Polysomnographic indicators of restorative sleep and body mass trajectories in the Wisconsin Sleep Cohort Study

Body mass trajectories from adolescence to adulthood in the United States: Effects of racial identification and adverse childhood experiences

The non-Hispanic Black population in the U.S. has experienced one of the highest obesity rates, relative to the non-Hispanic White population and other racial groups. This study explores how adverse childhood experiences (ACEs) and racial identification influence body mass trajectories from adolescence to adulthood. Participants include non-Hispanic Black and non-Hispanic White individuals from the National Longitudinal Study of Adolescent to Adult Health (n = 5438). The outcome measure was body mass index (BMI). The Behavioral Risk Factor Surveillance System ACE Module and the CDC's Kaiser ACE research were used to create ACE categories. Multilevel growth curve models were utilized to address the study's objectives. BMI trajectories were steeper among female respondents who experienced multiple ACEs (β ̂ $$ \hat{\beta} $$ = 0.035; p < .01) than among females without any ACE. Among females, BMI trajectories were jointly moderated by ACEs and race (likelihood ratio test:χ 2 $$ {\chi}^2 $$ = 130.76, p < .001), showing stronger ACE effects among non-Hispanic Black respondents. However, ACEs were not statistically associated with mean BMI or BMI trajectories among male respondents. Results further indicated that the effects of multiple ACEs were more evident at early ages and had a more marked impact on BMI among non-Hispanic Black females than non-Hispanic White females. Unhealthy BMI gains, especially among females, could be reduced through targeted interventions designed to support non-Hispanic Black children and adolescents.

Effects of high-intensity interval training on subjective sleep quality and daytime sleepiness in patients with obstructive sleep apnea: A secondary analysis from a randomized controlled trial

This study aimed to verify the effect of 12 weeks of HIIT on the perceived sleep quality and excessive daytime sleepiness in patients with obstructive sleep apnea (OSA). For this, a secondary analysis of a randomized controlled trial, including 36 adults with moderate-severe OSA (19 males; 52.2 ± 9.8 years; body mass index = 34.2 ± 5.8; AHI = 42.0 ± 22.9 e/h) was performed. Participants were randomly assigned to HIIT [5 periods of 4 min of walking or running on a treadmill at 90-95 % of maximum heart rate (HRmax) interspersed with 3 min of walking at 50-55 % of HRmax performed three times per week for 12 weeks] or a control group (CG; stretching exercises performed two times per week for 12 weeks). Specific domains of subjective sleep quality and EDS were assessed at baseline and post 12 weeks. Generalized estimated equation were used to verify between groups and times differences. There were no group × time interactions for the domains sleep duration (0.416), sleep efficiency (0.198), sleep disturbance (0.523), and sleep medications (0.915). However, significant group × time interactions were observed for global sleep score (0.022), and for the domains sleep quality (0.001), sleep latency (0.029), and daytime dysfunction (0.012). In addition, there was a significant group × time interaction for EDS (HIIT = -3.4 ± 0.9; CG change = -1.0 ± 1.0; p = 0.023). Thus, in patients with OSA, 12 weeks of HIIT improves perceived sleep quality and daytime sleepiness.

Obesity and Obstructive Sleep Apnea

Obstructive sleep apnea (OSA) is characterized by upper airway collapse during sleep. Chronic intermittent hypoxia, sleep fragmentation, and inflammatory activation are the main pathophysiological mechanisms of OSA. OSA is highly prevalent in obese patients and may contribute to cardiometabolic risk by exerting detrimental effects on adipose tissue metabolism and potentiating the adipose tissue dysfunction typically found in obesity. This chapter will provide an update on: (a) the epidemiological studies linking obesity and OSA; (b) the studies exploring the effects of intermittent hypoxia and sleep fragmentation on the adipose tissue; (c) the effects of OSA treatment with continuous positive airway pressure (CPAP) on metabolic derangements; and (d) current research on new anti-diabetic drugs that could be useful in the treatment of obese OSA patients.