Typing Keystroke Duration Changed After Submaximal Isometric Finger Exercises

Details

• Personal Author:
  Dennerlein, Jack T. ; Eisen EA ; Joe-Chang CH ; Johnson PW ; Katz JN
• Description:
  A repeated-measures laboratory experiment tested whether keystroke duration during touch-typing changes after a finger performs submaximal isometric flexion exercises. Fourteen right-handed touch-typists used right ring finger to perform three 15-min exercise conditions, two isometric exercises and a no-force condition, each on a separate day. Before and after each exercise condition, typing keystroke duration and isometric force elicited by electrical stimulation were measured for right ring finger. Keystroke duration of right ring finger decreased by 5% (6 ms, P < 0.05) immediately after the exercises but not after the no-force condition. Peak isometric finger force elicited by electrical stimulation decreased by 17-26% (P < 0.05) for the flexor digitorum superficialis and decreased by 4-8% for the extensor digitorum communis after the isometric exercises. After the finger was exposed to isometric exercises, changes in typing keystroke duration coincided with changes in the physiological state of the finger flexor and extensor muscles. [Description provided by NIOSH]
• Subjects:
  Biomechanical Phenomena Computers Ergonomics Fatigue Musculoskeletal Diseases Musculoskeletal System Occupational Exposure Occupational Health Safety
• Keywords:
  Author Keywords: Computer Use Biomechanics Computer-equipment Exposure Assessment Humans Muscle Physiology Muscles Musculoskeletal-system Musculoskeletal Disorders Occupational-exposure Physiological-factors Posture Statistical-analysis

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• ISSN:
  1439-6319
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Massachusetts ; OSHA Region 1
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  93-101
• Volume:
  105
• Issue:
  1
• NIOSHTIC Number:
  nn:20034992
• Citation:
  Eur J Appl Physiol 2009 Jan; 105(1):93-101
• Contact Point Address:
  Department of Environmental Health, Harvard School of Public Health, 665 Huntington Avenue, Boston, MA, 02115
• Email:
  chjchang@gmail.com
• Federal Fiscal Year:
  2009
• Performing Organization:
  Harvard University, Boston, Massachusetts
• Peer Reviewed:
  True
• Start Date:
  19990930
• Source Full Name:
  European Journal of Applied Physiology
• End Date:
  20090831
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:0f4ed7fccfd2ecb7fc7e1d47183179db012daf6d3695b57574a76316af13bc32e2e9a57af2329e83109fedbd4e6f04f62995d7048fc888558e34d5261551ebcb
• Download URL:
  https://stacks.cdc.gov/view/cdc/186998/cdc_186998_DS1.pdf
• File Type:
  [PDF - 486.25 KB ]