NCT06886503

Effects of Inspiratory Muscle Warm-up on Respiratory Variables, Physiological Indices, and 400-meter Performance in Elite Male Runners - Randomized Crossover Trial

Completed NA Last updated 20 March 2025

What this trial tests

NA trial testing Inspiratory Warm-Up - 60% MIP in Athletic Performance in 14 participants. Completed in 30 January 2025.

Timeline

1 December 2024

Primary endpoint
30 January 2025

30 January 2025

Quick facts

Lead sponsor	Institute of Sport - National Research Institute, Poland
Phase	NA
Status	Completed
Study type	INTERVENTIONAL
Allocation	randomized
Design	crossover
Masking	single
Primary purpose	other
Enrollment	14
Start date	1 December 2024
Primary completion	30 January 2025
Estimated completion	30 January 2025
Sites	1 location across Turkey (Türkiye)

Drugs / interventions tested

• Inspiratory Warm-Up - 60% MIP
• Inspiratory Warm-up - 40% MIP
• Sham

Conditions studied

• Athletic Performance — all drugs for Athletic Performance →

Sponsor

Institute of Sport - National Research Institute, Poland

Who can join

Adults 18 to 35, male only, with Athletic Performance. Patients with the condition only — healthy volunteers not accepted.

Sponsor's own description

A single-blind, randomized crossover design was employed in this study. Two days before the study commenced, all participants were provided with detailed information about the warm-up protocols and tests to be conducted. Participants were brought to the standardized 400m-track for measurements a total of four times, with one-week intervals, beginning two days after the initial familiarization and information session. They were required not to perform any strenuous training and avoid long travels during 24 hours before the testing sessions. They were told to abstain from food intake for 3 hours before the protocol and avoid alcohol and caffeine for at least 24 hours prior to testing to ensure controlled conditions. The participants underwent four different warm-up protocols in a randomized order: one consisting of an athletic warm-up alone and three incorporating an inspiratory muscle warm-up at varying intensities in addition to the athletic warm-up. All warm-up protocols were administered one week apart, on the same day of the microcycle and at the same time, under relevant supervision. Various measurements were conducted at specific time points to assess physiological responses within each warm-up protocol. Accordingly, MIP and maximal expiratory pressure (MEP) tests were performed at the following time points: pre-warm-up, post-warm-up (pre-run), post-400-meter sprint, and at 1, 3, and 5 minutes after the run to evaluate inspiratory and expiratory muscle strength. Additionally, the Peak Inspiratory Flow Rate (PIFR) test was performed to determine inspiratory flow rate, and the Inhaled Volume (IV) test was conducted to measure the volume of air inhaled during inspiration. To objectively assess the effects of the warm-up protocols on sprint intensity and the recovery process, blood lactate testing was conducted. Furthermore, to monitor cardiovascular responses, heart rate measurements were recorded before the run, immediately after the 400-meter sprint, and at 1, 3, and 5 minutes post-run.

Publications & conference data

1 peer-reviewed publication reference this trial (live from Europe PMC):

1. Inspiratory muscle warm up improves 400 m performance in elite male runners.
   Yilmaz YA, Tosun MI, Demirkan E, Can S, et al · · 2025 · PMID 40775048 · DOI 10.1038/s41598-025-14797-0