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Heart rate distribution presented as percentage of total playing time in heart rate zones of <70%, 70-80%, 80-90%, 90-95%, 95-100% as well as 90-100% of individual peak heart rate (%HRpeak) in small-sided recreational football games with 80 and 60 m2 area per player. * denotes significant difference (P<0.05) between game formats. Data are presented as mean±SD.
