Final exam Flashcards
Body composition phenotype associated w aging
- Increased abdominal/visceral fat
- Decreased skeletal muscle
- Decreased subcutaneous
Inter-muscular fat
Visible muscle fat marbling that lies btwn muscle fibres
Old people have more inter-muscular fat
Issues with aging
- Abdominal obesity: increased insulin resistance, increased metabolic risk
- Decreased muscle mass: decreased mobility and function
Best exercise modality for elderly
A combination of resistance and aerobic exercise
- greatest reduction in visceral fat
- greatest improvement in insulin resistance
- improved CRF
- Improved function
NO WEIGHT LOSS -dont need weight loss to see benefit
Why does VO2 peak improve in the diet only group?
If you lose weight while maintaining VO2, your VO2 peak will increase bc activities such as going up the stairs are easier if you have less body weight, thereby improving your VO2 peak
RELATIVE VS ABSOLUTE
How do we measure individual response to exercise
- Standardized exercise
- Technical error
- Biological or day to day variability
Standardized exercise
All participants have the same relative dose and individuals are standardizing exercise to their capacity
ex. 65% of VO2 peak for one person may look different fir 65% of VO2 peak for another person
What are we controlling for with standardized exercised?
Exercise dose (amount and intensity)
Daily unstructured PA (activity outside of treatment
Differences in CRF/trait throughout the treatment
Calorie intake and composition of diet
Precision
If we took a bunch of people, measured their CRF on a MON and then again on a WED this is how we determine the range of technical error and therefore the precision
Biological or day to day variability
Comparing the variability of measured group to the variability of the control group
- If the SD is meaningfully diff btwn the variability of measured and control group, the variability can be attributable to exercise
