Çiğdem ÖZDEMİR, Kerem T. ÖZGÜNEN, Özgür GÜNAŞTI, Selcen KORKMAZ ERYILMAZ, Abdullah KILCI, C.çağlar BILDIRCIN, S.sadi KURDAK

Egzersiz sırasında substrat kesişim noktasındaki yağ oksidasyonlarının farklı vücut kitle indeksine sahip kadınlarda karşılaştırılması

Amaç: Bu çalışmada farklı vücut kitle indeksine (VKİ) sahip sedanter genç kadınların bazal metabolik hız (BMH) ölçümü ve performans testleri sırasında ortaya çıkan kesişim noktalarında göstermiş oldukları metabolik yanıtları ile yağ oksidasyonu ilişkilerinin değerlendirilmesi amaçlanmıştır. Gereç ve Yöntem: Çalışmaya vücut kitle indekslerine göre normal kilolu (n=10), aşırı kilolu (n=10) ve sınıf I obez (n=10) olmak üzere toplam 30 kadın katıldı. Katılımcıların bazal metabolik hızları ve egzersiz anındaki metabolik yanıtları indirekt kalorimetre ile ölçüldü (Quark B2). Egzersizler yürüme bandında şiddeti kademeli olarak artan test protokolü kullanılarak gerçekleştirildi. Bulgular: Grupların vücut kitle indeksleri arasında anlamlı farklılık bulunmuştur. Pik oksijen tüketimi vücut ağırlığına göre normalize edildiğinde kilo artışı ile birlikte oksijen tüketiminin azaldığı görülmüştür. Kesişim noktasındaki yağ oksidasyon hızı, kilo artışıyla beraber yükselmiş, normal kilolu kadınlarla sınıf I obez bireyler arasındaki fark anlamlı bulunmuştur. Kesişim noktasında harcanılan enerji miktarının sınıf I obez ve aşırı kilolu kadınlarda normal kilolu kadınlardan anlamlı olarak daha yüksek olduğu tespit edilmiştir. Sonuç: Vücut kitle indeksindeki artış, kesişim noktasındaki egzersizlerde toplam enerji sarfı ile yağ oksidasyon hızını arttırmıştır.

Anahtar Kelimeler:

Kardiyopulmoner egzersiz testi, obezite, bazal metabolik hız

Comparision of fat oxidation rate at crossover point during exercise among women with different body mass index

Purpose: The aim of this study was to evaluate the relationship between metabolic responses and fat oxidation at basal metabolic rate (BMR) and crossover point during performance tests in sedentary young women with different body mass index (BMI). Materials and Methods: Thirty sedentary women who were classified as normal weight (n=10), overweight (n=10) and class I obese (n=10) according to their body mass index participated in this study. Participants' basal metabolic rate and metabolic responses during exercise were measured by indirect calorimetry (Quark B2). Exercises were performed with gradually increased test protocols on treadmill. Results: Body mass index of groups were significantly different than each other. Body weight normalized peak oxygen uptake value reduced significantly with weight gain. Fat oxidation rate at crossover point increased with weight gain and the difference between normal and class-I obese women was found to be significant. Comparison of energy expenditure at crossover point for normal weight group was found to be significantly lower than overweight and class-I obese women. Conclusion: Fat oxidation rates and total energy expenditure increases with body mass index at crossover point.

Keywords:

Cardiopulmonary exercise test, obesity, basal metabolic rate,

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