impact of medicine ball training on amplitude of electromyography activity in back pain patients during gait

Background: this research aimed to assess the effect of medicine ball exercise on the amplitude of electromyography activity in back pain patients while walking.methods: twenty back pain patients participated in this research. the participants were divided into two intervention (age: 26.4 ± 2.00 years) and control (age: 28.8 ± 2.0 years) groups. the intervention involved training with medicine ball. the roland morris questionnaire was employed to measure the pain index. in addition, the participants walked at self-selected gait speed along an 18-m level walkway. during walking, muscle activities of the following muscles were recorded: gastrocnemius lateral (gas-l), biceps femoris (bf), semimembranosus muscle (sm), gluteus medius (gm), erector spinae right (es-r), erector spinae left (es-l), internal abdominal oblique (ia-o) and external abdominal oblique (ea-o).results: significant main effects of time for disability index were observed (p < 001). also, significantly lower disability index was observed after exercise with medicine ball compared with pre-intervention. significant main effects of time for bf (p < 001, ƞ² = 0.532) and es-r (p < 001, ƞ² = 0.449) muscles activities during midstance phase were also found. the findings demonstrated lower bf activities after exercise with medicine ball compared to before it. finally, greater es-r activities post-exercise were observed with medicine ball compared with before it.conclusion: this study revealed that exercise with medicine ball improved disability index and muscle activities in individuals with back pain while walking.