1. What is the Cormic Index?

The Cormic Index is an anthropometric measurement that represents the ratio of sitting height to total standing height, expressed as a percentage. It provides valuable information about body proportions and is widely used in anthropometric studies.

2. How Does the Calculator Work?

The calculator uses the Cormic Index formula:

Where:

• Sitting Height — Measured from sitting surface to top of head (cm)
• Standing Height — Measured from floor to top of head (cm)

Explanation: The index expresses the proportion of the body's height that is made up by the trunk and head, providing insights into body segment proportions.

3. Importance of Cormic Index

Details: The Cormic Index is crucial in anthropometry for assessing body proportions, identifying growth patterns, and understanding ethnic variations in body morphology. It helps in ergonomic design, sports science, and nutritional assessment.

4. Using the Calculator

Tips: Enter sitting height and standing height in centimeters. Both values must be positive numbers, and sitting height should not exceed standing height. Measurements should be taken with proper anthropometric techniques.

5. Frequently Asked Questions (FAQ)

Q1: What is the normal range for Cormic Index?
A: Typical values range from 50-55%, with variations based on age, gender, and ethnicity. Higher values indicate relatively longer trunks, while lower values indicate relatively longer legs.

Q2: How does Cormic Index change with age?
A: The index decreases during childhood as legs grow proportionally faster than the trunk, then stabilizes in adulthood. In elderly individuals, it may decrease due to spinal compression.

Q3: What are the applications of Cormic Index?
A: Used in ergonomics for workstation design, sports science for athlete selection, anthropology for population studies, and clinical settings for growth monitoring.

Q4: Are there ethnic differences in Cormic Index?
A: Yes, populations show variations. For example, some Asian populations tend to have higher indices (shorter legs relative to trunk), while some African populations may have lower indices.

Q5: How should measurements be taken accurately?
A: Use a stadiometer for standing height and a sitting height table for sitting height. Ensure proper posture: head in Frankfort plane, shoulders relaxed, and measurements taken without shoes.