Mechanical scale and load cell underwater weighing: a comparison of simultaneous measurements and the reliability of methods
Deutscher übersetzter Titel: | Unterwasserwiegen mit einer mechanischen Waage und einer Lastzelle: ein Vergleich simultaner Messungen und die Reliabilität der Methoden |
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Autor: | Moon, Jordan R.; Stout, Jeffrey R.; Walter, Ashley A.; Smith, Abbie E.; Stock, Matt S.; Herda, Trent J.; Sherk, Vanessa D.; Young, Kaelin C.; Lockwood, Christopher M.; Kendall, Kristina L.; Fukuda, David H.; Graef, Jennifer L.; Cramer, Joel T.; Beck, Travis W.; Esposito, Enrico N. |
Erschienen in: | Journal of strength and conditioning research |
Veröffentlicht: | 25 (2011), 3, S. 652-661, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource Elektronische Ressource (online) |
Sprache: | Englisch |
ISSN: | 1064-8011, 1533-4287 |
DOI: | 10.1519/JSC.0b013e3181e99c2d |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201105004729 |
Quelle: | BISp |
Abstract des Autors
Both load cell and mechanical scale-based hydrostatic weighing (HW) systems are used for the measurement of underwater weight. However, there has been no direct comparison of the 2 methods. The purpose of the current investigation was to simultaneously compare a load cell and mechanical scale for use in HW. Twenty-seven men and women (mean ± SD, age: 22 ± 2 years) participated in the 2-day investigation. Each subject completed 2 HW assessments 24 hours apart. Single-day comparisons of all trials for both days revealed no significant difference between the mechanical scale and the load cell (mean difference < 0.016 kg, p > 0.05). True underwater weight values were not significantly different between methods for either days (mean difference < 0.014 kg, p > 0.05) and accounted for a mean difference in percent fat (%FAT) of <0.108%. The 95% limits of agreement indicated a maximum difference between methods of 0.53% FAT. Both methods produced similar reliability SEM values (mechanical SEM < 0.72%FAT, load cell SEM < 0.75%FAT). In conclusion, there was no difference between mechanical scale and load cell measurements of underwater weights and the added precision of the load cell only marginally (<0.16%FAT) improved day-to-day reliability. Either a mechanical scale or load cell can be used for HW with similar accuracy and reliability in young adults with a body mass index of 18.7-34.4 (5-25%FAT). Verf.-Referat