Assessment of Fat Mass Index and Fat-Free Mass Index in Young Athletes

Liga Kalnina, Guntars Selga, Melita Sauka, Viesturs Larins

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

Fat mass (FM) and percentile body fat (% BF) is commonly used as an assessment tool, especially to
evaluate nutrition status of children. As the body mass index is linked with height, it is possible to calculate fat mass index (FMI) and fat-free mass index (FFMI). FMI or FFMI can be used to assess changes in fat-free mass linked to growth; whether there is a change due to shorter height or to a change in body composition.
The data presented were gathered as part of health check-ups by specially-trained medical team of
the State Sport Medicine Centre between 2008 and 2012. The study population comprised 6,048 young athletes (4,249 boys and 1,799 girls) aged 10–17 years. During the study period, 13,788 measurements were taken (9,813 on boys and 3,975 on girls). The athletes represented 27 different sports divided into three groups according to weight control practices. Body mass and total body fat was measured using multi frequency 8-polar bioelectrical impedance analyser (X–Scan pluss II, Korea).
Mean of FFMI varies from 17.33 kg/m2 at 10 years of age to 19.52 kg/m2 at 17 years of age for
males in group I; from 16.44 kg/m2 to 18.51 kg/m2 in group II; and from 16.77 kg/m2 to 19.05 kg/m2 in group III, accordingly. Mean of FFMI for female varies from 15.73 kg/m2 to 17.17 kg/m2 in group I; from 14.20 kg/m2 to 16.07 kg/m2 in group II; and from 15.30 kg/m2 to 16.50 kg/m2 in group III, accordingly.
Mean of FMI in young male athletes varies from 5.84 kg/m2 at 10 years of age to 4.57 kg/m2 at
17 years of age for males in group I; from 4.02 kg/m2 to 3.69 kg/m2 in group II; and from 4.59 kg/m2 from to 4.07 kg/m2 in group III, accordingly. In female young athletes’ population, FMI varies from 8.69 kg/m2 to 7.59 kg/m2 in group I; from 6.40 kg/m2 to 6.81 kg/m2 in group II, and from 7.63 kg/m2 to 7.37 kg/m2 in group III, accordingly.
Developed assessment scales of FMI and FFMI for young athletes can be used in daily practice to
evaluate height-independent fat and fat-free (lean) mass to prevent negative impact on health linked with nutritional status and physical load.
Original languageEnglish
Title of host publicationRīga Stradiņš University Collection of Scientific Papers 2017
Subtitle of host publicationResearch articles in medicine & pharmacy
Place of PublicationRīga
PublisherRīga Stradiņš University
Pages28-35
ISBN (Print)978-9934-563-21-8
Publication statusPublished - 2018

Publication series

NameCollection of Scientific Papers
PublisherRiga Stradins University
ISSN (Print)1691-497X

Keywords*

  • young athletes
  • fat mass index
  • fat-free mass index

Field of Science*

  • 3.2 Clinical medicine

Publication Type*

  • 3.2. Articles or chapters in other proceedings other than those included in 3.1., with an ISBN or ISSN code

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