Dataset for the day-to-day reliability of peak fat oxidation and FATMAX

The aims of this study were to characterise the day-to-day reliability of peak fat oxidation rates (PFO), and the exercise intensity it occurs at (i.e. FATMAX), in a diverse cohort of healthy men and women. Additionally, this study explored the level of agreement between three different data analysis approaches [the measured values approach, polynomial second order (P2) and the SINE model (SIN)] to determine PFO and FATMAX. This study was a cross-sectional study that recruited n = 115 adults (aged 18 – 65 years) who had varying levels of cardiorespiratory fitness, habitual physical activity levels and body composition. Participants completed three trials (Trial A, Trial B and Trial C) alongside the assessment of habitual physical activity levels (via a chest worn monitor) and dietary intake (self-reported diet record).

The dataset includes demographic data of the participants (n=115) and data from the three trials they participated in. Types of data that were collected during the trials are as follows - Trial A and Trial B followed identical protocols that involved anthropometric measurements, resting metabolic rate, a resting venous blood sample and the completion of a graded exercise test to determine PFO and FATMAX by indirect calorimetry. At Trial C, body composition was assessed (via a dual energy x-ray absorptiometry scan) and optional adipose tissue and/or skeletal muscle biopsies were obtained. All trials were completed in an overnight fasted-state.