A Multi-language Smartphone-based Healthy Lifestyle Intervention for Firefighters

The participants will maintain a quiet sitting posture for at least five minutes, and the measurement will be taken on a healthy arm without any prior surgery or disease. The blood pressure measuring device will be calibrated and will automatically take three measurements, with a one-minute interval between each. The average blood pressure value will be recorded.

The participants will be asked to complete questionnaires measuring depressive symptoms, which includes the Beck Depression Inventory for Primary Care (BDI-PC) and the Patient Health Questionnaire (PHQ-9). Questions related to self-harm thoughts have been removed from these instruments to eliminate the need for further referrals. Higher scores indicate greater depressive symptoms.

The participants will be asked to complete a Posttraumatic Stress Disorder Checklist (PCL-5) questionnaire which measures posttraumatic stress disorder symptoms. Questions related to self-harm thoughts have been removed from these instruments to eliminate the need for further referrals. Higher scores indicate greater depressive symptoms.

The body mass index (BMI) will be calculated by dividing the weight in kilograms by the square of the height in meters. The height will be self-reported before the intervention and measured to the nearest 0.1 cm while standing upright using a tape measure 3 to 6 months post-intervention, and the weight will be self-reported before the intervention, and measured to the nearest 0.1 kg with a weighing scale 3 to 6 months post-intervention.

The investigators will ask if the participants had quit or stopped using tobacco in a questionnaire to verify their smoking habits.

The investigators will utilize a Traditional Chinese version of the Mediterranean Diet Score (MDS), consisting of 14 binary questions to determine adherence to the Mediterranean diet pattern.

The investigators will assess overall physical activity levels over the past 6 months using a Chinese version of a validated physical activity rating (PA-R) questionnaire which our team translated.

The investigators will ask the participant with the question "Indicate the total number of hours sitting per week"

The investigators will ask the participant with the question "Please indicate the total hours of actual sleep in a typical 24-hour period in week"

The investigators will ask the participant with the question "How many times do you take a nap per week?"

Biochemical parameters will be measured by the cobas b 101 blood testing system (F. Hoffmann-La Roche AG, Basel, Switzerland) with the participants fingertip blood after a 8-hour fasting.

Biochemical parameters will be measured by the cobas b 101 blood testing system (F. Hoffmann-La Roche AG, Basel, Switzerland) with the participants fingertip blood after a 8-hour fasting.

Biochemical parameters will be measured by the cobas b 101 blood testing system (F. Hoffmann-La Roche AG, Basel, Switzerland) with the participants fingertip blood after a 8-hour fasting.

The participants will provide their semi-annual evaluation reports, including performance metrics in standing long jump, overhead back toss, deadlift, cliffhanger pull-up, 6-meter out-and-back run, farmer's walk, and 1,500-meter run

Biochemical parameters will be measured by the Cobas h 232 blood testing system (F. Hoffmann-La Roche AG, Basel, Switzerland) with the fingertip blood of participants with hypertension.