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Table 3 Shoe outsole abrasion data

From: Pattern of outsole shoe heel wear in infantry recruits

Parameter Units N Mean ± STD Range
Max. abrasion direction, right Degrees to lateral 63 12 ± 16 −30 to 45
Max. abrasion direction, left Degrees to lateral 63 12 ± 23 −120 to 88
Lateral range of abrasion right Degrees to lateral 63 73 ± 23 0 to 120
Medial range of abrasion right Degrees to lateral 63 −59 ± 20 −90 to 60
Lateral range of abrasion left Degrees to lateral 63 74 ± 15 45 to 105
Medial range of abrasion left Degrees to lateral 63 −53 ± 21 −90 to 30
Mid range of abrasion right Degrees to lateral 63 7 ± 16 −30 to 90
Mid range of abrasion left Degrees to lateral 63 10 ± 11 −8 to 45
Volume of abrasion right cm3 60 5.1 ± 2.8 0.4 to 13.0
Volume of abrasion left cm3 60 4.7 ± 2.5 0.2 to 14.6
Percent of heel abraded right   60 2.7 ± 1.5 0 to 7
Percent of heel abraded left   60 2.5 ± 1.3 0 to 7