Lark tracks your activity by reading your phone's sensors. When you move around with your phone on you, your phone is picking up that movement and determining what kind of activity it is (walking, running, etc).
Lark then reads that info from your tracker and interprets it accordingly. Sometimes, it can be difficult for this technology to determine specific types of activity, but Lark tries its best!
If the type of activity that was recorded is incorrect, you can change this through your dashboard.
To do so, tap on the profile icon on the upper left side (or upper right side in Android) and then tap on the activity tab on the next page. Next, tap on the total number of activity minutes for that day. You can then tap on the specific activity log to edit it, including the type!