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Jackson-Pollock Approximate Equation:
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The Jackson-Pollock approximate equation estimates body fat percentage for women using the sum of skinfold measurements and age. It provides a practical method for assessing body composition without requiring complex equipment.
The calculator uses the Jackson-Pollock approximate equation:
Where:
Explanation: The equation accounts for the relationship between subcutaneous fat (measured by skinfolds) and total body fat percentage, with an adjustment for age-related changes in body composition.
Details: Body fat percentage is a key indicator of health and fitness. It provides more accurate information about body composition than body weight alone, helping to assess health risks and track fitness progress.
Tips: Enter the sum of skinfold measurements in millimeters (typically sum of triceps, thigh, and suprailiac measurements), and age in years. All values must be valid (skinfolds > 0, age between 1-120).
Q1: How should skinfold measurements be taken?
A: Measurements should be taken with proper calipers at standard sites (typically triceps, thigh, and suprailiac) by a trained professional for accuracy.
Q2: What are healthy body fat percentage ranges for women?
A: Essential fat: 10-13%, Athletes: 14-20%, Fitness: 21-24%, Average: 25-31%, Obese: 32%+ (varies by age).
Q3: How does this compare to other body fat calculation methods?
A: Skinfold equations are reasonably accurate (±3-5%) when performed correctly, but DEXA scans or hydrostatic weighing are more precise.
Q4: Are there limitations to this equation?
A: Less accurate for very lean or obese individuals, and results may vary based on measurement technique and site selection.
Q5: How often should body fat percentage be measured?
A: For tracking changes, every 4-8 weeks is sufficient as body composition changes slowly with diet/exercise.