Abdominal : Vertical fold 2 cm to right of umbilicus (men only).
Triceps : Vertical fold on posterior midline of arm, halfway between acromion and olecranon processes. Arm should be held freely at side of body (women only).
Chest : Diagonal fold one-half distance between anterior axillary line and nipple (men only)
Suprailiac : diagonal fold (45 degree angle) in line with natural line of iliac crest, taken at anterior axillary line immediately superior to iliac crest (women only).
Thigh : Vertical fold on anterior midline of thigh, midway between proximal border of patella and inguinal crease (men and women).
Figure 1. Anatomical site location
Data Collection Procedures:
Pinch site with your left thumb and forefinger. Roll to ensure you have only skin and subcutaneous tissue.
Hold calipers in your right hand, open the jaws, and place heads 1 cm away from your pinch. Placement should be ‘as deep as the pinch is wide’.
Maintain the pinch with your finger and thumb as you allow caliper reading to stabilize.
Read within 1-2 seconds – no longer
Record measurement to nearest 0.5 mm
Rotate through the sites to allow skin to stabilize
Take duplicate measurements at each site. If readings are more than 1 mm apart, take a third measurement, and record.
Suprailiac Triceps Abdomen (but use vertical fold!) Thigh Chest
Data Reduction and Consultation Procedures:
Enter all skin fold measurements into excel spreadsheet.
The program uses the Jackson and Pollock equations for men and women and calculates percent fat, fat weight and fat-free weight.
Record the percentage body fat, fat weight and fat-free weight on the form in the space provided. Refer to TABLE 1 (ACSM tables 4-3 and 4-4) for norms (percentile rank) and standards (risk stratification). Record this information on the form.
Discuss with your participant his/her results and body composition goals.
Determine a range for goal percentage body fat. If a subject is currently at the 50th percentile, you might suggest the percentage fat equivalent to the 60th percentile.
Calculate a range of goal weight based on the goal percentage body fat, using the following formula. Noah can enter this formula on the excel spreadsheet as well.
Goal body weight = Fat-free weight / (1.0 – goal % fat as decimal)