1. What is the Jackson-Pollock 7-Site Method?

The Jackson-Pollock 7-site method is a skinfold measurement technique that estimates body fat percentage by measuring subcutaneous fat at seven specific locations on the body. It's widely used in fitness and health assessments.

2. How Does the Calculator Work?

The calculator uses the Jackson-Pollock equations:

Where:

• \( Sum7 \) — Sum of 7 skinfold measurements (mm)
• \( Age \) — Age in years
• \( BD \) — Body density (g/cm³)
• \( BF\% \) — Body fat percentage

Explanation: The equation first calculates body density from skinfold measurements and age, then converts this to body fat percentage using the Siri equation.

3. Importance of Body Fat Measurement

Details: Body fat percentage is a more accurate indicator of fitness than body weight alone. It helps assess health risks, track fitness progress, and guide nutrition and training programs.

4. Using the Calculator

Tips: Enter the sum of 7 skinfold measurements in mm, age in years, and select gender. The 7 skinfold sites are: chest, midaxillary, triceps, subscapular, abdomen, suprailiac, and thigh.

5. Frequently Asked Questions (FAQ)

Q1: What are the 7 measurement sites?
A: Chest, midaxillary, triceps, subscapular, abdomen, suprailiac, and thigh.

Q2: How accurate is this method?
A: When performed by a trained professional, it's about 3-5% margin of error compared to DEXA scans.

Q3: What are healthy body fat percentages?
A: For men: 6-24%; For women: 16-30% (varies by age and fitness level).

Q4: Can I use this for athletes?
A: Yes, but some sport-specific equations might be more accurate for elite athletes.

Q5: How often should measurements be taken?
A: Every 4-8 weeks to track progress, preferably by the same trained professional.