Exercise at Workplace for Manual Material Handling Workers

Not Applicable

• Conditions: Ergonomics; Manual Material Handling; Occupational Health
• Interventions: Other: Exercise at workplace - Four times per week; Other: Exercise at workplace - Three times per week

• Registration Number: NCT03597802
• Lead Sponsor: Universidade Cidade de Sao Paulo

Brief Summary

This study aim to evaluate the effectiveness of exercise at workplace for manual material handling workers. This is a randomized control trial study by cluster with three parallel groups (n=200). Participants will be randomized in three groups: (1) control group - will be receive ergonomics orientation . (2) Intervention group - exercise at workplace four times per week, during 15 minutes; (3) Intervention group 2 - exercise at workplace three times per week, during 15 minutes.Outcomes: The outcome measure will be verified in three moments at baseline, in six and eleven months of the intervention. The primary outcome is pain, electromyography. Secondary outcome is palmar dynamometer, BMI, physical activity level.

Detailed Description

Objective: This study aim to evaluate the effectiveness of exercise at workplace for control and prevention nonspecific low back pain. Methods: This is a randomized control trial study by cluster with three parallel groups. The context of this study is a motorcycle parts company importer localized in several states (Piaui, Ceará e Maranhão). The company has 575 workers, being 240 manual material handling. All are men over 18 years old that perform goods shipment (each work develop one this tasks - stock, separation, conference and packaging).

The inclusion criterial are workers that perform manual material handling for at least six months and signing informed consent form. The exclusion criterial were sick leave. The workers will be included with low back pain or no low back pain (at baseline). All will be interviewed to obtain: weight, height, BMI, age, marital status, educational level, and actual function (stock, separation, conference and packaging sick leave (the last 12 months), musculoskeletal complains, medications, complementary exams, surgery and or fractures. Participants will be randomized in three groups: (1) control group - will be receive orientation about manual material handling, postural and low back care (lecture and guidance). The training will be instructions according Ergonomics standard (NR17) about transportation and load handling and exercise in workout. (2) Intervention group 1 - will receive the same instruction of the control group, and will perform exercise at workplace four times per week, during 15 minutes; (3) Intervention group 2 - will be receive the same instruction of the control group, and will perform exercise at workplace three times per week, during 15 minutes. Outcomes: The outcome measure will be verified in three moments at baseline, six and eleven months of the intervention. The primary outcome is pain, electromyography. Secondary outcome is palmar dynamometer, BMI, exercise workout.

Expected Results: The manual material handling workers will be better after intervention by exercise at workplace. The effectiveness of exercise for low back pain and no low back pain groups will be contribute to change the behavior in occupational context.

Study Timeline

• Study First Submitted: 2018-04-29
• Study First Submitted QC: 2018-07-20
• Study First Posted: 2018-07-24
• Study Start: 2018-07-25
• Primary Completion: 2018-12-19
• Status Verified: 2019-04
• Last Update Submitted: 2019-04-16
• Last Update Posted: 2019-04-17
• Study Completion: 2020-12-17

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: Male
• Target Recruitment: 240

Inclusion Criteria

• The inclusion criterial are workers that perform manual material handling for at least six months and signing informed consent form.

Exclusion Criteria

• The exclusion criterial were sick leave

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Intervention group 1	Exercise at workplace - Four times per week	The workers will be receive orientation about manual material handling, postural and low back care (lecture and guidance), and will perform exercise at workplace three times per week, during 15 minutes
Intervention group 2	Exercise at workplace - Three times per week	The workers will be receive orientation about manual material handling, postural and low back care (lecture and guidance) and and will perform exercise at workplace four times per week, during 15 minutes.

Primary Outcome Measures

Name	Time	Method
Change from electromyographic signal at 6 months	At baseline and after six months	RMS (root mean square error) signal and peak signal by Electromyographic (EMG)
Change from Pain Intensity at 6 months	At baseline and after six months	Likert scale (0-10 points)

Secondary Outcome Measures

Name	Time	Method
Change from body mass index at 6 months	At baseline and after six months	The body mass index will be calculated on height divided by square weight
Change of behavior to exercise	At baseline and after six months	Practice of exercise (practice - yes or no; number of times per week)
Change from palmar grip strength at 6 months	At baseline and six months	Three measure palmar grip strength to use the mean by dynamometer

Trial Locations

Locations (1)

Rosimeire Simprini Padula; 🇧🇷 São Paulo, Brazil