACTUALLY AT 100%
Why can’t you go for 30 minutes? Why did you stop at 5 minutes?

when you prescribe exercise, regardless of intensity domains, you should consider MRT
there is no VO2 slow component in the …

Answer 4

IF YOU WANT TO PRESCRIBE BASED ON VO2 MAX, YOU MUST SUBTRACT MRT TO PRESCRIBE EXERCISE

AT ANY INTENSITY BELOW GET, THERE IS NO DISSOCIATION OF RIT AND CONSTANT LOAD
GREATEST DISSOCIATION HAPPENS ABOVE RCP,

IF YOU DO NOT CONSIDER RCP, YOU THINK THEY EXERCISE AT 75% BUT ARE ACTUALLY AT 100%
Why can’t you go for 30 minutes? Why did you stop at 5 minutes?

there is no VO2 slow component in the moderate domain