title: Multicomponent intervention to reduce daily sedentary time: a randomised controlled trial.
abstract: OBJECTIVE
  To test the efficacy of a multicomponent technology intervention for reducing daily sedentary time and improving cardiometabolic disease risk among sedentary, overweight university employees.
  
  
  METHODS
  Blinded, randomised controlled trial.
  
  
  METHODS
  A large south-eastern university in the USA.
  
  
  METHODS
  49 middle-aged, primarily female, sedentary and overweight adults working in sedentary jobs enrolled in the study. A total of 40 participants completed the study.
  
  
  METHODS
  Participants were randomised to either: (1) an intervention group (N=23; 47.6+9.9 years; 94.1% female; 33.2+4.5 kg/m(2)); (2) or wait-list control group (N=17; 42.6+8.9 years; 86.9% female; 31.7+4.9 kg/m(2)). The intervention group received a theory-based, internet-delivered programme, a portable pedal machine at work and a pedometer for 12 weeks. The wait-list control group maintained their behaviours for 12 weeks.
  
  
  METHODS
  Primary (sedentary and physical activity behaviour measured objectively through StepWatch) and secondary (heart rate, blood pressure, height, weight, waist circumference, per cent body fat, cardiorespiratory fitness, fasting lipids) outcomes were measured at baseline and postintervention (12 weeks). Exploratory outcomes including intervention compliance and process evaluation measures were also assessed postintervention.
  
  
  RESULTS
  Compared to controls, the intervention group reduced daily sedentary time (mean change (95%CI): -58.7 min/day (-118.4 to 0.99; p<0.01)) after adjusting for baseline values and monitor wear time. Intervention participants logged on to the website 71.3% of all intervention days, used the pedal machine 37.7% of all working intervention days and pedalled an average of 31.1 min/day.
  
  
  CONCLUSIONS
  These findings suggest that the intervention was engaging and resulted in reductions in daily sedentary time among full-time sedentary employees. These findings hold public health significance due to the growing number of sedentary jobs and the potential of these technologies in large-scale worksite programmes.
  
  
  BACKGROUND
  ClinicalTrials.gov #NCT01371084.
authors.affiliation: Department of Health and Human Physiology, University of Iowa, Iowa City, Iowa, USA.
authors.forename: Lucas J
authors.initials: LJ
authors.lastname: Carr
authors.forename: Kristina
authors.initials: K
authors.lastname: Karvinen
authors.forename: Mallory
authors.initials: M
authors.lastname: Peavler
authors.forename: Rebecca
authors.initials: R
authors.lastname: Smith
authors.forename: Kayla
authors.initials: K
authors.lastname: Cangelosi
keywords: sedentary; technology; worksite