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The effects of time pressure and numerical unbalance on football players’ interpersonal coordination and movement uncertainty

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  • Giancarlo Demétrio
  • Marcelo Rochael
  • Felipe A Moura
  • Bruno L S Bedo
  • Gibson Moreira Praça

Abstract

The study compared interpersonal coordination (vector-coding technique) and movement uncertainty (Shannon Entropy) on the longitudinal and lateral axes during offensive and defensive phases among football small-sided games with (TP) and without time pressure (noTP), in numerical equality (NE) and numerical superiority (NS). Forty under-17 football players participated in the study. Positional data were obtained through GPS devices. Data between the conditions were compared using a multivariate analysis of variance (MANOVA) for interpersonal coordination and the Kruskal–Wallis test for entropy measures. Results showed higher in-phase time on the x-axis during defensive phases in TP+NE vs. noTP+NE (p = 0.037) and on the y-axis during offensive phases in TP+NE (p = 0.031) and noTP+NS (p = 0.023) vs. noTP+NE. Additionally, higher y-axis entropy in the defensive phase was observed in noTP+NE vs. TP+NE (p = 0.047). A higher entropy in the y-axis during the defensive phase was found in noPT+NE (p = 0.038) compared to other conditions. In conclusion, the presence of time pressure rules increased the percentage of time in the in-phase pattern on the y-axis during the offensive phase and on the x-axis during the defensive phase. Protocols without time pressure generated higher entropy values in the defensive phase.

Suggested Citation

  • Giancarlo Demétrio & Marcelo Rochael & Felipe A Moura & Bruno L S Bedo & Gibson Moreira Praça, 2025. "The effects of time pressure and numerical unbalance on football players’ interpersonal coordination and movement uncertainty," International Journal of Performance Analysis in Sport, Taylor & Francis Journals, vol. 25(2), pages 271-289, March.
    • Handle: RePEc:taf:rpanxx:v:25:y:2025:i:2:p:271-289
    DOI: 10.1080/24748668.2024.2408975
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