Resistance Exercise and Sleep Quality by Chronotype

Inclusion Criteria: * Age between 18 and 35 years * Generally healthy, with mild to moderate sleep disturbance as categorized by the Pittsburgh Sleep Quality Index (PSQI) * Body Mass Index (BMI) \< 35 kg/m² * No physical or organic limitations or diseases that would prevent participation in physical activity * Non-smoker and non-alcoholic * Caffeine consumption ≤ 2 cups per day (including coffee and energy drinks) * Have not participated in more than 60 minutes/week of usual moderate-to-vigorous physical activity in the past 6 months, categorized as "moderate" on the International Physical Activity Questionnaire-Short Form (IPAQ-SF) * No clinically diagnosed sleep apnea or other medical/psychiatric disorders responsible for sleep complaints * Regular sleep schedule (no night shifts or transmeridian travel) in the 30 days prior to study enrollment * Able to speak and write English Exclusion Criteria: * Current use of medications or psychotherapeutic drugs for insomnia or other psychiatric disorders * Use of melatonin or other sleep aids in the past month * Currently performing any aerobic or mind-body exercise classes (e.g., yoga, Pilates) * Habitual daytime napping * History of epilepsy or other convulsive disorders * Pregnant individuals * Habitual or recent use (within the past 30 days) of illegal drugs, psychotropic drugs, hypnotics, stimulants, or analgesics