The efficacy of a technology-based system in a short-term behavioral weight loss intervention

Abstract

Objective: The objective was to examine the efficacy of adding a technology-based program to an in-person, behavioral weight loss intervention. Research Methods and Procedures: 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 Sense Wear 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 ≤ 0.05). Discussion: 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. Copyright © 2007 NAASO.