Abstract: Back pain is one of the most common and widespread problems in today's obsessive-compulsive lifestyle. Reasons for having back pain problems can be muscle spasms, heavy lifting, cracked discs, sciatica, abnormal spinal curvature, poor sleep habits etc. sleeping or sitting incorrectly is the common cause of pain in the lower muscle. The ultimate solution for this is to change routine habits. For more help use our "Smart Waist Belt+ Mobile Application" which is a clever IoT and Android tool by which the user will not get into wrong position. Adding a module that measures pulse rate and oxygen level makes it more useable in daily life. App clearly warns the user whenever they enter the wrong position or the pulse rate or oxygen level increases or decreases. The android mobile app shows the dimensions, temperature, heart rate and oxygen level which doctors and users both can track and perform according to their needs.

Keywords: Internet of Things, Wearable Device, Activity Recognition, Health Behaviour Change, Smart Health Care, Digital Health Care, Posture Alert, Accelerometer, Heartbeat, Oxygen level.

| DOI: 10.17148/IARJSET.2021.8564