Correction:Quantifying Collision Frequency and Intensity in Rugby Union and Rugby Sevens: A Systematic Review (Sports Medicine - Open, (2022), 8, 1, (12), 10.1186/s40798-021-00398-4)

The following errors are noted and corrected: 1. In Abstract, Results, sentence 5: ‘156.1 (121.2–191.0)’ should have been ‘171.2 (140.5–201.8)’. 2. In section Microtechnology, Rugby Union Training, final sentence: ‘contacts’ should have been ‘tackles’ and vice versa. 3. In section Video-Based Analysis, Rugby Union Match Play, sentence 3: ‘156.1 (121.2–191.0)’ should have been ‘171.2 (140.5–201.8)’. 4. In Table 4: The following additional data have been added to the Vaz et al. (2010) (89) row: Column 2: S12 competition: 95 matches; Column 5: 112.7 ± 33.1; Column 6: 99.4 ± 3.0. The original version of Table 4 has been replaced with the version shown below: 5. Fig. 5c: The two entries for Vaz et al. 2010 (89) have now been removed from this figure. The original version of Fig. 5 has been replaced with the version shown below.