Abdominal Obesity
Conditions
Keywords
abdominal obesity, weight reduction, diet, exercise training, lifestyle activity, health-related fitness, walking, actigraphy, lifestyle modification, sleep, sleep hygiene, alertness, daytime sleepiness, metabolic syndrome, counselling, health education, truck drivers, bus drivers, randomized controlled trial
Brief 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.
Detailed 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.
Interventions
BEHAVIORALweight loss counseling
individual monthly lifestyle counseling, face-to-face (6 times, each 45 min) and by telephone (7 times, each 30 min), on how to decrease energy intake and change eating habits to improve quality of dietary fat and carbohydrate, how to increase daily walking steps; and how to improve sleep quality (sleep hygienic tips)
Sponsors
Academy of Finland
Finnish Institute of Occupational Health
Vitalmed Research Centre
UKK Institute
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
MALE
Age
30 Years to 62 Years
Healthy volunteers
Yes
Inclusion criteria
* male * age 30-62 years * long-distance truck or bus driver (on average continuous driving for at least one hour daily outside the city center) * irregular working hours (on average at least once weekly between 0600-1800 hours) * waist circumference at least 100 cm * sedentary: leisure physical activity no more than 30 minutes twice weekly at moderate intensity, and no medical contraindications to increase physical activity
Exclusion criteria
* no moderate or severe sleep apnoea with CPAP therapy or with previous surgical operations in the neck area (e.g., UPPP) * no regular use of sleeping medicines (on average not more often than once weekly) * no severe sleep disorder * greatly elevated resting blood pressure (\> 180/120 mmHg) * no diabetes mellitus with medication
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| body weight | 12 months |
Secondary
| Measure | Time frame |
|---|---|
| sleep duration | 12 months |
| alertness (ability to stay awake) | 12 months |
| occurrence of metabolic syndrome | 12 months |
| health-related fitness | 12 months |
Countries
Finland
Outcome results
None listed