We selected 2 preferred anatomical areas: the intra-abdominal area, which is often associated with metabolic risk factors, 16 –, 18 and the midthigh area ( Figure 1). A transducer probe emits, through the skin, an ultrasonic wave, part of which is reflected in the fat-muscle interface. The ultrasonic technique can be used to measure the thickness of fat between the skin and the muscle. Ultrasound measurements were taken using a sonographic GEM in A mode (TEA Company, Vandoeuvre-les-Nancy, France). We wished to extend the application of our device by establishing a new predictive model to measure body composition of top athletes. Our purpose, therefore, was to determine total BF using the portable UT device. 9 –, 14 However, none of these authors have compared the technique with fan-beam DEXA. It should be noted that, until now, the UT has often been used for local measurements, specifically for the quantification of visceral fat in order to study android obesity. This technique has also been used to measure subcutaneous fat thickness and to determine total body density and total BF%. These measurements were taken at specific points on all participants for the estimation of BF, BF%, and FFM. The portable UT measures the thickness of subcutaneous fat. Body fat percentage estimates by UT were more accurate than those obtained with air-displacement plethysmography or BIA, regardless of sex.Ī cross-validation study between UT and the DEXA reference was carried out and the results compared on 93 athletes. Pineau et al 6 cross-validated the portable ultrasound technique (UT), air-displacement plethysmography, and bioelectric impedance (BIA) with fan-beam, dual-energy X-ray absorptiometry (DEXA) in 89 healthy volunteers. To evaluate BF percentage (BF%), a noninvasive portable ultrasound device that measures the thickness of subcutaneous fat and has been validated on sedentary participants can be used. Optimizing these components is essential for improving physical training for each athlete. For that purpose, knowledge of body composition in relation to total body fat (BF) and fat-free mass (FFM) is required. 4, 5 It is, therefore, necessary to determine each athlete's ideal weight category. This weight loss is difficult for many athletes because it often results in poorer performances. 1 –, 3 Just before a competition, some athletes need to lose a large quantity of body weight in a short period of time. In sport disciplines with weight categories, assessing individual weight fluctuations and their consequences on body composition is important to optimize the performances of athletes during competitions. Compared with dual-energy X-ray absorptiometry testing, the new portable ultrasound device provided very accurate estimates of body fat percentage.
0 Comments
Leave a Reply. |