421 Final: PA Benefits/Recommendations

Question 0

Harvard Alumni 1986 (before redesign)

Answer 0

Expending > 2000 kcals/week in leisure PA extends lifespan

• the more PA done = dec. risk
• too much of a good thing = negative
• doesn’t account for change in BEH, SUB

Question 1

Harvard Alumni Study 1993 (after redesign)

Answer 1

• account for change in BEH, SUB
• PA at one point is better than none
• unfit to fit = greatest dec. risk (27%)
• fit to unfit = inc. risk (15%)
• always active = dec. risk (23%)

Question 2

ACLS: Steven Blair (before redesign)

Answer 2

• advocates ‘Fit vs. Fat’ in relation to all cause mortality
• better to be fit and OVW than normal weight and unfit ( inc. RR for mortality)

Question 3

ACLS (after redesign)

Answer 3

• dec. mortality risk for those that maintained/improved fitness
• benefits seen in healthy and unhealthy, across all age groups
• shows same RR for people going from fit to unfit as people from unfit to fit
• being or becoming fit at some point is protective against CVD

Question 4

Physical Activity

Answer 4

Bodily movement that is produced by the contraction of skeletal muscles that significantly increases energy expenditure

Question 5

Absolute Intensity

Answer 5

General measurement of intensity applied to anyone

• MET
• kcals

Question 6

Physical Fitness

Answer 6

A set of attributes that people have or achieve that relates to the ability to perform PA

Question 7

Relative Intensity

Answer 7

Intensity specific to fitness level

- treadmill speed, VO2max

Question 8

Dose-Response Relationship

Answer 8

More PA is better to bring about health benefits, up to a point (plateaus)

Question 9

PA Guidelines for Americans (2008)

Answer 9

**avoid inactivity             Additional benefits:
MOD: 150 min/wk           300 min/wk
VIG: 75 min/wk                150 min/wk
- 10 min bouts during week
- m. Strength = 2 d/wk

Question 10

ACSM/AHA recommendations ( to promote/maintain health)

Answer 10

MOD: 30 min 5d/wk
VIG: 20 min 3d/wk
Combo
MS/ME: 2d/wk

Question 11

Exercise

Answer 11

• Subclass of PA
• planned, structured, and repetitive bodily movements done to improve or maintain one or more components of physical fitness

Question 12

Benefits of Regular PA ( improvement in CV and pulmonary function)

Answer 12

Inc. VO2max
Dec minute ventilation = more efficient
Dec myocardial O2 cost
Dec HR and BP
Inc exercise threshold for onset of lactate and disease signs/symptoms

Question 13

Benefits of Regular PA (reductions in CVD and RF)- think risk factors

Answer 13

Inc. HDL- removal of cholesterol

Dec: resting BP, BF and abdominal fat, clotting, and inflammation

Question 14

What is the main difference between the ACLS and Harvard studies?

Answer 14

ACLS = OBJ assessment- treadmill time
Harvard = SUBJ assessment- questionnaires