An expanding variety of interactive technologies has been shown effective to support movement-based experiences in domains such as physical rehabilitation and training. While they can range in complexity, here we argue for a minimal technological approach that can be both effective while also considering pressing sustainability needs. We present the Movement and Training Technologies (MoTTs), minimalist wearables providing multisensory movement feedback while leveraging the hardware of already-existing smartwatches. They resulted from embodied co-design activities in a Research through Design project focused on a specific rehabilitation context in neurorehabilitation after peripheral nerve transfer surgery. However, their minimalism, open-endedness and generalisability made them apt for reappropriation to support other rehabilitation and training goals. We demonstrate the range of physical activities the MoTTs can support and prompt collective reflection on sustainable design drives and how they can coexist with commonplace expectations of technological development.