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Acute Endocrine Responses to Aerobic and Anaerobic Exercise in Sedentary Women: A Comparative Analysis of Thyroid Hormones and Cortisol
Sponsor: Assoc. Prof. Dr. Özgür EKEN
Summary
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.
Key Details
Gender
FEMALE
Age Range
18 Years - 24 Years
Study Type
INTERVENTIONAL
Enrollment
30
Start Date
2026-09-15
Completion Date
2026-09-30
Last Updated
2026-09-16
Healthy Volunteers
Yes
Interventions
20-Meter Shuttle Run Test
Participants 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
Participants 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.
Locations (1)
Karabuk University, Hasan Dogan Faculty of Sport Sciences
Karabük, Karabük Province, Turkey (Türkiye)