Metabolic Adaptations to HIIT- W7

Question 1

What is HIIT?

Answer 1

Repeated short periods of sprint exercise interspersed with low-intensity exercise or inactivity (rest)

Question 2

What does HIIT training increase?

Answer 2

Muscle glycogen during rest
PDH activity during exercise
CS, COX activity
COXII and IV protein contents in muscle
Increases muscle GLUT4, CD36 and PGC1a contents

Question 3

What does HIIT training decrease?

Answer 3

Glycogen breakdown during exercise
Lactate production during exercise

Question 4

What are adaptations of HIIT training?

Answer 4

Increased:
VO2max
Lipid: CHO proportion (Moderate intensity
Muscle Mitochondrial and Glycogen content
Endurance and Sprint performance

Question 5

What happens when there is detraining?

Answer 5

Increased CHO: Lipid usage during absolute intensity

Decreased VO2 max
Decreased Endurance Performance

Question 6

What is a resultant of increased CHO: Lipid usage during absolute intensity from detraining?

Answer 6

Decrease:
- Muscle mitochondrial content
- Muscle lipoprotein lipase

Increase:
- Adipose Tissue lipoprotein lipase

Question 7

What is a resultant of decreased VO2 max and decreased endurance performance from detraining?

Answer 7

Decreased resting muscle glycogen
Fibre types switch back

Question 8

What do the fibre types switch back too as a result of detraining from HIIT?

Answer 8

IIc back to IIa
IIa back to IIx

Question 9

What happens when resistance training is interrupted?

Answer 9

Decrease:
Maximal strength
Muscle cross-sectional area

Type IIa fibres switch to Type 11X