This paper addresses the challenges of packet loss and end-to-end delay in Wireless Body Area Networks (WBANs), which are significant for real-time health monitoring applications. The proposed Cooperative Routing Protocol (CRP) enhances packet delivery and reduces delays by improving the transmission reliability through multi-hop communication. Results indicate that CRP achieves a delivery ratio improvement from 0.8118 to 0.8176, thereby increasing network performance and reducing energy consumption.