Journal of athletic training · 2009
Jogging kinematics after lumbar paraspinal muscle fatigue.
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Hart Joseph M, Kerrigan D Casey, Fritz Julie M, Ingersoll Christopher D
Аннотация
CONTEXT: Isolated lumbar paraspinal muscle fatigue causes lower extremity and postural control deficits.
OBJECTIVE: To describe the change in body position during gait after fatiguing lumbar extension exercises in persons with recurrent episodes of low back pain compared with healthy controls.
DESIGN: Case-control study.
SETTING: Motion analysis laboratory.
PATIENTS OR OTHER PARTICIPANTS: Twenty-five recreationally active participants with a history of recurrent episodes of low back pain, matched by sex, height, and mass with 25 healthy controls.
INTERVENTION(S): We measured 3-dimensional lower extremity and trunk kinematics before and after fatiguing isometric lumbar paraspinal exercise.
MAIN OUTCOME MEASURE(S): Measurements were taken while participants jogged on a custom-built treadmill surrounded by a 10-camera motion analysis system.
RESULTS: Group-by-time interactions were observed for lumbar lordosis and trunk angles (P < .05). A reduced lumbar spine extension angle was noted, reflecting a loss of lordosis and an increase in trunk flexion angle, indicating increased forward trunk lean, in healthy controls after fatiguing lumbar extension exercise. In contrast, persons with a history of recurrent low back pain exhibited a slight increase in spine extension, indicating a slightly more lordotic position of the lumbar spine, and a decrease in trunk flexion angles after fatiguing exercise. Regardless of group, participants experienced, on average, greater peak hip extension after lumbar paraspinal fatigue.
CONCLUSIONS: Small differences in response may represent a necessary adaptation used by persons with recurrent low back pain to preserve gait function by stabilizing the spine and preventing inappropriate trunk and lumbar spine positioning.
OBJECTIVE: To describe the change in body position during gait after fatiguing lumbar extension exercises in persons with recurrent episodes of low back pain compared with healthy controls.
DESIGN: Case-control study.
SETTING: Motion analysis laboratory.
PATIENTS OR OTHER PARTICIPANTS: Twenty-five recreationally active participants with a history of recurrent episodes of low back pain, matched by sex, height, and mass with 25 healthy controls.
INTERVENTION(S): We measured 3-dimensional lower extremity and trunk kinematics before and after fatiguing isometric lumbar paraspinal exercise.
MAIN OUTCOME MEASURE(S): Measurements were taken while participants jogged on a custom-built treadmill surrounded by a 10-camera motion analysis system.
RESULTS: Group-by-time interactions were observed for lumbar lordosis and trunk angles (P < .05). A reduced lumbar spine extension angle was noted, reflecting a loss of lordosis and an increase in trunk flexion angle, indicating increased forward trunk lean, in healthy controls after fatiguing lumbar extension exercise. In contrast, persons with a history of recurrent low back pain exhibited a slight increase in spine extension, indicating a slightly more lordotic position of the lumbar spine, and a decrease in trunk flexion angles after fatiguing exercise. Regardless of group, participants experienced, on average, greater peak hip extension after lumbar paraspinal fatigue.
CONCLUSIONS: Small differences in response may represent a necessary adaptation used by persons with recurrent low back pain to preserve gait function by stabilizing the spine and preventing inappropriate trunk and lumbar spine positioning.