According to literature a stress fracture of the 2nd metatarsal is the most common one in athletes (Chuckpaiwong et al., 2009).
Metatarsals are the long bones of the foot forming the base of the toes.
Stress fractures can occur due to poor foot biomechanics and excessive load. When this occurs the bone becomes weak.
Biomechanical anomalies and training regime should be reviewed as well as footwear. Female athletes can be more prone to stress fractures due to changes in diet and change in menstrual cycle.
Chuckpaiwong B. et al., 2009, Second metatarsal stress fracture in sport: comparative risk factors between proximal and non-proximal locations, British Journal of Sports Medicine, 41(8); pp: 510-514