Comparison of two manual therapy approaches combined with exercise on pain, strength and electromyographic muscle activity in athletes with subacute mechanical low back pain

Abstract

Subacute mechanical low back pain (MLBP) has been found to increase significantly in athletes in the past decade. Manual therapy combined with exercises seems to be promising option; however, its potential effect in athletes is not fully known yet. The study aimed to compare between the effects of mulligan sustained natural apophyseal glides (SNAG) combined with exercise, muscle energy technique (MET) combined with exercise therapy and exercise therapy alone on pain, strength and muscle activity in athletes with subacute mechanical low back pain (MLBP). The athletes were screened for inclusion into the study using physical examination and Oswestry Disability Index (ODI). The study was a randomized 3 arm repeated measure design and a total of thirty athletes completed the study (n = 30). Athletes in group 1 received mulligan sustained natural apophyseal glides (SNAG) combined with exercise, group 2 received muscle energy technique (MET) combined with exercise while those in group 3 were submitted to exercise only. Athletes in all groups received treatment 3 times a week for 4 weeks. The outcome measures were visual analog scale (VAS) scores, back extensor strength and electromyographic (s EMG) muscle activity of longissimus lumborum (LL) and transversus abdominis (Tr A). The VAS score were decreased in all three groups (p < 0.05); however, group 2 and group 1 were more effective than group 3 (p < 0.05). The back extensor strength increased in two groups (p < 0.05): group 2 showed a significant increase compared to group 1. The s EMG muscle activity of LL and Tr A increased in two groups (p < 0.05): group 2 showed a significant increase compared to group 1. There were significant time, group and interaction effects for the three outcome measures (p < 0.05). The addition of MET combined with exercise therapy reduces pain level, improves back extensor strength and muscle activity of LL and TrA in athletes suffering with subacute MLBP more than mulligan SNAG combined with exercise therapy and exercise therapy alone.