Transcript WARM UP 2/13

WARM UP 2/12
Quiz yourself
Shuffle your cards and put them in order –
then flip them over and see how many you
got wrong. Write your score on your warm
up.
QUIZ ON THESE FRIDAY
NOTES Ch 8 2/12
Exercise and muscle fatigue
2 types of exercise:
1. AEROBIC
2. RESISTANCE
AEROBIC
Endurance exercising; does not increase much
muscle size
EX: running, biking, swimming, etc.
RESULTS
1.
2.
3.
Stronger muscles
More flexible
Greater resistance to fatigue
DUE TO
1. Increase in blood supply to muscles (so more
O2)
2. Muscle fibers make more mitochondria (so store
more energy)
Other benefits of aerobic:
Better coordination
Stronger bones
More efficient lungs
Better metabolism
Improved digestion
Larger, stronger heart (more blood each
pump)
RESISTANCE EXERCISE
Muscles worked with an immovable
(isometric) or heavy object
EX: lifting weights
RESULTS
Larger muscles
2. More strength
1.
DUE TO
Enlargement of muscle fibers
(more actin, myosin, and connective tissues)
**NOT gain more cells
During this type of exercise, there are
microscopic tears in the muscle. After
working out MUST take two or three days
off to let muscle heal and rebuild. This
makes muscle stronger. Without rest time,
only hurt muscle and no longer build it.
MUSCLE FATIGUE
Muscles unable to contract even when
stimulate
DUE TO
Not being able to take in O2 fast enough for
what muscles are using
When muscles lack O2 – lactic acid
accumulates – this stops contractions
Lactic acid causes burning feeling, soreness
What to do
Slow down activity
Breathe deep full breaths
O2 will lessen the lactic acid
REGULAR EXERCISE
Increase in exercise causes more efficient
use of O2, more blood supply to muscles,
and less fatigue
(can work out longer)
*Remember heart is a muscle- need to do
things to work it out also!
Each group answer - staple to lab
Write what PARTs were aerobic exercise.
2.
Write what PARTs were resistance exercise.
3.
What caused the burning feeling in PART II?
4.
What would happen to your heart rate after exercising in
PART VII if you worked out all the time?
5.
Why do you breathe hard after exercising?
6. What hand is stronger in PART I: why do you think?
7. How healthy are you?
a. Beats after exercise: good strong heart: 116 or less average
117-128; need more exercise: 130+
b.
Part II : great – 1 + minute; average 35sec-1minute;
need more exercise less than 35
c.
Part III: great – 30+; average 23-29; need more exercise
less than 24
d.
Part IV: great 35+; average 26-34; need more exercise :
less than 26
1.