Medical Disclaimer

About Our Calculators

GetFit Matics provides fitness and health calculators based on widely accepted mathematical formulas used in sports science and nutrition research. These include:

• The Mifflin-St Jeor equation for BMR/calorie estimation
• The WHO BMI classification system
• The US Navy circumference method for body fat estimation
• The Karvonen method for heart rate zone calculation
• The Epley, Brzycki, and Lander formulas for 1RM estimation

Accuracy and Limitations

While these formulas are evidence-based and widely used, all calculator results are estimates only. Individual results vary based on factors including but not limited to:

• Individual metabolic variation (±15–20% from formula predictions)
• Measurement accuracy (height, weight, body circumferences)
• Genetic factors affecting metabolism, body composition, and performance
• Medical conditions, medications, and hormonal factors
• Age-related metabolic changes

Who Should Consult a Doctor Before Using These Results

You should always consult a qualified healthcare professional before making changes to your diet or exercise routine if you:

• Have any pre-existing medical condition (diabetes, heart disease, hypertension, kidney disease, etc.)
• Are pregnant or breastfeeding
• Are under 18 or over 65 years of age
• Are currently taking prescription medications
• Have a history of eating disorders
• Have recently had surgery or illness
• Have a BMI below 17 or above 35

Calorie and Diet Recommendations

The calorie targets generated by our calculators are estimates for healthy adults. Do not follow any restrictive diet or create a large caloric deficit without medical supervision. Extreme calorie restriction can lead to:

• Muscle loss and metabolic slowdown
• Nutritional deficiencies
• Hormonal disruption
• Gallstone formation
• Eating disorder development or exacerbation

Exercise and Fitness Recommendations

The exercise-related information on GetFit Matics is intended for generally healthy adults. Heart rate zones, 1RM percentages, and training recommendations should be adapted to your individual fitness level and health status. Stop any exercise immediately and seek medical attention if you experience: chest pain, dizziness, severe shortness of breath, unusual pain, or heart palpitations.

BMI Limitations

BMI is a population-level screening tool with significant individual limitations. It should never be used as the sole measure of health. Our BMI Guide explains these limitations in detail.

No Doctor-Patient Relationship

Use of GetFit Matics does not create a doctor-patient or health professional-client relationship. The website provides general educational information only.

Professional Consultation

We strongly recommend working with:

• A Registered Dietitian (RD/RDN) for personalized nutrition plans
• A Certified Personal Trainer (CPT) for exercise programming
• Your primary care physician for weight management and health monitoring
• A sports medicine physician for athletic performance concerns

GetFit Matics is not affiliated with any healthcare organization. All formulas and health information are provided in good faith based on current scientific literature but should not replace individualized professional assessment.