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Body composition in male elite athletes, comparison of bioelectrical impedance spectroscopy with dual energy X-ray absorptiometry.

Svantesson U, Zander M, Klingberg S, Slinde F - J Negat Results Biomed (2008)

Bottom Line: The results showed that BIS underestimates the proportion of fat mass by 4.6% points in the ice hockey players.In soccer players the BIS resulted in a lower mean fat mass by 1.1% points.Body composition results assessed by BIS in elite athletes should be interpreted with caution, especially in individual subjects.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Clinical Nutrition, Sahlgrenska Academy, University of Gothenburg, Sweden. ulla.svantesson@fhs.gu.se

ABSTRACT

Background: The aim of this study was to compare body composition results from bioelectrical spectroscopy (BIS) with results from dual energy X-ray absorptiometry (DXA) in a population of male elite athletes. Body composition was assessed using DXA (Lunar Prodigy, GE Lunar Corp., Madison, USA) and BIS (Hydra 4200, Xitron Technologies Inc, San Diego, California, USA) at the same occasion. Agreement between methods was assessed using paired t-tests and agreement-plots.

Results: Thirty-three male elite athletes (soccer and ice hockey) were included in the study. The results showed that BIS underestimates the proportion of fat mass by 4.6% points in the ice hockey players. In soccer players the BIS resulted in a lower mean fat mass by 1.1% points. Agreement between the methods at the individual level was highly variable.

Conclusion: Body composition results assessed by BIS in elite athletes should be interpreted with caution, especially in individual subjects. BIS may present values of fat mass that is either higher or lower than fat mass assessed by DXA, independent of true fat content of the individual.

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Differences between proportion of fat mass assessed by BIS and DXA plotted against average of proportion of fat mass assessed by BIS and DXA in 17 male elite soccer players and 16 male elite ice hockey players. Lines indicates mean ± 2 SD.
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Figure 1: Differences between proportion of fat mass assessed by BIS and DXA plotted against average of proportion of fat mass assessed by BIS and DXA in 17 male elite soccer players and 16 male elite ice hockey players. Lines indicates mean ± 2 SD.

Mentions: The Bland-Altman plots presented in Figure 1 shows that BIS underestimates the proportion of fat mass by 4.6% points in the ice hockey players. In soccer players the BIS resulted in a lower mean fat mass by 1.1% points. Agreement between the methods at the individual level is highly variable with the largest difference between methods seen in a male ice hockey player where BIS underestimated the proportion of fat mass by 12.1% points. The largest individual overestimation of fat mass by BIS was found in a soccer player having a fat mass of 5% assessed by DXA and 11% assessed by BIS, a difference of 6% points.


Body composition in male elite athletes, comparison of bioelectrical impedance spectroscopy with dual energy X-ray absorptiometry.

Svantesson U, Zander M, Klingberg S, Slinde F - J Negat Results Biomed (2008)

Differences between proportion of fat mass assessed by BIS and DXA plotted against average of proportion of fat mass assessed by BIS and DXA in 17 male elite soccer players and 16 male elite ice hockey players. Lines indicates mean ± 2 SD.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2267441&req=5

Figure 1: Differences between proportion of fat mass assessed by BIS and DXA plotted against average of proportion of fat mass assessed by BIS and DXA in 17 male elite soccer players and 16 male elite ice hockey players. Lines indicates mean ± 2 SD.
Mentions: The Bland-Altman plots presented in Figure 1 shows that BIS underestimates the proportion of fat mass by 4.6% points in the ice hockey players. In soccer players the BIS resulted in a lower mean fat mass by 1.1% points. Agreement between the methods at the individual level is highly variable with the largest difference between methods seen in a male ice hockey player where BIS underestimated the proportion of fat mass by 12.1% points. The largest individual overestimation of fat mass by BIS was found in a soccer player having a fat mass of 5% assessed by DXA and 11% assessed by BIS, a difference of 6% points.

Bottom Line: The results showed that BIS underestimates the proportion of fat mass by 4.6% points in the ice hockey players.In soccer players the BIS resulted in a lower mean fat mass by 1.1% points.Body composition results assessed by BIS in elite athletes should be interpreted with caution, especially in individual subjects.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Clinical Nutrition, Sahlgrenska Academy, University of Gothenburg, Sweden. ulla.svantesson@fhs.gu.se

ABSTRACT

Background: The aim of this study was to compare body composition results from bioelectrical spectroscopy (BIS) with results from dual energy X-ray absorptiometry (DXA) in a population of male elite athletes. Body composition was assessed using DXA (Lunar Prodigy, GE Lunar Corp., Madison, USA) and BIS (Hydra 4200, Xitron Technologies Inc, San Diego, California, USA) at the same occasion. Agreement between methods was assessed using paired t-tests and agreement-plots.

Results: Thirty-three male elite athletes (soccer and ice hockey) were included in the study. The results showed that BIS underestimates the proportion of fat mass by 4.6% points in the ice hockey players. In soccer players the BIS resulted in a lower mean fat mass by 1.1% points. Agreement between the methods at the individual level was highly variable.

Conclusion: Body composition results assessed by BIS in elite athletes should be interpreted with caution, especially in individual subjects. BIS may present values of fat mass that is either higher or lower than fat mass assessed by DXA, independent of true fat content of the individual.

Show MeSH