Turkiye Klinikleri Journal of Sports Sciences

.: ORIGINAL RESEARCH
Different Normalization Strategies Could Be Applied to Evaluate the Resting and Walking Energy Expenditures of Individuals with Different Body Mass Index
Farklı Beden Kitle İndeksine Sahip Bireylerin Dinlenim ve Yürüme Enerji Tüketimlerini Değerlendirmek İçin Farklı Normalizasyon Yöntemleri Uygulanabilir
Zeynep ALTINKAYAa, Uğur DALa, Figen DAĞb, Merve TÜRKEGÜNc
aMersin University Faculty of Medicine, Department of Physiology, Mersin, TURKEY
bMersin University Faculty of Medicine, Department of Physical Medicine and Rehabilitation, Mersin, TURKEY
cMersin University Faculty of Medicine, Department of Biostatistics and Medical Informatics, Mersin, TURKEY
Turkiye Klinikleri J Sports Sci. 2020;12(1):84-93
doi: 10.5336/sportsci.2019-71539
Article Language: EN
Full Text
ABSTRACT
 Objective: The energy expenditure can be measured either during resting condition or performing a particular type of a physical activity. The purpose of this study is to evaluate the resting and walking energy expenditure at preferred walking speed (PWS) with different body mass index (BMI) and to determine the effect of normalization techniques to these data. Material and Methods: Four groups are formed as underweight, normal, overweight, and obese according to BMI of individuals. A total of 64 healthy young adults with no known gait disabilities were recruited. The gross resting energy expenditure (REE) was measured with indirect calorimeter method for 30 min and walking energy expenditure was measured during subjects' walk in their PWS on treadmill for 7 min. Results: The gross REE was significantly higher in obese subjects compared to underweight and normal subjects (p<0.0001). When REE was normalized to body weight, it was higher in underweight and normal groups than overweight and obese groups (p<0.0001). However, when REE was normalized to fat-free mass, it did not differ significantly between groups. The gross walking energy expenditure in PWS was higher in obese and overweight groups than underweight and normal groups (p<0.0001). Conclusion: In order to eliminate fat-mass effect on REE of obese individuals, REE normalized to fat-free mass should be used to acquire more accurate results. On the other hand, the fat-mass increment raises energy requirement while walking to retain the body balance. Thus, gross walking energy expenditure should be taken into consideration for the evaluating energy expenditure of walking.

Keywords: Energy expenditure; body composition; obesity
ÖZET
 Amaç: Enerji tüketimi, hem dinlenim hem de belli bir fiziksel aktivite sırasında ölçülebilmektedir. Bu çalışmanın amacı farklı beden kitle indeksi (BKİ)'ne sahip bireylerin dinlenim ve tercih edilen yürüme hızı (TEYH)'ndaki yürüme enerji tüketimlerini değerlendirmek ve normalizasyon yöntemlerinin bu veriler üzerindeki etkisini belirlemektir. Gereç ve Yöntemler: Bireylerin BKİ'sine göre zayıf, normal, vücut ağırlığı fazla ve obez olmak üzere 4 grup oluşturulmuştur. Yürüme bozukluğu olmayan 64 sağlıklı genç birey çalışmaya dahil edilmiştir. Brüt dinlenim enerji tüketimi indirekt kalorimetre yöntemiyle 30 dakika ve yürüme enerji tüketimi bireylerin TEYH'de 7 dakika boyunca ölçülmüştür. Bulgular: Brüt dinlenim enerji tüketimi zayıf ve normal bireylerle kıyaslandığında obez bireylerde anlamlı olarak daha yüksektir (p<0,0001). Dinlenim enerji tüketimi vücut ağırlığı ile normalize edildiğinde zayıf ve normal gruplarda vücut ağırlığı fazla ve obez gruplara göre daha yüksek bulunmuştur (p<0,0001). Ancak dinlenim enerji tüketimi yağsız kütle ile normalize edildiğinde gruplar arasında anlamlı bir fark olmamıştır. TEYH'deki brüt yürüme enerji tüketimi vücut ağırlığı fazla ve obez gruplarda zayıf ve normal gruplara göre yüksek bulunmuştur (p<0,0001). Sonuç: Obez bireylerde dinlenim enerji tüketimi üzerinde yağ kütlesinin etkisini elimine etmek için dinlenim enerji tüketiminin yağsız kütle ile normalizasyonu daha doğru sonuçların elde edilmesini sağlayabilir. Diğer yandan, yağ kütlesinin artışı yürüme sırasında vücut dengesini korumak için enerji gereksinimini artırmaktadır. Bu nedenle yürüme enerji tüketiminin değerlendirilmesinde brüt yürüme enerji tüketimi göz önünde bulundurulabilir.

Anahtar Kelimeler: Enerji tüketimi; vücut kompozisyonu; obezite
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