Services › Assisted Functional Stretching Image 1 of 1 Assisted Functional Stretching $20.00 Assisted Stretch Fitness (ASF)Assisted Stretch Fitness (ASF)is a form of P.I.T. Manuver treatment stretch where you will be assisted by a trained professional to guide the body through stretches, allowing for a deeper and more effective stretch than can be achieved alone. This technique is beneficial for improving flexibility, reducing muscle tension, and enhancing overall mobility. Add to Cart Added! Assisted Stretch Fitness (ASF)Assisted Stretch Fitness (ASF)is a form of P.I.T. Manuver treatment stretch where you will be assisted by a trained professional to guide the body through stretches, allowing for a deeper and more effective stretch than can be achieved alone. This technique is beneficial for improving flexibility, reducing muscle tension, and enhancing overall mobility.