Fig. 2From: Feasibility and usability of GPS data in exploring associations between training load and running-related knee injuries in recreational runnersWeekly Acute:Chronic Workload ratios (ACWRs) of participants with a running-related knee injury (RRKI) and without a running-related injury (RRI). ACWRs are calculated by weekly training distance. A For participants with an RRKI, weekly ACWR is calculated for the eight weeks before onset of the RRKI. For participants without an RRI, weekly ACWR is calculated for the eight weeks before start of the running event. For both groups the ACWRs are also calculated based on registered distance of running event: B short-distance (5–10.55 km) and C long-distance (21.1–42.2 km). ACWRs within the range of 0.8 to 1.3 (“green zone”) were regarded as normal [12]Back to article page