The Effects of Nutritional Supplementation on Occupational Performance in Firefighters

Not Applicable

Completed

• Conditions: Fatigue
• Interventions: Dietary Supplement: Creatine Monohydrate; Dietary Supplement: Control

• Registration Number: NCT06172543
• Lead Sponsor: Ward Dobbs

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Study Start: 2023-03-01
• Primary Completion: 2023-08-01
• Study Completion: 2023-08-01
• Study First Submitted: 2023-11-22
• Status Verified: 2023-12
• Study First Submitted QC: 2023-12-06
• Last Update Submitted: 2023-12-06
• Study First Posted: 2023-12-15
• Last Update Posted: 2023-12-15

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 30

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.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Creatine Monohydrate Group	Creatine Monohydrate	25 grams of Whey Protein Isolate + 25 grams of Carbohydrate Powder + 5 grams of Creatine
Non Creatine Group	Control	25 grams of Whey Protein Isolate + 25 grams of Carbohydrate Powder only

Primary Outcome Measures

Name	Time	Method
Time Trial	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).
Time to completion	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.

Trial Locations

Locations (1)

Fire Department; 🇺🇸 La Crosse, Wisconsin, United States