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Hi Roopesh. I believe you don't need the firs two seconds of your animation since it is a repetitive leg movement. And make sure you move the hips, upper body, head, and hands as well when you are moving the leg up and down. And you might want to change the camera angle too, or if you would like to keep the camera then don't make the character go towards the camera. And watch the knees while/and after he's standing up.