For the last few years a lot of research work has been carried out on the applications and other aspects of Wireless Body Area Networks (WBAN). Majority of this work are found on healthcare domain. In WBAN, sensor nodes are used either as wearable or as implant devices. These devices collect information from the human body and transmit them wirelessly to remote server which is viewed and analyzed by the concerned persons sitting in their chambers. But, the link between the WBAN and the remote server changes frequently due to the movement of human body. As such maintaining seamless connectivity in such environment is a challenge of current research work. In this paper, a novel Mobility Handling Routing Protocol (MHRP) for WBAN has been proposed. The proposed protocol is faster, reliable, takes care of human mobility through posture detection and ensures seamless connectivity. In support of better performance of the proposed algorithm, analytical comparison with related existing works is given.