The efficacy of a technology-based system in a short-term behavioral weight loss intervention.
OBJECTIVE
The objective was to examine the efficacy of adding a technology-based program to an in-person, behavioral weight loss intervention.


METHODS
Fifty-seven subjects (BMI=33.1+/-2.8 kg/m2; age=41.3+/-8.7 years) participated in a 12-week intervention with random assignment to Standard In-Person Behavioral Weight Control Program (SBWP) or Intermittent or Continuous Technology-Based Program (INT-TECH, CON-TECH). SBWP subjects received seven individualized weight loss sessions encouraging dietary and exercise modifications. INT-TECH and CON-TECH subjects received all SBWP components; additionally, these groups used a SenseWear Pro Armband (BodyMedia, Inc.) to monitor energy expenditure and an Internet-based program to monitor eating behaviors. These features were used by INT-TECH subjects during weeks 1, 5, and 9 and CON-TECH subjects weekly throughout the intervention.


RESULTS
Intent-to-treat analysis revealed weight loss of 4.1+/-2.8 kg, 3.4+/-3.4 kg, and 6.2+/-4.0 kg, for SBWP, INT-TECH, and CON-TECH groups, respectively (CON-TECH>INT-TECH, p<or=0.05).


CONCLUSIONS
These results indicate that the technology-based program needs to be used continuously throughout the intervention period to significantly impact weight loss. Future studies should examine the long-term and independent effect of this technology on weight loss, and for whom this intervention format is most effective.
Polzien
Kristen M
KM
Physical Activity and Weight Management Research Center, University of Pittsburgh, Department of Health and Physical Activity, 140 Trees Hall, Pittsburgh, PA 15261, USA.
Jakicic
John M
JM
Tate
Deborah F
DF
Otto
Amy D
AD
D000293:Adolescent; D000328:Adult; D001521:Behavior Therapy / Q000379:methods*; D015992:Body Mass Index; D001835:Body Weight; D004038:Diet, Reducing / Q000379:methods*; D015444:Exercise; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D020407:Internet; D008297:Male; D008875:Middle Aged; D018670:Monitoring, Ambulatory / Q000379:methods*; D013672:Technology / Q000379:methods*; D015431:Weight Loss