Exercise and muscle use Flashcards
1
Q
What is hypertrophy?
A
Enlargement of a muscle due to repeated exercise
2
Q
What is atrophy?
A
Decrease in muscle size and strength due to disuse
3
Q
What does low intensity exercise cause slow fibres to do?
A
Increase mitochondria and capillaries: they become more fatigue- resistant but maintain size and strength
4
Q
What does forceful exercise cause fats fibres to do?
A
Increase number of actin and myosin filaments which enlarge fibres and entire muscle: this allows for stronger contraction
5
Q
What does not change with hypertrophy or atrophy?
A
number of skeletal muscle fibres
