Les wrote:
Martinez has been better known for her workout times the last 3 years than her race results. Since her 1:57 breakthrough year in 2013 she has gotten progressively slower at 800 each year. Since her bronze at the World Championships the same year she has not made the final at 800m in 2015 and finished last in her semi at 1500m in the Olympics this year. At the end of next season she will be 30. If another breakthrough doesn't happen she should seriously look at making a coaching change.
She has been planning to move up in distance at some point. Coach Vigil's system has been working well for her, no need to change coaches. In training she runs much longer and harder on the roads than other 800m specialists.