Recovery from Exercise
Lactate Threshold
Fuel Utilization
Neuroendocrine
Hormones
100

What is Excess post-exercise oxygen consumption?

Repayment of oxygen deficit at the onset of exercise

100

What is the lactate threshold?

The point at which blood lactic acid rises systemically during incremental exercise

100

What is RER?

Respiratory Exchange Ratio

100

What release hormones into the blood?

Endocrine Glands

100

Epinephrine & Norepinephrine

Increase vasoconstriction, heart rate, glycogenolysis, and lypoysis, adrenal gland

200

What happens in the rapid portion of oxygen debt? (2)

Re-synthesis of stored phosphocreatine

Replenishing muscle and blood oxygen stores

200

What causes the lactate threshold? 

Low Muscle Oxygen, Accelerated Glycolysis, Recruitment of Fast-Twitch muscle fibers, reduced rate of lactate removal from the blood

200

At what RER are we mostly running off Fats? What about Carbs?

0.7 for fats

1.0 for carbs

200

How do hormones exert their effect?

By binding to a specific protein receptor

200

Antidiuretic Hormone

Retention of water, posterior pituitary gland

300

What happens in the slow portion of oxygen debt? (4)

Elevated heart rate and breathing

Elevated body temperature

Elevated epinephrine and norepinephrine

Conversion of lactic acid to glucose

300

What are practical uses of lactate threshold?

Predict performance and help with training programs as it can be a marker of training intensity

300

What percent VO2 are fats the primary fuel source? What about carbs?

<30% VO2 for fats

>70% VO2 for carbs

300

What is upregulation?

increase in receptor number in response to low concentration of hormone

300

Ghrelin

Stimulate Appetite, stomach

400

Why is EPOC greater following high-intensity exercise?

Higher body temp, greater depletion of PC, greater blood concentrations of lactic acid, higher levels of epinephrine and norepinephrine 

400

Does lactate cause muscle soreness?

NO

microscopic injury to muscle fibers leads to inflammation

400

Describe the cross over concept, why does it happen?

the shift from fat to carbohydrate metabolism as exercise intensity increase

Due to recruitment of fast muscle fiber and increasing blood levels of epinephrine

400

What is down regulation?

Decrease in receptor number in response to high concentration of hormone

400

Leptin

decrease appetite, adipose tissue

500

Does exercising after a max workout increase or reduce lactic acid concentration? Why?

Light intensity exercise (30-40% VO2 max) helps get rid of lactic acid from the blood more rapidly. 

500

What is the lactate shuttle? Where can lactate be shuttled to create glucose?

Lactate that is produced in one tissue is transported to another.

The liver

500

What percent VO2 does the cross over begin?

approx 35% VO2 max

500
What dictates the magnitude of effect of a hormone?

Concentration of Hormone, Number of receptor, affinity of the receptor

500

Growth Hormone

stimulates growth and cell reproduction, anterior pituitary gland

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