Context:
Research and clinical recordings of lumbar flexion demand practicable and precise methodology for quantifying variations.
Objective:
To describe and evaluate the parallel reliability of 2 methods of measuring lumbar fexion—perpendicular stick markers (SM) and the distanciometer (DM)—using an electrogoniometer (EGM) as reference.
Design:
Parallel measurement for reliability.
Setting:
Laboratory.
Participants:
25 healthy men.
Intervention:
Simultaneous measure of lumbar flexion at preestablished positions (0°, 15°, 30°, and 45°).
Outcome Measures:
Data from SM and DM, recorded simultaneously.
Results:
High parallel reliability was found when comparing the EGM data with the SM (r = .997; measurement error: 0.6° ± 0.7°; no differences: t-test P = .260) and with the DM (r = .962; measurement error: 2.8° ± 1.9°; no differences: t-test P = .973).
Conclusions:
Considering the reliability, practicability, and low cost of the described methods, they can be regarded as applicable and useful.