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    • Time-motion analysis and heart rate recordings of South African Rugby Union referees 

      Kraak, Wilbur Julio; Malan, Dawid Daniel Jacobus; Van den Berg, Pieter Hendrik; Kraak, Wilbur Julio; Malan, Dawid Daniel Jacobus; Van den Berg, Pieter Hendrik (LAM Publications, 2011)
      The objective of this study was to determine the movement patterns, heart rates and work-to-rest ratios of South African Rugby Union referees during the two halves of match-refereeing. The referees were monitored by means ...