2.1. Participants and Recruitment
INSULIN SENSITIVITY
The current study was conducted in accordance with the University of Bedfordshire Research Ethics Committee’s ethical standards (number: 2018ISPAR018) and the Helsinki Declaration of 1975 as revised in 1983. The study was registered at clinicaltrials.gov (identifier NCT04476693). Data collection was completed between December 2018 and July 2019 in the Sport and Exercise Science Laboratories at the University of Bedfordshire. Girls were recruited from schools in Bedford, England. Parental informed consent and child assent were gained for all participants. Inclusion criteria were being female, being aged 12 to 14 years, attending a school in Bedford, and being classified as a habitual breakfast consumer. This age range is highly relevant as it typically coincides with the mid-pubertal drop in insulin sensitivity and the decline in breakfast consumption and physical activity levels among girls [