ACUTE EFFECTS OF INSPIRATORY MUSCLE WARM-UP ON INSPIRATORY MUSCLE STRENGTH DURING AEROBIC AND ANAEROBIC EXERCISE IN ATHLETES

Enrolling by invitation · Not applicable · Has a placebo group

Conditions studied: Healthy Participants

In brief

Inspiratory muscle warm-up (IMW) is a specific pre-exercise breathing intervention designed to prepare the respiratory muscles before physical activity and potentially enhance exercise performance. Previous research suggests that IMW may acutely improve inspiratory muscle function; however, the duration of these effects during exercise and their responses under different exercise intensities remain unclear. Furthermore, placebo-controlled comparisons are limited in the current literature. The purpose of this study is to investigate the acute effects of inspiratory muscle warm-up on inspiratory muscle strength during aerobic and anaerobic exercise in trained athletes. The study will compare three experimental conditions: a standardized inspiratory muscle warm-up protocol, a placebo breathing warm-up, and a control condition without respiratory warm-up. In this repeated-measures interventional study, trained athletes aged 14-30 years will complete three experimental sessions in randomized order. The active intervention consists of inspiratory muscle warm-up performed at 40% of maximal inspiratory pressure (MIP). The placebo condition includes a low-resistance breathing protocol designed to mimic the intervention without providing a meaningful training stimulus. The control condition involves exercise performed without respiratory warm-up. Participants will perform treadmill exercise at intensity levels representing aerobic and anaerobic workloads, defined according to percentage of maximal heart rate. Inspiratory muscle strength (MIP) will be assessed at baseline, immediately after the warm-up protocols, and periodically during exercise to evaluate time-dependent changes. The primary objective is to determine how long the acute increase in inspiratory muscle strength is maintained during exercise and to compare responses between aerobic and anaerobic athletes across the three conditions. The findings may provide evidence-based guidance for integrating respiratory muscle warm-up strategies into sport-specific preparation routines.

Key facts

Study ID

NCT07445269

Run by

Hitit University

People needed

28

Starts

2026-02-25

Expected to finish

2026-03-30

Last updated by the study team

2026-03-03

Who can join

Age: 14 and older, up to 30. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Age between 14 and 30 years.
• Regular participation in organized sports training for at least 4 years.
• Engaged in predominantly aerobic or anaerobic sports disciplines.
• Training frequency of at least 3 sessions per week.
• No known cardiopulmonary disease affecting respiratory function.
• Ability to safely perform maximal effort treadmill exercise.
• No respiratory illness within the last 12 weeks.
• Willingness to comply with study procedures.
• Provision of written informed consent (and parental consent for minors where applicable).

You may not qualify if…

• History of asthma, chronic obstructive pulmonary disease (COPD), or other respiratory disorders.
• Age below 14 years or above 30 years.
• Orthopedic injury or condition limiting running ability.
• Participation in inspiratory muscle training within the last 12 months.
• Use of medications affecting respiratory or cardiovascular function.
• Active smoking.
• Failure to provide informed consent.

Where it is running

• Hitit University Faculty of Sport Sciences, Exercise Physiology Laboratory — Çorum, Turkey (Türkiye)

Full record on ClinicalTrials.gov

Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.