6/29/2023 0 Comments Impulse Power by J.C. HayThe football referee's activity profile is both physiologically and mechanically demanding, even at a sub-elite level. Curiously, no differences were found for impulse load between the field referee and the assistant referees. Significant differences were verified between field referee and assistant referees in the 1 st half and the 2 nd half and for total match-play: on average, the field referee had higher values for skin temperature (p = 0.016 r = -0.759), HR (p = 0.017 r = -0.757), %HR max (p = 0.017 r = -0.757), activity (p = 0.017 r = -0.757), and ACC peak (p = 0.017 r = -0.757). No physiological and mechanical differences were observed according to match half, considering the refereeing team members. The impulse load, expressed as N∙s, was also calculated. The following variables were considered for analysis: skin temperature, respiratory rate (RR), heart rate (HR), percentage of maximum heart rate (%HR max), posture, activity, and peak acceleration (ACC peak). One field referee (32.57 years) and two assistant referees (31.05 years) were monitored during 4 matches of the Portuguese Championship throughout the 2018-2019 season (senior age category, or adult), using the Zephyr TM BioHarness. This study aimed to examine the variation in physiological and mechanical load in a sub-elite refereeing team, considering the different parts of the match and their role (field referee vs.
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