The Effect of Inspiratory Muscle Training on Respiratory Parameters, Balance, Trunk Endurance and Trunk Isokinetic Muscle Strength in Wrestling Athletes

NCT07083258 | Not Yet Recruiting

• 1 other identifier: OMÜ2025/257
• Study Type: interventional
• Target: 30
• Locations: 1 country
• Sites: 1

Brief Summary

Title: The Effects of Inspiratory Muscle Training on Respiratory Parameters, Balance, Trunk Endurance, and Trunk Isokinetic Muscle Strength in Elite Female Freestyle Wrestlers Objective: This experimental study aims to investigate the effects of inspiratory muscle training on respiratory functions, trunk muscle strength, endurance, and balance in elite female freestyle wrestlers. Methods: This randomized controlled trial will include 30 elite female freestyle wrestlers aged between 16 and 22. Participants will be randomly assigned to either an intervention group or a placebo control group using a simple randomization method. The intervention group will receive progressive inspiratory muscle training with the POWERbreathe Plus device, 5 days per week for 4 weeks. The training load will increase weekly. The control group will undergo low-resistance inspiratory training set at 15% of their baseline maximal inspiratory pressure (MIP), serving as a placebo. Pre- and post-intervention assessments will be conducted by a blinded evaluator.

Conditions

Physiological Performance in Healthy Female Athletes

Keywords

Inspiratory Muscle Training; Elite Athletes; Female Wrestlers; Trunk Muscle Endurance; Balance; Cardiopulmonary Rehabilitation

Outcome Measures

Primary Outcomes (5)

• Change in Maximal Inspiratory Pressure (MIP) [cmH₂O]

  Maximal inspiratory pressure (MIP) will be measured using the Cosmed Pony FX device. This value reflects the strength of inspiratory muscles before and after the intervention.

  Baseline (Week 0) and Post-intervention (Week 4)

• Change in Maximal Expiratory Pressure (MEP) [cmH₂O]

  Maximal expiratory pressure (MEP) will be assessed using the Cosmed Pony FX spirometer. It indicates the force generated by expiratory muscles and will be compared pre- and post-training.

  Baseline (Week 0) and Post-intervention (Week 4)

• Change in Forced Expiratory Volume in 1 Second (FEV1) [liters]

  FEV1 will be measured using the Cosmed Pony FX to evaluate pulmonary function. The value reflects the volume of air expelled in the first second of a forced exhalation.

  Baseline (Week 0) and Post-intervention (Week 4)

• Change in Forced Vital Capacity (FVC) [liters]

  FVC will be assessed with the Cosmed Pony FX device. It measures the total volume of air forcibly exhaled after a full inspiration, used to evaluate lung capacity changes due to training.

  Baseline (Week 0) and Post-intervention (Week 4)

• Change in FEV1/FVC Ratio [%]

  The FEV1/FVC ratio will be calculated from pulmonary function testing to assess airway function and efficiency. The ratio will be compared between baseline and after the 4-week intervention.

  Baseline (Week 0) and Post-intervention (Week 4)

Secondary Outcomes (9)

• Time Held in Trunk Flexion Test [seconds]

  Baseline (Week 0) and Post-intervention (Week 4)

• Time Held in Side Plank Test [seconds]

  Baseline (Week 0) and post-intervention (Week 4)

• Time Held in Trunk Extension Test [seconds]

  Baseline (Week 0) and Post-intervention (Week 4)

• Peak Torque of Trunk Flexors [Nm]

  Baseline (Week 0) and Post-intervention (Week 4)

• Peak Torque of Trunk Extensors [Nm]

  Baseline (Week 0) and Post-intervention (Week 4)

Study Arms (2)

Inspiratory Muscle Training Program

EXPERIMENTAL

Participants in this group will receive a progressive inspiratory muscle training (IMT) program using the POWERbreathe Plus device. Training will be conducted 5 days per week for 4 weeks. The intensity will start at 50% of the participant's measured maximal inspiratory pressure (MIP) and will be increased by 10% each week, reaching 80% in the final week. All training will be performed in addition to the athletes' regular wrestling sessions. Participants in this group will be assessed for respiratory parameters, trunk endurance, balance, and trunk isokinetic muscle strength before and after the intervention.

Device: Progressive Inspiratory Muscle Training (IMT)

Control Group

PLACEBO COMPARATOR

Participants in the control group will receive a sham inspiratory muscle training program using the same device. The training intensity will be fixed at 15% of the initial MIP throughout the 4-week period to produce a placebo effect. The frequency and duration of training will mirror that of the experimental group. Participants will undergo identical pre- and post-intervention evaluations.

Other: Placebo Training

Interventions

Progressive Inspiratory Muscle Training (IMT) DEVICE

The intervention involves the application of inspiratory muscle training using the POWERbreathe Plus device. Training will be conducted at an initial intensity of 50% of the individual's MIP and will be increased weekly by 10%, reaching 80% by week four. Sessions will take place 5 days per week and consist of 2 sets of 30 repetitions per day, with 2-minute rest intervals between sets. This training aims to improve inspiratory muscle strength and endurance, as well as core stability, respiratory function, dynamic balance, and trunk isokinetic strength.

Inspiratory Muscle Training Program

Placebo Training OTHER

The placebo group will perform identical training sessions using the same device but with a constant minimal resistance set at 15% of the initial MIP, insufficient to induce a physiological training effect. This intervention is designed to control for placebo response. Assessment protocols will be identical to those in the experimental group.

Control Group

Eligibility Criteria

• Age: 16 Years - 22 Years
• Sex: female
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64)

You may qualify if:

• To be an athlete in the Freestyle Women's Wrestling branch.
• Participating in regular training at least 4 days a week.
• To volunteer to participate in the study.
• Being an athlete within TOHM for at least one year.
• To be between the ages of 16-22.

You may not qualify if:

• Have a cardiopulmonary disease that precludes the use of Pulmonary Function Testing.
• Have specific balance problems (e.g., vestibular or neurological impairment).

Sponsors & Collaborators

• Ondokuz Mayıs University: lead

Study Sites (1)

Ondokuz Mayıs Üniversitesi

Samsun, Turkey (Türkiye)

Location

Central Study Contacts

Mine PEKEŞEN KURTÇA

CONTACT

+90 05079277327; mine.pekesenkurtca@omu.edu.tr

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: DOUBLE
• Who Masked: PARTICIPANT, OUTCOMES ASSESSOR
• Purpose: SUPPORTIVE CARE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Ass.Prof.

Study Record Dates

• First Submitted: July 2, 2025
• First Posted: July 24, 2025
• Study Start: December 15, 2025
• Primary Completion (Estimated): June 30, 2026
• Study Completion (Estimated): December 30, 2026
• Last Updated: November 14, 2025

Record last verified: 2025-11

Locations

TU (1)