Important Health Information

Please read this carefully before starting your fitness journey.

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Talk to Your Doctor First

High-intensity training isn't for everyone. Get medical clearance before you start.

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Stop If Something Feels Wrong

Chest pain, severe shortness of breath, or dizziness? Stop immediately and seek help.

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Not Medical Advice

Heart rate calculations are estimates. This app displays workouts—it doesn't replace your doctor.

Medical Disclaimer

Last Updated: November 2025

Consult Your Physician

Before beginning any exercise program, especially high-intensity interval training (HIIT), consult with your physician or qualified healthcare provider. This is particularly important if you have any existing medical conditions, are over 40 years of age, have been inactive for an extended period, or are pregnant or nursing.

Not for Pregnant Women

This app is not intended for use by pregnant women. High-intensity interval training may pose risks during pregnancy. If you are pregnant or nursing, consult your healthcare provider before engaging in any exercise program.

Not a Medical Device

4x4 HIIT is a fitness coaching tool designed for educational and training purposes only. It is not intended to diagnose, treat, cure, or prevent any disease or medical condition. This app should not be used as a substitute for professional medical advice.

Heart Rate Calculations

The heart rate calculations provided by this app (using the formula 220 - age) are estimates and may not be accurate for everyone. Actual maximum heart rate can vary significantly between individuals. For a more accurate assessment, consult with a healthcare professional or undergo exercise testing.

Stop If You Feel Unwell

If you experience any of the following symptoms during exercise, stop immediately and seek medical attention:

Chest pain or tightness
Severe shortness of breath
Dizziness or lightheadedness
Nausea or vomiting
Unusual or irregular heartbeat
Any other unusual symptoms

Listen to your body and do not push beyond your safe limits.

Assumption of Risk

By using 4x4 HIIT, you acknowledge that physical exercise involves inherent risks of injury. You voluntarily assume all risks associated with using this app and participating in the suggested workouts. Always exercise in a safe environment and use appropriate equipment.

No Guarantee of Results

This app does not guarantee any specific fitness results or health outcomes. Individual results will vary based on numerous factors including current fitness level, consistency, nutrition, genetics, and overall health status.

Limitation of Liability

SIA Valabijs (Reg. No. 40203667525) and 4x4 HIIT do not assume any liability for injury, death, or adverse health outcomes that result from using this application. Use of this app is entirely at your own risk.

By continuing to use this app, you acknowledge that you have read and understood this medical disclaimer.