FRC PAILs and RAILs Methodology

Question 1

What does PAILs stand for in the FRC methodology?

Accepted Answer

Progressive Angular Isometric Loading

Answer

Passive Angular Isometric Lengthening

Answer

Progressive Active Isometric Loading

Answer

Passive Active Integrated Loading

Question 2

In the PAILs/RAILs protocol, which contraction direction defines PAILs?

Accepted Answer

Contracting into the stretch to push deeper into the range

Answer

Contracting away from the end-range position

Answer

Contracting perpendicular to the plane of movement

Answer

Contracting through full range of motion dynamically

Question 3

What does RAILs stand for in the FRC system?

Accepted Answer

Regressive Angular Isometric Loading

Answer

Rapid Angular Isometric Loading

Answer

Regressive Articular Isometric Lengthening

Answer

Reactive Angular Isometric Loading

Question 4

What is the recommended minimum passive stretch duration before initiating PAILs contractions?

Accepted Answer

2 minutes

Answer

30 seconds

Answer

1 minute

Answer

5 minutes

Question 5

During a PAILs contraction, the practitioner typically begins at what intensity and progresses toward what maximum?

Accepted Answer

20% MVC progressing to 100% MVC

Answer

10% MVC progressing to 50% MVC

Answer

50% MVC held constant throughout

Answer

100% MVC applied immediately

Question 6

What is the primary neurological goal of RAILs contractions?

Accepted Answer

To train the nervous system to actively pull the joint into newly acquired ranges

Answer

To increase passive flexibility through proprioceptive neuromuscular facilitation

Answer

To reduce inflammation in the joint capsule through isometric loading

Answer

To develop maximal strength at mid-range positions

Question 7

Which sequence is correct for the standard PAILs/RAILs protocol?

Accepted Answer

Passive stretch → PAILs → RAILs

Answer

RAILs → Passive stretch → PAILs

Answer

Passive stretch → RAILs → PAILs

Answer

PAILs → RAILs → Passive stretch