Pòster presentat a la I Jornada Catalana de Recerca en Ciències de l’Activitat Física i l’Esport

1. Whole-body and localized bioelectrical impedance vector
analysis (BIVA) in professional soccer players
Molina S, Balcells J, Solà-Perez T, Castizo-Olier J, Vives M, Irurtia A.
INTRODUCTION
During soccer matches, dehydration due
to sweat loss could be substantial1. It
decreases the physical and mental
performance2 and could lead to injuries3.
Bioelectrical impedance vector analysis
(BIVA) emerges as a relative novel
technique4, precise, accurate, reliable,
non-invasive, portable, inexpensive, safe
and simple to assess the hydration status
in real time5, without algorithm-inherent
errors or requiring assumptions such as
constant tissue hydration6.
AIM
To characterize the whole-body and
muscle-localized bioelectrical profile of a
group of professional soccer players.
METHODS
22 male professional soccer players
(aged: 26.1±3.5 years; height: 183.3±7.8
cm; weight: 77.9±6.2 kg; BMI: 23.2±0.8
kg/m2).
A 50 kHz, phase-sensitive bioimpe-
dance analyzer (BIA-101 ASE; Akern Srl)
was used to measure resistance (R) and
reactance (Xc).
Whole-body and muscle-localized
impedance vectors (quadriceps and
hamstring, dominant and non-
dominant) were analysed.
Descriptive, comparative and correlative
statistics were applied in order to asses
BIVA (p<0.05).
RESULTS
Statistical differences were found
between the study sample and: 1) the
healthy reference population4 and 2) the
reference soccer population7 (Fig. 1 & 2).
No significant differences were found
between dominant vs. non-dominant
quadriceps and hamstring (Table 1;
Figure 3).
Figure 1. The 95% confidence ellipses of
the study sample, reference population
and reference soccer players.
I Jornada Catalana de Recerca en CAFiE
15 Juny 2016
Centre de Barcelona de l’INEFC
DISCUSSION & CONCLUSIONS
This study showed that soccer player analysed has a specific bioelectrical
characteristics when they compared both with general and soccer reference
populations. BIVA appear to be sensitive to detect this specific body
composition. The bioelectrical no differences between limbs suggest a
synergistic balance well compensated in the sample analysed. Further
investigations are necessary to continue analysing the validity of BIVA in
order to assess real-time hydration adaptions induced by exercise.
REFERENCES
1. Stachenfeld, N. (2013). Sports Science Exchange, 26(111), 1-4.
2. Burke, L. M., & Hawley, J. A. (1997). Sports medicine, 24(1), 38-54.
3. Howe, A. S., & Boden, B. P. (2007). The American Journal of Sports Medicine, 35(8), 1384-1395.
4. Piccoli, A., Rossi, B., Pillon, L., & Bucciante, G. (1994). Kidney international, 46(2), 534-539.
5. Lukaski, H. C., & Piccoli, A. (2012). InHandbook of anthropometry (pp. 287-305). Springer New York.
6. Norman, K., Stobäus, N., Pirlich, M., & Bosy-Westphal, A. (2012). Clinical nutrition, 31(6), 854-861.
7. Micheli, M. L., Pagani, L., Marella, M., Gulisano, M., Piccoli, A., Angelini, F., ... & Gatterer, H. (2014).
International Journal of Sports Physiology & Performance, 9(3).
Per més informació contacteu a:
airurtia@gencat.cat / ecc@gencat.cat
Dominant
Non-
dominant
Dif. % t-test p Dominant
Non-
dominant
Dif. % t-test p
R/l (Ω/m) 74.2 ± 5.7 73.9 ± 4.9 4.7 ± 2.7 0.151 0.88 89.0 ± 8.6 88.6 ± 6.6 4.6 ± 4.8 0.150 0.88
Xc/l (Ω/m) 23.2 ± 2.5 23.1 ± 2.7 7.7 ± 5.3 0.157 0,88 32.2 ± 3.0 31.3 ± 3.2 6.1 ± 3.7 1.048 0.30
Z/l (Ω/m) 77.7 ± 5.9 77.5 ± 5.2 4.8 ± 2.9 0.134 0,89 94.8 ± 8.1 94.0 ± 6.5 4.5 ± 3.9 0.304 0.77
PA (°) 17.4 ± 1.5 17.3 ± 1.6 4.4 ± 3.5 0.136 0.89 20.0 ± 2.5 19.5 ± 2.0 4.9 ± 4.9 0.818 0.42
Quadriceps Hamstring
Table 1. Muscle-localized BIVA characteristics of soccer players.
Values are expressed as mean and standard deviation. R: Resistance; Xc: Reactance, Z: Impedance; : ohm, l: length; m: meters; PA: phase angle.
Figure 2. Individual vectors of 22 soccer
players in the tolerance ellipses for the
reference soccer players (Micheli et al. 2014).
Figure 3. Comparative BIVA RXc mean graphs, between dominant and non-dominant
quadriceps and hamstring of soccer players.
0
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0 50 100 150 200 250 300 350 400
Xc/h(Ω/m)
R/h (Ω/m)
Micheli et al., 2014
Piccoli et al., 1994
Present study