Human being performs various body movements or body part movements required to accomplish several daily cores at indoor or at outdoor at different times of the day and night as well. These are termed in general as human activities such as sit, stand, walk, run, jogging, stair up, and stairs down. Human activity recognitionHuman Activity Recognition (HAR) is a multidisciplinary research domain that detects and classifies the human activities with appropriate labels. Now all body part or whole body movement as well as displacement is not called human activities. Human activity is a combination of gesturesGesture, behavior, interaction, etc. Except interaction, in all other forms of activities, single human being is involved. In interaction, it is two-party or multiparties involved.