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Electromyographic Analysis of Upper and Lower Limb Muscles during Gardening Tasks
박신애,이아영,김재정,이관석,소재무,손기철 한국원예학회 2014 원예과학기술지 Vol.32 No.5
Movements of the upper and lower limb muscles during five common gardening tasks were analyzed by usingelectromyography (EMG). Twenty adults aged in their twenties (mean age, 24.8 ± 2.4 years) were recruited. On two separateoccasions, subjects visited a garden plot to perform digging, raking, troweling, weeding, and hoeing; all tasks were performedthree times with 20 s intervals for each trial. To measure muscle activation during the five gardening tasks, surface EMG wasused. Bipolar surface EMG electrodes were attached to eight upper limb muscles (bilateral anterior deltoid, biceps brachialis,brachioradialis, and flexor carpi ulnaris) or eight lower limb muscles (bilateral vastus lateralis, vastus medialis, biceps femoris,and gastrocnemius) on both sides of the body, for a total of 16 muscles. During the five tasks, photographs were taken ofmovement phases using a digital video camera. The right flexor carpi ulnaris and brachioradialis showed higher activation thanthe other upper and lower limb muscles measured during the tasks. All 16 upper and lower limb muscles were actively usedonly during digging. According to movement analysis of each activity, digging was classified into four movement phases, whereasraking, troweling, weeding, and hoeing each were divided into three movement phases. In each activity, there were high-impactphases in terms of muscle activation; the flexor carpi ulnaris and brachioradialis were identified as major muscles in each impactphase. This analysis may be used to generate biomechanical profiles of gardening tasks for practitioners when designing efficientgardening interventions for physical health or rehabilitation.
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