European Journal of Investigation in Health, Psychology and Education (Aug 2021)

Association between Change in Regional Phase Angle and Jump Performance: A Pilot Study in Serie A Soccer Players

  • Tindaro Bongiovanni,
  • Athos Trecroci,
  • Alessio Rossi,
  • Fedon Marcello Iaia,
  • Giulio Pasta,
  • Francesco Campa

DOI
https://doi.org/10.3390/ejihpe11030063
Journal volume & issue
Vol. 11, no. 3
pp. 860 – 865

Abstract

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Purpose: This observational longitudinal investigation aimed to investigate whether change in bioelectrical regional phase angle (PhA) is a predictor of change in vertical jump performance in elite soccer players. Methods: Fifteen soccer players (age: 28.7 ± 5.0 years, body weight: 82.4 ± 6.8 kg, height: 186.0 ± 0.1 cm, body mass index: 23.8 ± 1.2 kg/m2) competing in the first Italian division (Serie A) were included in this study and tested before the pre-season period and after the first half of the championship. Whole body and lower hemisoma PhA were obtained with a phase-sensitive 50 kHz bioelectrical impedance analyzer and legs lean soft tissue was estimated using specific bioimpedance-based equation developed for athletes. Vertical jump performance was assessed using the countermovement jump (CMJ). Results: The major findings of the study are that changes in lower hemisoma PhA are more strongly related with changes in jump performance (r2 = 0.617, p = 0.001) than changes in whole-body PhA (r2 = 0.270, p = 0.047), even after adjusting for legs lean soft tissue and for body mass index (β = 5.17, p = 0.004). Conclusions: These data suggest that changes in lower hemisoma PhA might be used as a tool for evaluating performance related parameters in sports where specific body segments are involved, in preference to the whole-body measured value.

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