Resumen: Anthropometry, dual energy x-ray absorptiometry (DXA) and air displacement plethysmography (ADP) are widely used for assessing body fat percentage (%BF). The accuracy among body composition methods in different kind of populations such as children, adults, obese persons, and athletes has been studied but there are some discrepancies between them.
PURPOSE: To compare %BF assessed by DXA, ADP and anthropometry in adolescent soccer players.
METHODS: %BF was assessed in ninety-two soccer players (64 males, 13.3 ± 0.5 y; 28 females, 13.3 ± 0.6 y) by anthropometry, DXA and ADP. Anthropometry measurements were registered following the recommendations of the ISAK. Anthropometry %BF was calculated using the equation proposed by Slaughter et al for adolescents. ADP %BF was calculated with 3 different formulas: (i) the general Siri equation (ADPSiri); (ii) the age- and sex-specific equation by Lohman (ADPLohman) and (iii) the age- and sex-specific equation by Silva (ADPSilva). Agreement and differences between methods were assessed by two-paired samples t tests and calculating the 95% limits of agreement.
RESULTS: In the whole sample, ADPSiri ADPLohman ADPSilva and anthropometry underestimated %BF by 2.0, 6.9, 6.2, and 6.0% respectively compared to DXA (all p<0.05). The 95% limits of agreement ranged from ±5.91% to ±10.78%. Similar results dividing by sex were found.
CONCLUSION: Although the 3 used methodologies have been several times described as valid for the assessment of %BF, based in our data it seems that ADP, anthropometry and DXA are not interchangeable for the assessment of %BF in adolescent soccer players. Idioma: Inglés DOI: 10.1249/01.mss.0000487965.17864.98 Año: 2016 Publicado en: MEDICINE AND SCIENCE IN SPORTS AND EXERCISE 48, 5 (2016), 986-987 ISSN: 0195-9131 Factor impacto JCR: 4.141 (2016) Categ. JCR: SPORT SCIENCES rank: 6 / 81 = 0.074 (2016) - Q1 - T1 Factor impacto SCIMAGO: 2.052 - Orthopedics and Sports Medicine (Q1) - Sports Science (Q1) - Physical Therapy, Sports Therapy and Rehabilitation (Q1)