Effects of Weight Reduction on Sleep and Alertness in Long-distance Truck and Bus Drivers — SF-Truck  

Abdominal Obesity Clinical Trial

Official title: Effects of Weight Reduction and Lifestyle Changes on Sleep, Alertness and Cardiometabolic Risk Factors in Overweight Professional Long-distance Drivers

Status Completed

Clinical Trial Summary

The study is a year-long health-behaviour intervention in obese, male truck-drivers to lose weight moderately by 10%, using monthly individual counseling. The investigators hypothesize that lifestyle modification (increased physical activity, changes in eating habits, and improved schedule for sleep) through weight loss improves daytime alertness and quality of sleep, reduces daytime sleepiness, and improves cardiovascular risk factors and health-related fitness.

Clinical Trial Description

Daytime sleepiness, i.e., being fatigued at work is an important risk factor for traffic accidents involving commercial vehicles. Sleep-related disturbances and daytime fatigue may be partly related to obesity, which is common among truck drivers. This study is a randomised 12-month health-behaviour intervention in obese, male truck-drivers. We hypothesize that lifestyle modification (increased physical activity; decreased energy intake; and improved schedule for sleep), aimed to reduce weight moderately by 10%, improves daytime alertness and quality of sleep, reduces daytime sleepiness, and improves cardiometabolic health and health-related fitness. The primary aim is weight loss. We will recruit 140 participants aged 30—62 years and with abdominal obesity. The participants are randomised into an intervention (INT) and control (CON) group, for 12 months. The INT group gets individual lifestyle counseling monthly. After 12 months, the CON group receives weight-loss counseling for 3 months. Assessments (psychological vigilance test, sleep duration, dietary intake, physical activity, metabolic syndrome, health-related fitness) take place at months 0, 12 and 24. We expect to develop counseling strategies (leading to weight loss through changes in lifestyle) that can be used to improve sleep, alertness and cardiometabolic health in occupational health care. ;

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Abdominal Obesity
• Obesity, Abdominal
• Weight Loss

• NCT number: NCT00893646
• Study type: Interventional
• Source: UKK Institute
• Status: Completed
• Phase: N/A
• Start date: May 2009
• Completion date: January 2015