Comparison of maximal fat oxidation, body composition and maximum oxygen consumption values among healthy, diabetic and overweight/obese women

  1. González-Mariscal, A. 1
  2. Opazo, E. 1
  3. Marín-Galindo, A. 1
  4. Montes-De-Oca, A. 1
  5. Ramírez-Jiménez, M. 1
  6. Corral-Pérez, J. 1
  7. Pérez-Bey, A. 1
  8. Velázquez-Díaz, D. 1
  9. Rebollo-Ramos, M. 1
  10. Jesús Gustavo Ponce González
  1. 1 Universidad de Cádiz

    Universidad de Cádiz

    Cádiz, España


27th Annual Congress of the European College of Sport Science

Publisher: European College of Sport Science

ISBN: 978-3-9818414-5-9

Year of publication: 2022

Type: Conference paper


INTRODUCTION: Obesity and type 2 diabetes (T2D) are related to reduced maximal fat oxidation (MFO) (1) which is an important indicator of metabolic flexibility (2). Thus, the aim of this study was to compare MFO values between healthy, diabetic and overweight/obese women.METHODS: Fifty-two women including 33 healthy women (L) (age: 21,8±2,9; BMI: 21,2±1,7) 13 overweight/obese (OWOB) (age: 28,1±5,9; BMI: 33,7±6,9) and 6 with T2D (DM) (age: 50,5±10,7; BMI: 37,4±4,6) were included in the study. An incremental stress test was performed on a cycloergometer with two consecutive stages. The first stage consisted in 3-min increments of 15-30W depending on the weight of the subject with a cadence of 60-80 rpm until RER ≥1 in order to calculate MFO Once reached, an active rest of 3-5 minutes was taken after which the second stage began with 1-min increments until exhaustion to determine the VO2max. A 1-way ANOVA was used with Bonferroni comparisons. RESULTS: The MFO relativized by body weight (kg) showed significant differences (p=0.01; p=0.00) between the DM-L and OWOB-L groups as well as when relativized by fat mass. L women had the highest values (mean: 0.053 g/min/kg), followed by OWOB women (mean: 0.032 g/min/kg) and DM group (mean: 0.027 g/min/kg). There were no differences in absolute values. As for VO2max/kg, there is a significant mean difference in DM-L and L-OWOB (p=0.00) with L women having the highest values (mean: 40.02ml/kg/min), followed by OWOB women (mean: 23.6ml/kg/min) and diabetics with a mean of 17.5ml/kg/min. Otherwise, in absolute values, there is a significant mean difference in DM and L (p=0.012). No statically significant differences in the rest of comparisons. CONCLUSION: Healthy normal-weight women have higher MFO and VO2max values relative to weight than diabetic and/or obese women. Diabetic women have a significantly lower VO2max than normal-weight women in absolute values.