Impact of booster breaks and computer prompts on sedentary time, body composition, stress perception, and occupational pain in desk-based workers: A quasi-experimental study - The UP project.

The Computer Prompts group showed a significant reduction in android fat mass compared to the control group.

• p = 0.007 with an effect size (Hedges' g) of -0.867
• Computer Prompts consisted of unguided 2-minute hourly breaks totaling 14-16 minutes per day
• The intervention lasted 12 weeks
• 61 desk-based workers were included across B-B, C-P, and control groups

The Booster Breaks group demonstrated significant increases in lean mass relative to the control group.

• p = 0.029 with an effect size (Hedges' g) of 0.952
• Booster Breaks consisted of guided 14-16 minute active breaks per day over 12 weeks
• Body composition was assessed using dual-energy X-ray absorptiometry (DXA)

The Booster Breaks group demonstrated significant increases in muscle mass relative to the control group.

• p = 0.016 with an effect size (Hedges' g) of 1.025
• Booster Breaks involved guided active breaks of 14-16 minutes per day
• Body composition was assessed using dual-energy X-ray absorptiometry (DXA)

Neither the Booster Breaks nor the Computer Prompts intervention produced significant differences in sedentary time compared to the control group.

• Sedentary time and physical activity were monitored via ActiGraph accelerometers
• Data were analyzed using ANCOVA with effect sizes estimated using Hedges' g
• No significant differences were found for sedentary time across any group comparison

Neither intervention produced significant differences in perceived stress or occupational pain compared to the control group.

• Stress was measured with the Perceived Stress Scale
• Occupational pain was assessed using the Nordic Musculoskeletal Questionnaire
• No significant differences were found for stress or occupational pain in either the B-B or C-P groups relative to controls

The study used a quasi-experimental design with 61 desk-based workers assigned to three groups over a 12-week intervention period.

• Groups were: Booster Breaks (B-B), Computer Prompts (C-P), and a control group
• B-B consisted of guided 14-16 minute active breaks; C-P involved unguided 2-minute hourly breaks totaling 14-16 minutes per day
• Body composition was assessed via dual-energy X-ray absorptiometry; sedentary behavior via ActiGraph accelerometers
• Data were analyzed using ANCOVA with Hedges' g used to estimate effect sizes