Polly is a Sport and Exercise Medicine Consultant. She originally trained in Emergency Medicine, before specialising in Sport and Exercise Medicine in 2008 and gaining her diploma of Sport and Exercise Medicine from the Royal College of Surgeons in Edinburgh in 2010. Her sports medicine experience includes time with Chelsea Football Club and later as team doctor for Arsenal Ladies'. She is currently the team doctor for Northampton Saints Rugby and Great Britain Handball. Polly has worked as a Consultant at Headley Court Defence Medical Rehabilitation Centre, where she supervised the treatment and rehabilitation of injured servicemen and women.

Polly is involved in promoting the importance of physical activity and is co-author of the NHS document 'A fresh approach'. She has a particular interest in tendon injuries and bone health. She is also skilled in diagnostic ultrasound and ultrasound guided procedures.