*2.3. Search Strategy*

The authors of this review searched for studies according to the inclusion criteria in the following electronic databases: IEEE Xplore and Science Direct. Every study was independently evaluated by eight reviewers (JF, IMP, GM, NMG, EZ, PL, FFR, and SS), and all parties evaluated its suitability. The studies were examined to identify the characteristics of AdaBoost and its relevance for the implementation in recognition of daily activities and environments using mobile devices.

#### *2.4. Extraction of Study Characteristics*

The following data were extracted from the studies and tabulated (see Tables 1 and 2): Year of publishing, the population was taken into account, purpose, equipment used, and outcomes of each publication. All cited studies in Tables 1 and 2 informed that the experiments were performed in laboratory settings. The verification of the availability of the raw data was performed.





located on the wrist, knee, ankle,

Battery life considerations

The authors should test the robustness of the system and improve privacy, security, and user friendliness; Not evaluated on different test subjects

and mid-waist


**Table 2.** *Cont*.


