AND SOLUTIONS GRADED A+
✔✔threshold for health benefits - ✔✔minimum level of exercise/pa to see health benefit
150 mins of moderate intensity
75 mins of vigorous intensity
30 mins most days
✔✔Barriers to physical activity - ✔✔-lack of time
-social and environmental influence
-inadequate resources
-lack of motivation and commitment #1
*50% adherence rate to PA and Ex over 6 months
✔✔CRE - ✔✔is the ability to perform aerobic exercise for a prolonged period of time
-benefits are wide, but include:
increase EE, weight loss, decreased CVD risk
✔✔Vo2 - ✔✔gold standard measurement of CRE
- the maximal amount of O2 the body can consume and utilize during exercise
most valid measurement of cardiorespiratory fitness
✔✔Heart - ✔✔2 pumps in 1
right side: pumps oxygen depleted blood to the lungs (pulmonary circuit)
left side: pumps oxygen rich blood to tissues throughout the body (systemic circuit)
✔✔Circulatory system blood vessels - ✔✔arteries: carry oxygen rich blood away from
the heart
veins: carry oxygen depleted blood from the body tissues back to the heart
exception: pulmonary artery and pulmonary vein
✔✔the respiratory system - ✔✔lungs
exhalation-carbon dioxide is release from the air
inhalation-oxygen enters the lungs
alveoli- tiny air sacs which allow for rapid gaseous exchange
-rapid gas diffusion
✔✔ATP (adenosine triphosphate) - ✔✔energy released from the breakdown of food is
used to make a biochemical compound called
, ✔✔2 "systems" to produce ATP - ✔✔1. anaerobic systems (WITHOUT OXYGEN)
2. aerobic systems (WITH OXYGEN) primary systems for developing CRE
✔✔anaerobic energy production - ✔✔high energy phosphates: first to make ATP,
Fastest to make ATP, and First to run out
-ATP-PC system
ATP- store small amounts (few secs of energy)
PCr (phosphocreatine)- 5-10 secs of energy
✔✔anaerobic energy production
Glycolysis - ✔✔a process that breaks down carbohydrates (CHO) in cells
✔✔2 main ways CHO are supplied to muscles - ✔✔blood glucose
glycogen (storage of glucose)
most anaerobic ATP production comes from Glycolysis
produces quick energy AFTER ATP-PC system for intense exercise under 2 mins
✔✔2 main products of glycolysis - ✔✔ATP (2)
lactic acid
✔✔Aerobic Energy Production - ✔✔1 min, aerobic ATP production increases and
anaerobic ATP production decreases
requires oxygen to make ATP
CHO, Fats & Proteins can be used to produce ATP
✔✔Anaerobic dominates - ✔✔short term
✔✔aerobic dominates - ✔✔long term
✔✔Acute responses to Aerobic Exercise - ✔✔short term/acute changes to exercise
as you exercise the deman for oxygen increases to keep energy production going
✔✔long-term adaptations to aerobic exercise - ✔✔adaptations=changes over time that
accrue with regular exercise
✔✔higher VO2 max - ✔✔lower chance of developing Cardiovascular disease
✔✔Evaluating CRE
Field tests: - ✔✔1.5 miles run
2 mile run
1 mile walk
6 min walk