Inclusion Criteria:  For clinical participants:  primary diagnosis of a schizophrenia-spectrum disorder (schizophrenia, schizophreniform, schizoaffective) or related psychotic disorder (delusional, brief psychotic, paraphrenia, bipolar with psychotic features, major-depressive with psychotic features) access to protected internet (i.e., home internet plugged or password protected wireless) adequate space to do yoga (e.g., at least 2 feet around each side of the yoga mat) able to speak and read English competent and able to offer voluntary informed consent to participate  For non-clinical participants (healthy controls):  not diagnosed with or received care for any mental illness access to protected internet (i.e., home internet plugged or password protected wireless) adequate space to do yoga (e.g., at least 2 feet around each side of the yoga mat) able to speak and read English competent and able to offer voluntary informed consent to participate  Exclusion Criteria:  For clinical participants:  not clinically stable; that is, major change in primary medication (e.g., switching or stopping antipsychotic) or hospitalisation within the past 4 weeks prior to first contact currently with a physical ailment that restricts light movement exercises for yoga or chair yoga  For non-clinical participants (healthy controls):  have a first-degree relative with psychosis (schizophrenia, schizo-affective, schizophreniform, paraphrenia, brief psychotic, delusional, or bipolar or major depressive disorder with psychotic features) had a substance or alcohol abuse/dependence in the past 6 months currently with a physical ailment that restricts light movement exercises for yoga or chair yoga