Achieving and maintaining a healthy weight requires adequate sleep (Sekine et al., 2002;Taheri, 2006). Adequate sleep is a strong weapon for good health in general. Childhood and adolescent severe obesity are associated with serious co-morbidities, including obstructive sleep-disordered breathing (SDB), sleep disturbances, daytime sleepiness, asthma, type 2 diabetes mellitus, hypertension, dyslipidaemia, non-alcoholic fatty liver disease (NAFLD), and even premature death (Kelly et al., 2013). Children growing up in poverty have lower sleep quality and duration, which may lead to childhood obesity (Bagley, Kelly, Buckhalt, & El-Sheikh, 2015). Furthermore, adolescents are at higher risk of insufficient sleep due to a physiological delay in sleep phase plus academic and social demands (Gohil & Hannon, 2018). These childhood problems can complicate adulthood, as severe childhood obesity is associated with adulthood obesity. Additionally, the co-morbidities of severe obesity can have lasting sequelae, such as cardiovascular, metabolic and neurocognitive morbidities (Lo Bue, Salvaggio, & Insalaco, 2020) .Severe obesity was previously defined as body mass index (BMI) > 99th percentile, but more recently it has been defined as BMI ≥ 120% of the 95th percentile as class II and BMI ≥ 140% of the 95th percentile as class III obesity (Skinner, Ravanbakht, Skelton, Perrin, & Armstrong, 2018). Skinner et al. (2018) studied the prevalence of obesity and severe obesity in US children from 1999 to 2016, and reported a significant increase in severe obesity among children aged 2−5 years since the 2013-2014 cycle, a trend that continued upward for many years.