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Backpacking is an increasingly popular outdoor recreational activity. The base pack weight (BPW) includes gear that is not consumed or worn on the body: shelter, sleep system, weather-proofing layers and personal gear to ensure a degree of comfort and safety. As such, reducing BPW is one of the most important tasks a backpacker manages when preparing for a trip. Available recommendations for ideal BPW are currently inconsistent, lack clear parameters, and rely on anecdotal evidence. The study aims to collect field data on perceived exertion and heart rate (HR) in relation to BPW during a day-long interval of hiking. Such findings can have implications on the cost and safety profiles extending from recreational backpacking to military and wilderness rescue operations.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| The Borg Rating of Perceived Exertion between 17 and 19 lb BPW | Active Comparator | Participants will be randomized to both 17 and 19 pounds for the first hike and the alternate condition for the second hike. A random number generator will create 1 block that includes 10 participants in each block to ensure comparable numbers to subjects starting at different base backpack weight. Participants assignments will then be included in a sealed manila envelopes. |
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| The Borg Rating of Perceived Exertion between 19 and 17 lb BPW | Active Comparator | Participants will be randomized to both 19 or 17 pounds for the first hike and the alternate condition for the second hike. A random number generator will create 1 block that includes 10 participants in each block to ensure comparable numbers to subjects starting at different base backpack weight. Participants assignments will then be included in a sealed manila envelopes. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| The Borg Rating of Perceived Exertion | Behavioral | Participants who satisfy the exclusion criteria and health assessment instrument are categorized in the lowest risk group for cardiac events and does not require medical screening for mild to moderate exercise per ACSM guidelines. |
| Measure | Description | Time Frame |
|---|---|---|
| The Borg Rating of Perceived Exertion During the Total Hike | Participants will report their perceived exertion towards the end of both hikes. The Borg Rating of Perceived Exertion scale ranges from 6 to 20. 6 being the lowest score of no exertion and 20 being the highest of maximal exertion. | 2 weeks |
| Measure | Description | Time Frame |
|---|---|---|
| Heart Rate | Difference between participants' heart rate during both 17 and 19 pound base backpack weight. | 2 weeks |
| The Borg Rating of Perceived Exertion During Incline and Decline Sections of the participant |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Susanne Spano, MD | University of California, San Francisco | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| UCSF Fresno | Fresno | California | 93703 | United States |
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Participants will report the perceived exertion mid-hike and towards the end. The Borg Rating of Perceived Exertion scale ranges from 6 to 20. 6 being the lowest score of no exertion and 20 being the highest of maximal exertion.
| 2 weeks |