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"F!reF!ghterF!t": Lifestyle Coaching Interventions for Obese Firefighters (FireFit)

"F!reF!ghterF!t": A Randomized Controlled Trial of Lifestyle Coaching Interventions for Obese Firefighters

Who can join

As published by the study on ClinicalTrials.gov. "Not stated" means the study hasn't said — ask the study team.

Age
18 Years to 60 Years
Sex
Male only
Healthy volunteers
Not accepted
Compensation
Not stated

Other requirements are listed under Eligibility below. Only the study team can confirm whether you can join.

What to expect

No one can promise a trial will help you personally — that is what the research is trying to find out.

What participation involves

Not stated in the study description — ask the study team about visits and procedures.

Compensation
Not stated
  • Study-related exams and procedures are typically provided at no cost. This is how many trials work in general — confirm the details for this study with the study team.
  • Participants are monitored closely by the research team throughout the study.
  • Some participants may receive access to an investigational treatment, which is still being studied.
  • Your participation helps researchers learn whether this approach could help future patients.

About this study

In plain language

This study tests 9 months of one-on-one and group lifestyle coaching compared with usual care or written health advice. It is for male firefighters ages 18–60 with obesity. Researchers will track changes in body fat and muscle, other health measures, fitness, and daily habits.

Our goal is to explore the effectiveness of 9- month lifestyle medicine based coaching intervention (individual and group coaching) versus control (usual care/ written health instructions). The primary study outcomes will be mean changes in body composition metrics . Secondary outcomes will be the prevalence of metabolic abnormities, progression/regression of Metabolic Syndrome, push-up \& sit/stand capacity, self-reported physical activity, and quality of life/diet/sleep measures.

Compensation is read from the study's own description and may be missing — always confirm with the study team.

Eligibility

Who can join

  • Male and 18–60 years old.
  • Currently working as a volunteer or career firefighter.
  • Have a body mass index (BMI) of 30 or higher, based on the height and weight you report. BMI is a measure of weight compared with height.
  • Interested in a study to help with weight loss, how the body uses food for energy, and quality of life.
  • Live or work in Massachusetts, Rhode Island, or southern New Hampshire in the Boston metro area.

Who can't join

  • Female, or have a BMI below 30.
  • Have active psychosis, a condition that makes it hard to tell what is real.
  • Have had a major heart or blood vessel event, such as a heart attack, the heart stopping, or a stroke, or have one during the study.
  • Have had cancer or are diagnosed during the study, except for non-melanoma skin cancer.
  • Have certain liver blood test results at least 3 times the upper normal limit, before or during the study.
  • Have very low kidney function before or during the study: a kidney filtering rate (eGFR) of 30 or less.
  • Use testosterone treatment or medicines for weight loss or that cause weight gain, or have used them in the past 6 months.
  • Are not willing to follow the study treatment or care plan you may be assigned.

Simplified for readability. The official criteria below are what the study team uses.

Official eligibility criteria

Inclusion Criteria: * Male firefighters aged 18-60 years * Currently active as volunteer or career firefighters * Body mass index (BMI) ≥30 kg/m² based on self-reported height and weight * Express interest in participating in a clinical study aimed at improving body composition (weight loss), metabolic status, and quality of life * Residing and/or working in Massachusetts, Rhode Island, or Southern New Hampshire (Boston metro area) Exclusion Criteria: * Female sex\* * BMI \<30 kg/m² based on self-reported height and weight * Active psychosis * History or diagnosis (during the RCT) of any of the following: Major cardiovascular disease event (e.g., myocardial infarction, cardiac arrest, cerebrovascular accident) Cancer (excluding non-melanoma skin cancer) Abnormal liver function (aminotransferase, bilirubin, or alkaline phosphatase ≥3× the upper limit of normal) Renal dysfunction (estimated glomerular filtration rate ≤30 mL/min/1.73 m²) * Current or recent (within 6 months) use of testosterone treatment or anti-obesity/obesogenic medications * Unwillingness to adhere to potential intervention assignments * Because this is an exploratory study, the number of subjects is limited, and men make up roughly 85% of the US fire service, the current proposal is limited to men. In future studies, we will include women firefighters.

Study sites (1)

MA