Work Design Interventions for Older Workers During Consecutive Days in the Heat

NCT ID: NCT07046026

Last Updated: 2025-07-01

Basic Information

• Recruitment Status: NOT_YET_RECRUITING
• Clinical Phase: NA
• Total Enrollment: 32 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2028-09-30
• Study Completion Date: 2030-09-30

Brief Summary

The goal of this project is to compare different ways to schedule a workday to see if older workers should follow a specific work protocol to reduce strain on the heart and muscles across two consecutive days of work.

Participants will come to the lab a total of six times. During four of the visits participants will complete a box carrying task, simulating unloading a delivery truck. This will take place in a hot and humid room to simulate being outdoors during the summer.

Conditions

Hyperthermia; Fatigue; Heat; Work-Related Condition

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: PREVENTION
• Blinding Strategy: NONE

Study Groups

Standard work pace first

The order of the interventions is standard work pace first, followed by the rest trial second.

Group Type: ACTIVE_COMPARATOR

Standard work pace

Intervention Type: BEHAVIORAL

On two consecutive days, participants will work at a standard pace of one box per minute during the box carrying protocol

Additional rest breaks

Intervention Type: BEHAVIORAL

On two consecutive days, participants will work at the standard work pace during the box carrying protocol and have superimposed 5 minutes of rest every 30 minutes.

Additional rest breaks first

The order of the interventions is the additional rest breaks first and the standard work pace second.

Group Type: EXPERIMENTAL

Standard work pace

Intervention Type: BEHAVIORAL

On two consecutive days, participants will work at a standard pace of one box per minute during the box carrying protocol

Additional rest breaks

Intervention Type: BEHAVIORAL

On two consecutive days, participants will work at the standard work pace during the box carrying protocol and have superimposed 5 minutes of rest every 30 minutes.

Interventions

Standard work pace

On two consecutive days, participants will work at a standard pace of one box per minute during the box carrying protocol

Intervention Type: BEHAVIORAL

Additional rest breaks

On two consecutive days, participants will work at the standard work pace during the box carrying protocol and have superimposed 5 minutes of rest every 30 minutes.

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

• Healthy individuals
• 18-29 years old and 40-65 years old
• Completes at least 120 minutes of moderate to vigorous physical activity each week for at least the past 4 weeks
• Resistance trained or have recently held a job involving box carrying or a similar task

Exclusion Criteria

• History of cardiovascular, metabolic, respiratory, neural, or renal disease
• Hypertensive (systolic blood pressure > 139 mmHg or diastolic blood pressure > 89 mmHg) or tachycardic (resting heart rate > 100 bpm) during the screening visit
• Current nicotine use or previous use within the past 6 months
• Current of previous musculoskeletal injury limiting physical activity
• A positive pregnancy test at any point during the study
• Currently breastfeeding
• Study physician discretion based on any other medical condition or medication

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

State University of New York at Buffalo

OTHER

Sponsor Role: lead

Responsible Party

Riana Pryor

Principal Investigator

Responsibility Role: PRINCIPAL_INVESTIGATOR

Central Contacts

Riana Pryor

Role: CONTACT

rpryor@buffalo.edu

716-829-5456

Other Identifiers

STUDY00112234

Identifier Type: -

Identifier Source: org_study_id