An ergonomic assessment of the long handle blueberry harvesting rake.
BACKGROUND
Previous work shows the superiority of the long-handled blueberry harvesting rake (LHR) for worker preference and productivity compared to the short-handle rake (SHR).


METHODS
Post-shift interviews on occurrence, location, and severity of pain, and video-based observation of body postures enabled ergonomic assessment of Maine workers harvesting blueberries. Workers randomly crossed between LHR and SHR on consecutive work days. Wilcoxon tests compared proportions of specific body postures between LHR and SHR.


RESULTS
Subjects used SHR for shorter work periods than LHR. Thirty workers provided interviews for both one LHR and one SHR shift. Assessment of these matched pairs suggested a trend toward less frequent overall pain (P = 0.07) and back pain (P = 0.11) with the LHR versus the SHR. Video tape analysis included 17 sets of observations (8 SHR and 9 LHR) on 12 individuals. Posture assessment showed more severe forward bend and squatting with the SHR and more moderate/neutral postures with the LHR.


CONCLUSIONS
Harvesting with the traditional SHR is likely to be associated with increased frequency of pain in general, and mid-low back pain in particular, when compared to the newer LHR. This may well relate to the work postures associated with each rake. Periodicals, Inc.
The Northeast Center for Agricultural Health, Bassett Healthcare Network, Cooperstown, NY, USA.
Elizabeth
E
May
Melissa
M
Scribani
Sherry
S
Wyckoff
Robert
R
Bauer
John
J
May
Lynae
L
Wyckoff
Paul
P
Jenkins
D000062:Accidents, Occupational / Q000706:statistics & numerical data*; D000328:Adult; D000383:Agriculture / Q000295:instrumentation*; D001416:Back Pain / Q000453:epidemiology* / Q000209:etiology; D029798:Blueberry Plants; D004526:Efficiency; D006804:Ergonomics; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D008281:Maine / Q000453:epidemiology; D008297:Male; D009140:Musculoskeletal Diseases / Q000453:epidemiology* / Q000209:etiology; D010147:Pain Measurement; D057566:Self Report; D012720:Severity of Illness Index; D013223:Statistics as Topic; D011795:Surveys and Questionnaires; D013997:Time Factors; D014171:Transients and Migrants; D014481:United States / Q000453:epidemiology; D014743:Videotape Recording