Josiane Broussard is a sleep and metabolism expert who studies how the timing of sleep, meals and exercise impacts blood sugar, weight, heart health and performance —and turns that science into simple, real-world routines.

She directs the Sleep and Metabolism Lab at Colorado State University, where her team runs clinical and community studies using sleep labs, wearables and continuous glucose monitors to turn complex physiology into practical routines people can follow.

Her work focuses on real-world problems: helping night-shift workers protect their metabolic health, figuring out when to exercise or eat to improve glucose control, and designing achievable sleep strategies for busy families. She collaborates with clinicians and industry partners and has led NIH-funded projects testing schedule-friendly interventions like time-restricted eating and precisely timed exercise routines.

Dr. Broussard is known for translating cutting-edge science into clear, actionable guidance – what to change first, what matters most, and how to sustain it. She speaks frequently about sleep loss, shift work, daylight saving time, jet lag, wearable sensors and women’s health, and she advises organizations on evidence-based policies that align work and school schedules with human biology.

Areas of expertise:
Sleep and circadian rhythms; timing of eating; timing of exercise; metabolic health and type 2 diabetes; wearable sensors (sleep/CGM); behavior change; clinical and community trials.