their materials, such as compliance, flexibility, and overall safety for human interaction. Commonly, the rigidity and stiffness of conventional materials in robotics limit their applications into certain healthcare or biomedical disciplines. [1][2][3] Recent developments in material science have made possible the fabrication of biomimetic soft robots that are able to perform some simple types of actuation [4] including crawling, [5] gripping, [6] or change its shape, [7] but they are still far from the degree of complexity and movement sophistication in living organisms.One of the most investigated applications of soft robotics is the development of artificial muscles that can mimic the performance of native muscle tissue in mammals. Muscle tissue is inherently complex, being simultaneously strong and fast while enabling a wide variety of movements through an efficient self-organization of its fiber bundles. However, current materials still lack the ability to fully replicate these properties. [8] Even more, other features from biological tissues, such as self-healing, energy efficiency, power-to-weight ratio, adaptability or bio-sensing, to name only a few, are strongly desired but difficult to achieve with artificial soft materials. [9] Bio-hybrid robotics is born at this point as a synergistic strategy to integrate the best characteristics of biological entities and artificial materials into more efficient and complex systems, hoping to overcome the difficulties that current soft robots face. Several strategies to unify the development of bio-hybrid devices have Biohybrid robots, or bio-bots, integrate living and synthetic materials following a synergistic strategy to acquire some of the unique properties of biological organisms, like adaptability or bio-sensing, which are difficult to obtain exclusively using artificial materials. Skeletal muscle is one of the preferred candidates to power bio-bots, enabling a wide variety of movements from walking to swimming. Conductive nanocomposites, like gold nanoparticles or graphene, can provide benefits to muscle cells by improving the scaffolds' mechanical and conductive properties. Here, boron nitride nanotubes (BNNTs), with piezoelectric properties, are integrated in musclebased bio-bots and an improvement in their force output and motion speed is demonstrated. A full characterization of the BNNTs is provided, and their piezoelectric behavior with piezometer and dynamometer measurements is confirmed. It is hypothesized that the improved performance is a result of an electric field generated by the nanocomposites due to stresses produced by the cells during differentiation. This hypothesis is backed with finite element simulations supporting that this stress can generate a non-zero electric field within the matrix. With this work, it is shown that the integration of nanocomposite into muscle-based bio-bots can improve their performance, paving the way toward stronger and faster bio-hybrid robots.