The New ACGIH Upper Limb Localized Fatigue TLV



In 2016 the ACGIH published a new TLV®: Upper Limb Localized Fatigue.  The purpose of the TLV is to provide employers and health and safety professionals guidance for preventing upper extremity musculoskeletal fatigue among workers who perform cyclical work for 2 or more hours per day.  The TLV® is based combinations of hand force and exertion time that have been found to be acceptable for repetitive work.  Exposure limits to job risk factors are presented that will allow most healthy workers to maintain their work capacity and normal performance for the duration of the workday without experiencing excessive persistent fatigue. Excessive fatigue many be experienced as pain, decreased strength, localized discomfort, tremor or other symptoms or signs of reduced motor control.  This webinar will present an introduction to localized fatigue, the scientific basis for the TLV, methods of determining hand force levels and patterns, and example from the workplace of the application of the TLV®.  At the conclusion of the presentation there will be time for questions and comments.

Course Objectives

1.   Understand aims and basis of the TLV®

2.   Understand the scientific data underpinning the TLV®

3.   Understand methods for measuring hand force patterns.

4.   Be able to apply and interpret the TLV® to measured workloads.

5.   Be able to make recommendations to employers based on the TLV®.

Presenter: David Rempel, member ACGIH Physical Agents Committee

Bio: David Rempel, MD, MPH, CPE

Professor of Bioengineering at University of California at Berkeley, and Professor Emeritus of Medicine at the UC San Francisco in the Division of Occupational and Environmental Medicine.  He is Board Certified in Internal Medicine, Occupational Medicine, and Ergonomics.  His research focuses on hand biomechanics and the design of tools and tasks in order to improve productivity and the quality of work while preventing hand and arm fatigue and injury.  Dr. Rempel is a member of the ACGIH Physical Agents Committee and a member of the National Academy of Sciences, Board on Human Systems Integration.  Publications and descriptions of research projects are at