Participants will complete a single supervised, online high intensity interval training (HIIT) exercise session with six bouts of 1-minute exercises performed at a moderate-to-high intensity lasting approximately 20 minutes. Saliva samples will be collected immediately prior to exercise, immediately following exercise, and 15 minutes post-exercise.

Participants will complete a single supervised, online high intensity interval training (HIIT) exercise session lasting approximately 20 minutes. The exercise protocol consists of six 1-minute bouts with 1-minute rest intervals of moderate to high intensity bodyweight exercises, including movements such as lateral squats, wall pushups, and chair assisted sit to stands.

Protocol Completion Rate is defined as the proportion of enrolled participants who complete both the supervised home-based HIIT exercise session and return all scheduled saliva samples to the laboratory.

Acceptability will be assessed using a participant-reported questionnaire adapted from the Theoretical Framework of Acceptability (TFA). The questionnaire evaluates acceptability across seven domains: affective attitude, burden, perceived effectiveness, ethicality, intervention coherence, opportunity costs, and self-efficacy. Each domain is assessed using 1-2 items rated on a 5-point Likert scale (1 = strongly disagree to 5 = strongly agree). Domain scores are averaged, and an overall Acceptability Index score is calculated, with higher scores indicating greater acceptability.