Cardiopulmonary capacities of individuals are an indication of both the individual's exercise capacity and endurance. The most important indicator of cardiopulmonary capacity is maximum oxygen uptake and respiratory parameters. Auxiliary respiratory muscles exercises and core stabilization exercises have a place in increasing the maximum oxygen uptake. There are studies investigating the effects of respiratory muscle training and core stabilization training on maximum oxygen uptake in the literature. However, there is no study in the literature comparing the effects of auxiliary respiratory muscles exercises and core stabilization exercises on maximum oxygen uptake and respiratory parameters. Thanks to the findings to be obtained from our study, it is aimed to contribute to the literature with objective, evidence-based results in this field.

The study will be carried out on volunteers after the approval of the ethics committee. Before the research, individuals and / or their relatives will be informed about the purpose and content of the study. Volunteer individuals between the ages of 18-25 without any known health problems will be included in the study after obtaining their informed consent.

Participants will be randomly divided into three groups: control group, core stabilization exercises and auxiliary respiratory muscles exercises.

In the core stabilization exercises and auxiliary respiratory muscles exercises groups, exercises will be carried out under the supervision of a physiotherapist 3 days in a week separate time periods. Core stabilization exercise include, plank, lateral plank, swimmer, flutter kick and bridge exercises. Auxiliary respiratory exercises include, strengthening and stretching exercises for trapezius, sternocleidomastoideus, pectoralis major and serratus anterior muscles. Our study will take 6 weeks. The demographic information of the participants will be recorded and the VO2max values of the participants before and after the study will be measured with the H / P Cosmos Mercury Med device using the balke protocol. Respiratory function tests of participants will be measured with Cosmed Fitmate Med device before and after the study.

Inclusion Criteria:

• Healthy individuals without any known health problems

Exclusion Criteria:

• Acute myocardial infarction, Unstable angina, Uncontrolled cardiac arrhythmias, Endocarditis, Various symptomatic aortic stenosis, Acute pulmonary embolism, pulmonary infarction and deep vein thrombosis, Acute myocarditis, pericarditis, physically not enough fit to test safely