Fitness Index Calculator

Formula

To calculate the Fitness Index (\(FI\)):

\[ FI = \frac{HR_{max} - HR_{rest}}{Age - Weight} \]

Where:

\(FI\) is the Fitness Index
\(HR_{max}\) is the maximum heart rate (beats per minute)
\(HR_{rest}\) is the resting heart rate (beats per minute)
Age is the individual's age (years)
Weight is the individual's weight (kilograms)

What is a Fitness Index?

A Fitness Index is a numerical value that represents an individual's overall physical health and fitness level. It is typically calculated based on various factors such as age, gender, body mass index (BMI), cardiovascular endurance, muscular strength, flexibility, and other health-related parameters. The higher the fitness index, the better the individual's physical fitness and health. This index can be used to track fitness progress over time, identify areas for improvement, and establish fitness goals.

Example Calculation 1

Let's assume the following values:

Maximum Heart Rate (\(HR_{max}\)) = 180 beats per minute
Resting Heart Rate (\(HR_{rest}\)) = 60 beats per minute
Age = 30 years
Weight = 70 kg

Using the formula:

\[ FI = \frac{180 - 60}{30 - 70} = \frac{120}{-40} = -3 \]

The Fitness Index is -3.

Example Calculation 2

Let's assume the following values:

Maximum Heart Rate (\(HR_{max}\)) = 190 beats per minute
Resting Heart Rate (\(HR_{rest}\)) = 50 beats per minute
Age = 25 years
Weight = 60 kg

Using the formula:

\[ FI = \frac{190 - 50}{25 - 60} = \frac{140}{-35} = -4 \]

The Fitness Index is -4.