What is A:P?
The A:P is a simple metric that measures activity of the anterior chain to the posterior chain muscles. It is common to compare anterior posterior by strength, force, or sEMG in facilities with the right equipment, and it can be completed manually. The A:P is presented as a ratio:
A:P = Anterior/Posterior
An A:P of 1 means that the anterior and posterior are equal contributors. However, based on hundreds of training sessions, we have determined that normal anterior to posterior should generally be less than 1 where the Anterior should be contributing less than the posterior for all types of movements including vertical jumps, pitching, shooting, etc, for maximum power.
How to track A:P
The load incurred by specific muscles in the body can be tricky to measure. Coaches and athletes with access to clinical sEMG or strength measurement tools can measure A:P contribution however, most organizations want to better understand what their athletes muscles are doing in real settings. There are very few technologies in the consumer market that can measure this. However, recent advances in sEMG technology by Athos can provide specific information on the load incurred specifically by the anterior and posterior chains. To learn more about how you can track A:P, click here.