QUANTIFICATION OF THE LUMBAR FLEXION-RELAXATION PHENOMENON: COMPARING OUTCOMES OF LUMBAR ERECTOR SPINAE AND SUPERFICIAL LUMBAR MULTIFIDUS IN STANDING FULL TRUNK FLEXION AND SLUMPED SITTING POSTURES

摘要

Objective: The purpose of this study was to identify differences in flexion-relaxation outcomes in asymptomatic participants, with respect to both flexion-relaxation phenomenon (FRP) occurrence and spinal onset angles, as a function of posture and choice of muscle being examined.