About this trial
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.
Eligibility criteria
Qualifiers
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
Disqualifiers
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
Trial design
Treatments tested in this trial
- Standard work pace
- Additional rest breaks