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The Slimguide is the best inexpensive caliper available (About $20), but it wasn't designed for you to measure your own body fat. You'll need someone to measure you with this caliper. Other models of body fat calipers (if you want to splurge), range from $150 to $450. (At our health clubs, I use the electronic rollin fatties "SKYNDEX" caliper with the 4-site "Durnin formula.") The calipers come with instructions, or you can use these formulas, which I have used and rollin fatties found to be very accurate: 4 Site formula for men (abdomen, rollin fatties suprailiac, thigh, tricep) % fat = .29288(sum of 4 skinfolds) - 0.0005(sum of four skinfolds squared) + 0.15845(age) - 5.76377 4-Site Formula for women (abdomen, suprailiac, thigh, tricep) % Fat = (.29669)(sum of 4 skinfolds) - (.00043)(Sum of four skinfolds squared) + .02963(age) + 1.4072 Source: Jackson A S, Pollock, M (1985) Practical assessment of body composition. Physician Sport Med. 13: 76-90. Body fat percentages vary based on age and gender, but 20-25% body fat is average for women (15-19% is ideal), while 15-20% is average for men (10-14% is ideal).
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