What happens to the fiber type composition of a muscle as one ages?
Decrease in the number type 2 and increase type 1
Early improvements in muscular performance can be attributed to what?
Neural and muscular adaptations
How does neural adaptation increase muscular performance?
Increase in the number of motor units, the motor units learn synchronization and fire at the same time, and rate coding (increasing the frequency)
What are the muscular adaptations to aerobic exercise?
Increase number of mito, size of mito, enzymes of the krebs cycle, myoglobin, vo2 max, ability to utilize fatty acids during and after submaximal exercise, vascularization of caps, glucose transporters, and type 1 fibers.
What happens to the hybrid fibers as you train?
They decrease and you gain more pure fibers
How are endurance training and HIT training similar and different?
Same kind of results but HIT does it in 90 % less training volumes. So HIT is time efficient
What happens during detraining?
Major loss of the gains you had earned are lost within 1 -2 weeks, but are quickly gained again once training resumes.
What is increased in the blood during DOMS
How do satellite cells aid in hypertrophy?
They donate their nucleus to the muscle cell which uses it to regenerate needed materials and causes a growth in cross sectional area.
Which type of cell has the greatest number of satellite cells surrounding it?
What increases during hypertrophy?
The number of myofibrils
What causes hypertrophy?
Immune system releases growth factors due to inflammation and they stim the satellite cell
why are men stronger than women?
Because they have a larger muscle mass
When does observable hypertrophy occur?
About 8 weeks after strength training