A new equation for predicting the hand activity level (HAL) used in the American Conference for Government Industrial Hygienists threshold limit value (TLV) was based on exertion frequency (F) and percentage duty cycle (D). The TLV includes a table for estimating HAL from F and Doriginating from data in Latko et al. (Latko WA, Armstrong TJ, Foulke JA, Herrin GD, Rabourn RA, Ulin SS, Development...
