Effects of Delayed Muscle Pain on Respiratory Muscle Function

The aim of the study was to determine whether delayed-onset muscle soreness (DOMS) in trunk muscles has an effect on respiratory function parameters, respiratory muscle strength, respiratory muscle endurance, and exercise capacity.

In 24 healthy university students was induced for the trunk muscles with a load equals to 80% of the maximum repetitive voluntary contraction. Pulmonary function parameters, respiratory muscle strength and endurance, exercise capacity, pain, fatigue, and dyspnea perception severity were recorded before DOMS and at the 24th and 48th hours after DOMS. After DOMS, there is a decrease in respiratory performance values and exercise capacity of healthy individuals and athletes. Therefore, it should be taken into account that delayed muscle soreness before the competition may affect performance. It may be beneficial to take precautions for delayed muscle pain while creating training and exercise programs, and to create treatment programs in case of the emergence of DOMS.

24 healthy university students (n=11 female, n=13 male) with a mean age of 21±2 years included the study.

DOMS was induced for the trunk muscles with a load equals to 80% of the maximum repetitive voluntary contraction. Pulmonary function parameters, respiratory muscle strength and endurance, exercise capacity, pain, fatigue, and dyspnea perception severity were recorded before DOMS and at the 24th and 48th hours after DOMS.

For a maximum repetition of the trunk muscles, two measurements were made with a 45-second rest interval.The values were recorded in Newtons by taking the maximum value of the two repetitions measured. DOMS was formed by eccentric contraction with 80% of this determined value.To generate DOMS in the trunk, participants were seated on the bench with the knees flexed at 90° and the soles of the feet in full contact with the floor, keeping the weight at 80% of the predetermined maximum repetition.The participants were asked to perform trunk extension with eccentric contraction of the trunk in 5 seconds, and trunk flexion with concentric contraction in 3 seconds.Two-minute rests between sets and 45-second rests between repetitions were given.The date and time of the created DOMS were recorded and the measurements were repeated at the 24th and 48th hours.

Forced vital capacity (FVC) was evaluated. The volume of air that is exhaled quickly and strongly following a deep inspiration. Test were performed using a portable spirometer (MIR Spirolab III srl, Italy). During the test, the subject was in a sitting position and their nose was clamped. The test were repeated three times and the best measurement value was used.

Forced expiratory volume in the first second (FEV1) was evaluated. It is the volume of air expelled in the first second from the start of the forced vital capacity maneuver. It gives information about the restriction on major airlines in general.Test were performed using a portable spirometer (MIR Spirolab III srl, Italy). During the test, the subject was in a sitting position and their nose was clamped. The test were repeated three times and the best measurement value was used. Individuals were asked to make a forced expiration after maximum inspiration.

Flow rate value of forced expiratory volume (FEF25%-75%) was evaluated. It is the mean flow rate in 50% of the forced vital capacity maneuver. Test were performed using a portable spirometer (MIR Spirolab III srl, Italy). During the test, the subject was in a sitting position and their nose was clamped. The test were repeated three times and the best measurement value was used. Individuals were asked to make a forced expiration after maximum inspiration.

Vital capacity (VC) was evaluated. It is the volume of air in the lungs that varies between full inspiration and maximum expiration. It is possible to measure the volume of both a slow and vigorous exhalation after a deep inspiration.Test were performed using a portable spirometer (MIR Spirolab III srl, Italy). During the test, the subject was in a sitting position and their nose was clamped. The test were repeated three times and the best measurement value was used.

Forced vital capacity (FVC) was evaluated. The volume of air that is exhaled quickly and strongly following a deep inspiration. Test were performed using a portable spirometer (MIR Spirolab III srl, Italy). During the test, the subject was in a sitting position and their nose was clamped. The test were repeated three times and the best measurement value was used.

Pulmonary function test measurements were made in all individuals at the 24th hours after the trunk-oriented DOMS.

Forced expiratory volume in the first second (FEV1) was evaluated. It is the volume of air expelled in the first second from the start of the forced vital capacity maneuver. It gives information about the restriction on major airlines in general.Test were performed using a portable spirometer (MIR Spirolab III srl, Italy). During the test, the subject was in a sitting position and their nose was clamped. The test were repeated three times and the best measurement value was used. Individuals were asked to make a forced expiration after maximum inspiration.

Pulmonary function test measurements were made in all individuals at the 24th hours after the trunk-oriented DOMS.

Flow rate value of forced expiratory volume (FEF25%-75%) was evaluated. It is the mean flow rate in 50% of the forced vital capacity maneuver. Test were performed using a portable spirometer (MIR Spirolab III srl, Italy). During the test, the subject was in a sitting position and their nose was clamped. The test were repeated three times and the best measurement value was used. Individuals were asked to make a forced expiration after maximum inspiration.

Pulmonary function test measurements were made in all individuals at the 24th hours after the trunk-oriented DOMS.

Vital capacity (VC) was evaluated. It is the volume of air in the lungs that varies between full inspiration and maximum expiration. It is possible to measure the volume of both a slow and vigorous exhalation after a deep inspiration.Test were performed using a portable spirometer (MIR Spirolab III srl, Italy). During the test, the subject was in a sitting position and their nose was clamped. The test were repeated three times and the best measurement value was used.

Pulmonary function test measurements were made in all individuals at the 24th hours after the trunk-oriented DOMS.

Forced vital capacity (FVC) was evaluated. The volume of air that is exhaled quickly and strongly following a deep inspiration. Test were performed using a portable spirometer (MIR Spirolab III srl, Italy). During the test, the subject was in a sitting position and their nose was clamped. The test were repeated three times and the best measurement value was used.

Pulmonary function test measurements were made in all individuals at the 48th hours after the trunk-oriented DOMS.

Forced expiratory volume in the first second (FEV1) was evaluated. It is the volume of air expelled in the first second from the start of the forced vital capacity maneuver. It gives information about the restriction on major airlines in general.Test were performed using a portable spirometer (MIR Spirolab III srl, Italy). During the test, the subject was in a sitting position and their nose was clamped. The test were repeated three times and the best measurement value was used. Individuals were asked to make a forced expiration after maximum inspiration.

Pulmonary function test measurements were made in all individuals at the 48th hours after the trunk-oriented DOMS.

Flow rate value of forced expiratory volume (FEF25%-75%) was evaluated. It is the mean flow rate in 50% of the forced vital capacity maneuver. Test were performed using a portable spirometer (MIR Spirolab III srl, Italy). During the test, the subject was in a sitting position and their nose was clamped. The test were repeated three times and the best measurement value was used. Individuals were asked to make a forced expiration after maximum inspiration.

Pulmonary function test measurements were made in all individuals at the 48th hours after the trunk-oriented DOMS.

Vital capacity (VC) was evaluated. It is the volume of air in the lungs that varies between full inspiration and maximum expiration. It is possible to measure the volume of both a slow and vigorous exhalation after a deep inspiration.Test were performed using a portable spirometer (MIR Spirolab III srl, Italy). During the test, the subject was in a sitting position and their nose was clamped. The test were repeated three times and the best measurement value was used.

Pulmonary function test measurements were made in all individuals at the 48th hours after the trunk-oriented DOMS.

Respiratory muscle strength validity and reliability were demonstrated by measuring maximal inspiratory (MIP) and maximal expiratory (MEP) pressures with a portable intraoral pressure measuring device (MicroRPM Respiratory Muscle Testing, Germany). Measurements were made using a clamp that prevents nasal breathing and were performed 5 times until a difference of 5 cmH2O remained, with a 30-second rest period between measurements to record the best value, and the best result was recorded in cmH2O. The recorded values were calculated and recorded with the expected values according to age and gender.

Respiratory muscle strength validity and reliability were demonstrated by measuring maximal inspiratory (MIP) and maximal expiratory (MEP) pressures with a portable intraoral pressure measuring device (MicroRPM Respiratory Muscle Testing, Germany). Measurements were made using a clamp that prevents nasal breathing and were performed 5 times until a difference of 5 cmH2O remained, with a 30-second rest period between measurements to record the best value, and the best result was recorded in cmH2O. The recorded values were calculated and recorded with the expected values according to age and gender.

Respiratory muscle strength validity and reliability were demonstrated by measuring maximal inspiratory (MIP) and maximal expiratory (MEP) pressures with a portable intraoral pressure measuring device (MicroRPM Respiratory Muscle Testing, Germany). Measurements were made using a clamp that prevents nasal breathing and were performed 5 times until a difference of 5 cmH2O remained, with a 30-second rest period between measurements to record the best value, and the best result was recorded in cmH2O. The recorded values were calculated and recorded with the expected values according to age and gender.

Respiratory muscle endurance was evaluated with a threshold-loaded (constant) respiratory muscle trainer (Power Breathe®, POWERbreathe International Ltd. Warwickshire, England) with proven validity and reliability . In the evaluation, measurements were made in the upright sitting position in the chair while the nose of the individuals was closed with a clip. Initial workload was applied at 60% of the maximal inspiratory pressure. Participants were asked to continue inspiring despite constant inspiratory workload. The respiratory muscle endurance value was obtained by multiplying the maximum workload of the test that can be sustained for at least one minute. Individuals were told that the test could be terminated if severe fatigue and extreme shortness of breath were experienced during the test. The results of the test were recorded.

Respiratory muscle endurance was evaluated with a threshold-loaded (constant) respiratory muscle trainer (Power Breathe®, POWERbreathe International Ltd. Warwickshire, England) with proven validity and reliability . In the evaluation, measurements were made in the upright sitting position in the chair while the nose of the individuals was closed with a clip. Initial workload was applied at 60% of the maximal inspiratory pressure. Participants were asked to continue inspiring despite constant inspiratory workload. The respiratory muscle endurance value was obtained by multiplying the maximum workload of the test that can be sustained for at least one minute. Individuals were told that the test could be terminated if severe fatigue and extreme shortness of breath were experienced during the test. The results of the test were recorded.

Respiratory muscle endurance was evaluated with a threshold-loaded (constant) respiratory muscle trainer (Power Breathe®, POWERbreathe International Ltd. Warwickshire, England) with proven validity and reliability . In the evaluation, measurements were made in the upright sitting position in the chair while the nose of the individuals was closed with a clip. Initial workload was applied at 60% of the maximal inspiratory pressure. Participants were asked to continue inspiring despite constant inspiratory workload. The respiratory muscle endurance value was obtained by multiplying the maximum workload of the test that can be sustained for at least one minute. Individuals were told that the test could be terminated if severe fatigue and extreme shortness of breath were experienced during the test. The results of the test were recorded.

The exercise capacity of the individuals was evaluated with the 6-Minute Walk Test (6 MWT), a submaximal test with high validity and reliability (ICC=0.94). 6MWT, made according to the American Thoracic Society guidlines.The distance covered in a 6-minute walk was calculated from the number of laps and meters. Values were recorded as a percentage of expected values for age and sex.

The exercise capacity of the individuals was evaluated with the 6-Minute Walk Test (6 MWT), a submaximal test with high validity and reliability (ICC=0.94). 6MWT, made according to the American Thoracic Society guidlines.The distance covered in a 6-minute walk was calculated from the number of laps and meters. Values were recorded as a percentage of expected values for age and sex.

The exercise capacity of the individuals was evaluated with the 6-Minute Walk Test (6 MWT), a submaximal test with high validity and reliability (ICC=0.94). 6MWT, made according to the American Thoracic Society guidlines.The distance covered in a 6-minute walk was calculated from the number of laps and meters. Values were recorded as a percentage of expected values for age and sex.

Inclusion Criteria: Being a healthy individual between the ages of 18-25 Not having a regular exercise habit No infection until at least 3 weeks before the study Exclusion Criteria: Lung disease Cardiovascular disease Neurological disease Orthopedic disease

Cyprus International University, Faculty of Health Sciences,Department of Physiotherapy and Rehabilitation

Ankara Yildirim Beyazit University,Faculty of Health Sciences, Physiotherapy and Rehabilitation Department

Ankara Yildirim Beyazit University,Faculty of Health Sciences, Physiotherapy and Rehabilitation Department

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