Time Activity Data (TAD) describe the frequency, duration, and timing of human activities. Given that activity dictates the rate of contact a person has with an environmental hazard, activity data can be used to derive rigorous estimates of exposure. TAD have been used to support exposure estimation in a variety of contexts, though there has been no systematic characterization of the use of this approach in exposure science and environmental epidemiology. Here, we propose a protocol in pursuit of characterizing the body of peer-reviewed literature using TAD in the estimation of exposure to chemical, biological, and physical hazards in the form of an evidence map. This protocol details the proposed search strategy and plan for data extraction including study population demographics, methods of TAD collection, and study participant activities. Reflexive journaling, codebook development, and descriptive statistics will be conducted to analyze the data collected as part of this evidence map
