... 4:18http://www.jfootankleres.com/content/4/1/18Page 3 of 8 Author details1Faculty of Kinesiology, University of Calgary, Calgary, AB, Canada.2Faculty ofNursing, University of Calgary, Calgary, AB, Canada.3Schulich School ofEngineering, ... of calculating plantar fasciastrain (PFS) and medial longitudinal arch (MLA) anglevalues. The MLA angle was calculated in a mannersimilar to Tome et al. [21]. The MLA angle was definedas the ... the NAV marker(Figure 4). Plantar fasci a strain is a unitless measure cal-culated by approximating the plantar fascia as spanningbetween the first metatarsal head (D1MT) and medialcalcaneus...