1. What is the Ape Index?

The Ape Index is a measure of the ratio of arm span relative to height. It's commonly used in sports like climbing and swimming to assess potential athletic advantages.

2. How Does the Calculator Work?

The calculator uses the Ape Index equation:

Where:

• \( span \) — Arm span measurement (cm)
• \( height \) — Height measurement (cm)

Explanation: A positive value indicates an arm span longer than height, while a negative value indicates shorter arm span than height.

3. Importance of Ape Index

Details: The Ape Index is particularly relevant in sports where reach is advantageous. It can indicate natural biomechanical advantages in certain activities.

4. Using the Calculator

Tips: Measure arm span from fingertip to fingertip with arms outstretched horizontally. Height should be measured without shoes. Both measurements should be in centimeters.

5. Frequently Asked Questions (FAQ)

Q1: What is a normal Ape Index?
A: Most people have an Ape Index around 0% (span ≈ height). Values between -5% to +5% are considered normal.

Q2: Why is it called Ape Index?
A: The term comes from the observation that apes typically have longer arms relative to their height compared to humans.

Q3: Which sports benefit from positive Ape Index?
A: Sports like rock climbing, swimming, and basketball often see advantages from longer reach relative to height.

Q4: How accurate does measurement need to be?
A: For meaningful results, measurements should be precise to within 1 cm for both span and height.

Q5: Can Ape Index change with age?
A: In adults, the ratio remains relatively stable, though posture can affect measurements. In children, proportions change during growth.