![British Athletics Muscle Injury Classification: a new grading system](https://images.squarespace-cdn.com/content/v1/5bc744c7f4755a3ead4af487/1541186295214-TJ323JUDPU20PM0KM4FG/BA-SS-View-A.jpg)
![Normal presentation and diagnostic group 'a' injury](https://images.squarespace-cdn.com/content/v1/5bc744c7f4755a3ead4af487/1541192632756-80WF596666PVJO3I91KH/BA-SS-Normal-A.jpg)
![Diagnostic group 'b' and 'c' injuries](https://images.squarespace-cdn.com/content/v1/5bc744c7f4755a3ead4af487/1541192632650-X9P13Y190BWODGHR65MX/BA-SS-B-C.jpg)
![Transverse views](https://images.squarespace-cdn.com/content/v1/5bc744c7f4755a3ead4af487/1541192628108-H80R61KJLHL4FC7VNSAT/BA-SS-X-A-B.jpg)
![Hamstring Rehabilitation Guidelines](https://images.squarespace-cdn.com/content/v1/5bc744c7f4755a3ead4af487/1541192627832-E23JKMKXKHNOKNDVCI74/BA-SS-X-C-Full-Diagram.jpg)
![One Of The Illustrations In Use](https://images.squarespace-cdn.com/content/v1/5bc744c7f4755a3ead4af487/1553362397680-I5AVS0JUO222YZQ3G479/DrNoelPollack-Muscle-Injury-Classification-In-Use.jpg)
![British Athletics Muscle Injury Classification: a new grading system](https://images.squarespace-cdn.com/content/v1/5bc744c7f4755a3ead4af487/1541186295214-TJ323JUDPU20PM0KM4FG/BA-SS-View-A.jpg)
Series of illustrations depicting the anatomical site of muscle injury and hence the letter classification produced for publication of the system by Noel Pollock, Steven L J James, Justin C Lee, Robin Chakraverty in the British Journal of Sports Medicine.
![Normal presentation and diagnostic group 'a' injury](https://images.squarespace-cdn.com/content/v1/5bc744c7f4755a3ead4af487/1541192632756-80WF596666PVJO3I91KH/BA-SS-Normal-A.jpg)
For grade 1–4 injuries, the suffix ‘a’ denotes a myofascial injury in the peripheral aspect of the muscle. A normal presentation is shown (left) with a diagnostic group ‘a’ injury (right).
![Diagnostic group 'b' and 'c' injuries](https://images.squarespace-cdn.com/content/v1/5bc744c7f4755a3ead4af487/1541192632650-X9P13Y190BWODGHR65MX/BA-SS-B-C.jpg)
A diagnostic group ‘b’ injury (left) within the muscle belly, most commonly at the muscle tendon junction (MTJ) and diagnostic group ‘c’ injury (right) which extends into the tendon.
![Hamstring Rehabilitation Guidelines](https://images.squarespace-cdn.com/content/v1/5bc744c7f4755a3ead4af487/1541192627832-E23JKMKXKHNOKNDVCI74/BA-SS-X-C-Full-Diagram.jpg)
Final transverse view, showing a tendinous ‘c’ injury (left). The final table (right) showing the classification in practice. Guidance is given for the rehabilitation of hamstring injuries for each of the three injury classifications.
![One Of The Illustrations In Use](https://images.squarespace-cdn.com/content/v1/5bc744c7f4755a3ead4af487/1553362397680-I5AVS0JUO222YZQ3G479/DrNoelPollack-Muscle-Injury-Classification-In-Use.jpg)
Dr Noel Pollock presenting the British Athletics Muscle Injury Classification at the world acclaimed Isokinetic Football Medicine Conference at the Nou Camp Stadium, Barcelona, in 2017.