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Supplemental feedings increase self-selected work output during wildfire suppression.

John S Cuddy1, Steven E Gaskill, Brian J Sharkey

  • 1Human Performance Laboratory, The University of Montana, Missoula, MT 59812-1825, USA.

Medicine and Science in Sports and Exercise
|June 5, 2007
PubMed
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Supplemental carbohydrate (CHO) intake and regular meals boost firefighter work rates during wildland fire suppression. These feeding strategies enhance self-selected activity, especially in the later hours of demanding work shifts.

Area of Science:

  • Sports Nutrition
  • Occupational Physiology
  • Wildland Firefighting

Background:

  • Wildland firefighters face strenuous physical demands.
  • Nutritional strategies are crucial for maintaining performance during prolonged work.
  • Understanding the impact of feeding on activity levels is vital for operational efficiency.

Purpose of the Study:

  • To evaluate the effect of different supplemental feeding strategies on self-selected activity levels in wildland firefighters.
  • To determine if carbohydrate (CHO) intake influences work output during fire suppression.
  • To compare the efficacy of liquid, solid, and intermittent feeding schedules.

Main Methods:

  • Seventy-six firefighters participated in three seasons of experiments.
  • Interventions included liquid carbohydrate (CHO) or placebo, combined liquid and solid CHO, and regular shift feeding versus sack lunches.

Related Experiment Videos

  • Work output was objectively measured using actigraphy units (CSA and MiniMitter).

    • Main Results:

    • Liquid CHO intake significantly increased overall daily activity counts compared to placebo.
    • Combined liquid and solid CHO intake elevated activity levels during specific periods of the workday.
    • Regularly spaced shift foods, compared to a single sack lunch, improved activity in the final work hours.

    Conclusions:

    • Supplemental carbohydrate intake, whether liquid or solid, enhances self-selected work rates in wildland firefighters.
    • Regularly timed feedings are more effective than a single meal for sustaining performance throughout the workday.
    • Optimized nutrition can improve firefighter endurance and productivity during demanding suppression efforts.