This study aims to compare acute thyroid hormone and cortisol responses to aerobic and anaerobic exercise in sedentary women. Thirty sedentary women aged 18-25 years will voluntarily participate in the study. Participants will complete a 20-meter shuttle run test as the aerobic exercise protocol and a 30-second Wingate test as the anaerobic exercise protocol in separate testing sessions. Blood samples will be collected immediately before and after each exercise protocol. Serum thyroid-stimulating hormone (TSH), triiodothyronine (T3), thyroxine (T4), and cortisol concentrations will be determined using chemiluminescence-based laboratory methods. Changes in hormone concentrations will be compared between the aerobic and anaerobic exercise conditions.
Female participants aged 18-25 years
Studying at the Faculty of Sports Sciences of Yalova University
Not actively participating in regular exercise or sports training
Voluntarily agreeing to participate in the study
Having a neurological disorder during the previous year
Having an auditory, visual, or vestibular disorder during the previous year
Having experienced a serious upper- or lower-extremity injury during the previous six months
Having any medical condition identified during screening that could prevent safe participation in maximal exercise testing
Single group
20-Meter Shuttle Run Test
BehavioralParticipants will perform a progressive 20-meter shuttle run test by running continuously between two lines positioned 20 meters apart in time with prerecorded audio signals. The initial running speed will progressively increase as the interval between audio signals decreases. The test will end when the participant fails to reach the designated line before the signal on two consecutive occasions.
Wingate Anaerobic Test
BehavioralParticipants will perform a 30-second Wingate anaerobic test on a Monark cycle ergometer connected to computerized analysis software. Following an unloaded acceleration phase of approximately 3-4 seconds, a resistance corresponding to 65 g/kg of body mass will be applied. Participants will be instructed to pedal against this resistance at maximal effort for 30 seconds. Peak power, mean power, minimum power, and fatigue index will be recorded.
Change in Serum Cortisol Concentration
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Assoc. Prof. Dr. Özgür EKEN
Lead sponsor
Inonu University
Sponsor institution
Karabuk University
Collaborator
