It is widely believed that the next-generation wearable system will consist of self-powered skin electronics that are also capable of energy harvesting and health monitoring. This type of system will have a wide range of applications, including academic research on artificial intelligence as well as the clinical practise of healthcare medicine. Examples of self-powered skin electronics have been demonstrated using a variety of different types of devices, such as those associated with piezoelectricity, triboelectricity, biofuel cells, photovoltaics, and thermoelectricity, which convert various forms of energy into an electrical power source. The transformation of the biomechanical energy carried by limbs and joints into electrical energy has the potential to address a significant number of the existing constraints. Traditional vibratory energy harvesters call for one set of design and construction strategies, whereas wearable energy harvesters for wearable applications call for an entirely new set of strategies. A case study based on system integration and miniaturisation is also described in this chapter for applications in the field of human-machine interfacing. This chapter focuses on transduction materials, modelling strategies, experimental setups, and data analysis for the design of biomechanical energy harvesters. A rundown of the many techniques now in use to derive electricity for self-powered devices from the bodies of live organisms is shown here. The concept of using the human body as a source of energy spans a wide range of subtopics, including thermoelectric generators, power harvesting via kinetic energy, energy harvesting from the cardiovascular system, and blood pressure.

sophisticated electronics, wearable applications, cardiovascular system, kinetic energy.