Target Heart Rate Calculator

Optimize cardiorespiratory intensity. Maps moderate and vigorous cardiovascular training zones based on AHA guidelines.

Calculate Target Zones

Enter your age on the left to map your target cardiovascular training zones.

Table of Contents

1. Target Heart Rate and Exercise Intensity

Your **Target Heart Rate (THR)** represents the ideal beats-per-minute range to achieve during cardiovascular exercise. Training within this target range helps ensure your workout is intense enough to stimulate cardiovascular adaptations without putting excessive stress on your heart.

THR is expressed as a percentage of your **Maximum Heart Rate (MHR)**. Keeping your heart rate within this zone helps optimize aerobic conditioning and supports safe, effective workouts.

2. American Heart Association (AHA) Guidelines

The American Heart Association (AHA) recommends the following target heart rate zones based on exercise intensity:

  • Moderate Exercise Intensity: 50% to 70% of your maximum heart rate. This zone is ideal for building base endurance and general fitness.
  • Vigorous Exercise Intensity: 70% to 85% of your maximum heart rate. This zone is suited for improving aerobic capacity and performance.

To view a more detailed breakdown of training zones, try our Heart Rate Zone Calculator.

3. Moderate vs. Vigorous Cardiovascular Zones

Training at different intensities stimulates distinct cardiovascular and metabolic adaptations:

  • Moderate Cardio Zone (50%-70%): Lower intensity training that relies primarily on fat oxidation for fuel. It is highly sustainable and supports active recovery. Estimate your active calorie burn using our Calories Burned Calculator.
  • Vigorous Cardio Zone (70%-85%): Higher intensity training that relies more on carbohydrates for fuel. It helps increase lactate threshold and VO2 max. Check your running or walking pace targets with our Pace Calculator.

4. Developing Cardiorespiratory Endurance

To build cardiorespiratory endurance, include a mix of moderate and vigorous workouts in your routine. Combining steady-state cardio with high-intensity interval training (HIIT) can help improve cardiovascular capacity. Track your oxygen consumption capacity using our VO2 Max Calculator.