A substantial amount of growth is being achieved by businesses through IoT-based services. The emergent of small electronic devices capable of computing, which are commonly known as wearables in IoT domain has proven to have huge impact in people's life. Theses wearables are capable of collecting vital information about a person's activities and behaviours regularly. This makes them suitable for many applications in health monitoring, fitness, sports, education and some industry related applications. To this end, in this paper, we aim to provide a general review on IoT-based wearables, the sensors adopted for several categorized wearables, the communication technologies adopted and the most widely adopted data processing techniques for wearables. Furthermore, we present the challenges faced for wide adoption of wearables and the future research directions.

翻译：企业通过基于物联网的服务实现了显著的增长。在物联网领域，能够进行计算的微型电子设备（通常称为可穿戴设备）的出现，已被证明对人们的生活产生了巨大影响。这些可穿戴设备能够定期收集个人活动和行为的关键信息，使其适用于健康监测、健身、运动、教育及部分工业相关应用中的众多场景。为此，本文旨在对基于物联网的可穿戴设备、各类可穿戴设备所采用的传感器、通信技术以及最广泛采用的数据处理技术进行综述。此外，我们还阐述了可穿戴设备广泛采用所面临的挑战及未来的研究方向。