PPT 6 Flashcards
What is the gold standard of research design for testing hypothesis
randomized controlled trials
do randomized controlled trials randomly assign the participants in the experimental and control groups
yes
Randomized controlled trials: are measurements made before and after intervention
yes
What does randomization ensure with the experimental and control groups
Ensures that the exp and control groups are comparable with respect to all factors (known or unknown)
- except for the factors addressed by the exp intervention
What are the 5 challenges to RCT
1- motivation to participants if not randomized to intervention 2- double blind 3- biases poor compliance, dropout 4- external validity 5- practicality with larger samples
What does HEARTY stand for
Healthy eating
aerobic and resistance training in youth
HEARTY participants
- amount
- age
- criteria
- obesity BMI / overweight
- PA
- 304 ado
- 14-18 yrs
- post pubertal
- obesity bmi > 95th
- Overweight bmi 85-95th with diabetes risk factor
- PA < 2 weekly ET of > 20 mins each
Timeline run in weeks?
1-4
timeline intervention weeks
5-26 weeks
3-6 mo
HEARTY randomization in 4 groups
1- aerobic
2- resistance
3- combined
4- control only diet
hearty 6 variables assessed with their methods
1- body comp = MRI
2- Anthropometry= weight, height, waist, hip
3- RMR= indirect calo
4- CRF= indirect cal
5- MusculoF= 8-RM, CSEP
6- CVD risk factors= fasting blood measures, OGTT
MRI analysis used what software and primary outcome
slice-o-matic software v 4.3
% body fat
MRI analysis consisted of 4 factors
pixels
area
volume
mass
FITT for aerobic ET
F= 4x/week I = 65-85% HRmax T= treadmill, bike, elliptical T= 15-45mins
FITT Resistance ET
F= 4x/week I= 1-3 sets, 15 RM T= machine, dumbbells T= 20-45 mins
Results of Hearty primary outcome
- % body fat
- CVD risk markers
Results for Cardiorespiratory & Musculoskeletal Fitness. Aerobic ET
aerobic exercise training alone increased abdominal muscular endurance
Results for Cardiorespiratory & Musculoskeletal Fitness.. RT
increased upper and lower body muscular strength and endurance
Results for Cardiorespiratory & Musculoskeletal Fitness. Combined group
greatest improvements in overall strength and fitness were demonstrated by
combined
No changes in 3 things compared to controls
grip strength
sit and reach
vertical power
Conclusion for aerobic + RT and body fat
largest decrease in body fat and waist
Conclusion for aerobic + RT in CRF and MSKF
increase for both
Is combine training superior to aerobic training alone
yes
Greater reductions in body fat, BMI, waist, muscular strength & endurance
does the media distort research results
YES
Which group had the highest drop out rate and what was the reason for the drop outs
The resistance training group had the most drop outs and the main reason for the drop out was self conscious and depressions a lot of mental health predictors
What is the adherence rate in adults
50% discontinue within 6 months
