Which body composition assessment method is low-cost but not accurate for certain groups?

The method of skinfold measures is indeed low-cost and widely used for assessing body composition. Skinfold measurements rely on the use of calipers to pinch and measure the thickness of subcutaneous fat at specific sites on the body. This method is accessible and affordable, making it popular in various settings, such as fitness centers or clinics.

However, while skinfold assessments can provide estimates of body fat percentage, their accuracy can be influenced by several factors, including the skill of the person taking the measurements, the hydration status of the individual, and the specific population being tested. For certain groups, such as individuals with obesity or those with higher muscle mass, the actual body fat percentage may not be accurately reflected. Consequently, variations in body composition, age, sex, and ethnicity can lead to inconsistencies and reduced accuracy compared to other more sophisticated methods like DXA or underwater weighing.

In summary, skinfold measures are considered a low-cost option for body composition assessment but may lack accuracy for certain populations due to the inherent limitations of the technique.