Skip to main content
OpenTrials
Completed

NCT Number: NCT06172543

The Effects of Nutritional Supplementation on Occupational Performance in Firefighters

The purpose of this study was to assess the usefulness of protein and carbohydrate supplementation, with and without creatine, on occupational performance in firefighters. Research has examined the effects of adding creatine to whey protein and carbohydrates on training adaptations in resistance-trained individuals with mixed finding.

Furthermore, the ergogenic benefit of protein and carbohydrate supplementation, with or without creatine, in firefighters is largely unknown. Therefore, the primary aim of the current study was to examine the effects of protein and carbohydrate supplementation, with or without creatine, on occupational performance in firefighters.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Fatigue Pathological Conditions, Signs and Symptoms Signs and Symptoms

Age range

18 year–55 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Fire Department

La Crosse, Wisconsin, 54601, United States

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Being a firefighter between the ages of 18-55 years of age, and medically cleared for field duty.

Exclusion criteria

  • Any current musculoskeletal or neurological condition that would prohibit the completion of performance testing.

Treatment and study plan

Creatine Monohydrate

Dietary Supplement

Participants were assigned to ingest a single serving daily of either A) a 25-gram dose of whey protein isolate + 25-gram dose of carbohydrate powder (ProCarb); or B) a 25-gram dose of Whey Protein Isolate + 25-gram dose of carbohydrate powder + 5-gram dose of creatine monohydrate (Creatine) for a 17-21-day period.

Control

Dietary Supplement

A 25-gram dose of whey protein isolate + 25-gram dose of carbohydrate powder (ProCarb)

Primary outcomes

  1. Time to completion

    Time frame: 24 Days

    Time to completion for tasks including a hose carry, body drag, stair climb, and forcible entry (Keiser sled hammer) for time. For the hose carry, firefighters advanced a 30.48 m section of a charged 4.45 cm hose line over a distance of 30.5 m in a straight line before flowing water for 2 seconds. Rescue consisted of firefighters being instructed to grasp a mannequin (mass 50 kg, height: 180 cm) underneath the shoulders using a "seatbelt" grip and dragging the mannequin 30.5 m backward. This test is known as the body drag. Stair climb consisted of climbing four flights of stairs and returning to the bottom as quickly as possible. In the forcible entry, firefighters struck a simulated forcible entry chopping device (Keiser FORCE Machine, Keiser Co., USA) using a 3.6 kg sledgehammer until completed. The total time to complete each task was recorded, in addition to the total completion time for all tasks summed together.

  2. Time Trial

    Time frame: 24 Days

    A maximal effort, 3.5 km time trial on an air-braked cycle ergometer (Assault Bike, As-sault Fitness Products, Carlsbad, CA, USA).

Sponsors and collaborators

Lead sponsor

Ward Dobbs

Other

Collaborators

  • Des Moines University
  • Lindenwood University
  • Mayo Clinic

Registry information

Official study title

The Effects of Protein and Carbohydrate Supplementation, With and Without Creatine, on Occupational Performance in Firefighters

Important dates

Study start
2023
Primary completion
2023
Study completion
2023
First posted
Dec 15, 2023
Registry last updated
Dec 15, 2023

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.