The Dynamic Strength Index (DSI) is a valuable metric in sports science and strength training that provides insights into an athlete's capacity to generate force dynamically. It is particularly useful for tailoring strength training programs based on individual characteristics. The DSI is calculated by comparing the force produced in a dynamic movement, such as a counter-movement jump (CMJ), with the force generated in an isometric movement, like the isometric mid-thigh pull (IMTP). This ratio helps determine whether an athlete may benefit more from maximal strength training, ballistic strength training, or a combination of both.
AxIT automatically calculates the Dynamic Strength Index by utilizing Stomp-IT Force Plates to capture the ground reaction forces during both the counter-movement jump and the isometric mid-thigh pull. With the data collected from these movements, AxIT can efficiently compute the DSI, providing coaches, trainers, and athletes with a quantitative measure to guide strength training interventions.
Typically the DSI results can give insight on where the athlete may benefit from training.
| Score | DSI Score | Training Emphasis Recommendation |
| Low | <0.60 | Ballistic Strength Training |
| Moderate | 0.60-0.80 | Concurrent Training |
| High | >0.80 | Maximal Strength Training |