Workplace Intervention Including Exercise and Nutrition in Obese Office Workers

NCT07603141 | Enrolling By Invitation

• 1 other identifier: 1760
• Study Type: interventional
• Target: 40
• Locations: 1 country
• Sites: 1

Brief Summary

The main objective of this study is to investigate the efficacy of a 6-month workplace combined (exercise and nutrition) intervention in obese office workers, using a randomized controlled study. An additional objective of this study is to evaluate the individual responses per participant following the program.

Conditions

Obesity (BMI>30)

Keywords

occupational setting; wellness; physical activity; functional capacity; dietary habits; hy-dration

Outcome Measures

Primary Outcomes (11)

• Body fat

  Body fat (BF): BF% will be assessed using the bioelectrical impedance method (Maltron 900).

  Baseline and 6 months

• Body circumferences

  The waist and hip circumferences will be measured using an ergonomic circumference measuring tape (Seca 201).

  Baseline and 6 months

• Blood pressure

  Systolic and diastolic blood pressure will be measured, using an electronic upper arm blood pressure monitor (A\&D-UA-851).

  Baseline and 6 months

• Respiratory function

  Forced vital capacity (FVC) and forced expiratory volume in 1 s (FEV1) will be measured, using a portable spirometer (Micro, Medical, Micro).

  Baseline and 6 months

• Lipidemic profile

  A blood sample will be obtained after overnight fasting (12 h), as previously described \[37\]. Total cholesterol, high-density lipoprotein (HDL) and triglycerides will be determined using a biochemical analyzer (Clinical Chemistry Analyzer Z 1145; Zafiropoulos Diagnostica S.A., Koropi, Greece), and low-density lipoprotein (LDL) will be calculated using the Friedewald equation.

  Baseline and 6 months

• Lower body flexibility:

  The sit-and-reach test will be performed using a Flex-Tester box (Novel Products Inc., Rockton, IL, USA).

  Baseline and 6 months

• Static balance

  The single-limb stance test (with eyes opened) was performed, as previously described by Rinne et al.

  Baseline and 6 months

• Dynamic balance:

  The timed up-and-go test was performed, as previously described by Rikli and Jones.

  Baseline and 6 months

• Handgrip strength

  Maximal isometric handgrip strength will be assessed using a portable hydraulic dynamometer (Jamar 5030J1, Horsham, USA).

  Baseline and 6 months

• Aerobic capacity:

  The YMCA 3 min step test was used, which will be performed following the metronome cadence (96 beats per minute; 4 steps per cycle). The participants' HR will be measured 1 min following the termination of the step test.

  Baseline and 6 months

• Adherence to the Mediterranean diet

  The adherence to the Mediterranean diet will be assessed before and after the 6-month period using the specific Mediterranean Diet Score (range of total score: 0-55) \[34-35\]. The MedDietScore measures the weekly consumption of the following 9 food groups: non-refined cereals (whole grain bread and pasta, brown rice, etc), fruit, vegetables, legumes, potatoes, fish, red meat and products, poultry, full fat dairy products (like cheese, yoghurt, milk), as well as olive oil and alcohol intake \[35\].

  Baseline and 6 months

Study Arms (2)

Intervention group

EXPERIMENTAL

The IG will participate in a daily supervised 6-month workplace program (during working hours) including: a. exercise (flexibility, balance, strength, aerobic), and b. counseling and educational activities for healthy diet and hydration.

Other: Workplace combined (exercise and nutrition) intervention

Control group

NO INTERVENTION

The CG did not participate in any intervention.

Interventions

Workplace combined (exercise and nutrition) intervention OTHER

The IG will participate in a supervised 6-month combined intervention program (exercise and nutrition), which will take place inside the workplace settings during working hours. In more detail, the IG will participate, every working day (5 days/week), in a 6-month supervised combined chair-based exercise program (120 training sessions; 25-40 min/day), including chair based seated and chair-assisted standing exercises to improve flexibility, balance, strength and aerobic capacity. Except exercise, the intervention program consisted of weekly counseling and educational activities in healthy diet and proper hydration using presentations, leaflets, individual and group sessions with nutritionist, use of applications for proper hydration, use of goal-setting cards for healthy options

Intervention group

Eligibility Criteria

• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)

You may qualify if:

• In more detail, the participants: 1) should have at least 8 h per day in the office, 2) should have BMI value ≥ 30 kg/m2, 3) should not have chronic diseases (physical or mental), 4) should not use any medication, 5) should not have injuries (in lower or upper body) the last 6 months and 6) should not participate in organized exercise programs or nutrition intervention during the last 6 months.

Sponsors & Collaborators

• University of Thessaly: lead

Study Sites (1)

Department of Physical Education and Sports Science, University of Thessaly

Trikala, Greece, 42100, Greece

Location

MeSH Terms

Conditions

Obesity; Motor Activity; Feeding Behavior

Interventions

Exercise; Nutritional Status; Methods

Condition Hierarchy (Ancestors)

Overweight; Overnutrition; Nutrition Disorders; Nutritional and Metabolic Diseases; Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms; Behavior; Behavior, Animal

Intervention Hierarchy (Ancestors)

Motor Activity; Movement; Musculoskeletal Physiological Phenomena; Musculoskeletal and Neural Physiological Phenomena; Nutritional Physiological Phenomena; Diet, Food, and Nutrition; Physiological Phenomena; Health Status; Demography; Population Characteristics; Investigative Techniques

Study Officials

• Konstantina Karatrantou

  University of Thessaly

  PRINCIPAL INVESTIGATOR

• Vassilis Gerodimos

  University of Thessaly

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: INVESTIGATOR
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Associate Proffessor at Department of Physical Education and Sports Science of the University of Thessaly

Study Record Dates

• First Submitted: May 11, 2026
• First Posted: May 22, 2026
• Study Start (Estimated): June 30, 2026
• Primary Completion (Estimated): July 30, 2026
• Study Completion (Estimated): February 28, 2027
• Last Updated: May 22, 2026

Record last verified: 2026-05

Locations

GR (1)