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Physically demanding occupations (PDO) require high levels of energy expenditure, mental acuity, and technical skills. Sometimes this work is performed in extreme environments during hot/humid summer months. Previous research shows that dehydration and heat stress can increase risk of heat-related illness, reduced cognitive function, and work capacity. While this impact of physically demanding work in extreme environmental conditions is often studied in firefighters, military personnel, and athletes, and even agricultural workers, manufacturing and warehouse workers ("the industrial athlete") are underrepresented in the literature.
The purpose of the study is to examine the impact hydration status of the industrial athlete (i.e., frontline manufacturing and warehouse workers at PepsiCo facilities) prior to, during, and after their shift over a typical work week has on work performance.
Note: Recruitment is limited to PepsiCo Frontline Employees Only. Do not contact study official for enrollment.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Observational | PepsiCo Frontline Workers |
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| Measure | Description | Time Frame |
|---|---|---|
| Acute Urine Specific Gravity | USG digital pen refractometer (au) | Post-shift USG compared to pre-shift USG (8-12 hours from baseline) on consecutive test day 1-4 over calendar week. |
| Chronic Urine Specific Gravity | Digital pen refractometer (au) | pre- and post- 8-12 hour shift USG on the last test day compared to pre- and post-8-12 hour shift USGs at baseline. Over 4 consecutive test days during a calendar week. |
| Measure | Description | Time Frame |
|---|---|---|
| Urine Color | 1=most dilute to 7= least dilute | 15 minutes pre- 9-12 hour shift and 15 minutes post- 8-12 hour shift, consecutive test day 1-4 over a calendar week. |
| Body Weight | (kg) |
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Inclusion Criteria:
Exclusion Criteria:
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Frontline manufacturing and warehouse workers at Orlando PBNA Bottling Facility
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| Name | Affiliation | Role |
|---|---|---|
| Philip Agostinelli, PhD | PepsiCo R&D/Gatorade and Sports Science Institute | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Gatorade Sports Science Institute | Bradenton | Florida | 34210 | United States |
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| 15 minute pre- 8-12 hour shift on the first test day |
| Sweat Loss | (mL) monitored using the Epicore Connected Hydration device | over the course of an 8-12 hour shift, consecutive test day 2-4 over a calendar week. |
| Sweat Rate | (mL/hr) monitored using the Epicore Connected Hydration device | over the course of an 8-12 hour shift, consecutive test day 2-4 over a calendar week. |
| Sodium Concentrations | (g/L) monitored using the Epicore Connected Hydration device | over the course of an 8-12 hour shift, consecutive test day 2-4 over a calendar week. |
| Sodium Loss | (g) monitored using the Epicore Connected Hydration device | over the course of an 8-12 hour shift, consecutive test day 2-4 over a calendar week. |
| Fluid Intake | (g) pre-shift bottle weight before and after filled with water compared to pre- and post-refill bottle weight. | Each time water bottle is refilled over 8-12 hour shift, consecutive test day 1-4 over a calendar week. |
| Measurment of physical activity and movement (Accelerometry) | Assessed using the LifeBooster Senz devices. Device measures frequency and severity of movements and posture. | over the course of an 8-12 hour shift, consecutive test day 2-4 over a calendar week. |
| work-to-rest ratio | Assessed using the LifeBooster Senz devices. Device measures frequency and severity of movements and posture. | over the course of an 8-12 hour shift, consecutive test day 2-4 over a calendar week. |
| Mental and Physical Energy and Fatigue | Visual Analog Scale (VAS): 6 questions to describe capacity for physical activity anchored from No to Strongest Feelings and 6 questions describe capacity for mental activity anchored from No to Strongest Feelings. | 30 minutes pre- and 30 minutes post- 8-12 hour shift on consecutive test day 1-4, over a calendar week |
| Thirst | Visual Analog Scale- 6 questions: 4 questions are anchored from not at all or none to very, and 2 questions are anchored from pleasant to unpleasant. | 30 minutes pre- and 30 minutes post- 8-12 hour shift on consecutive test day 1-4, over a calendar week |
| Prior Night Sleep Quality | Pittsburgh Sleep Quality Index (PSQI). Measures sleep quality through seven areas: subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleep medication, and daytime dysfunction over the last month. Score of the PSQI ranges from 0 to 3, with 3 indicating the greatest dysfunction or disturbance. The seven component scores are then summed to obtain a global PSQI score, which ranges from 0 to 21. Higher scores indicate poorer sleep quality, with a score greater than 5 suggesting significant sleep difficulties | 30 minutes pre- 8-12 hour shift on consecutive test day 1-4, over a calendar week |