The dosage of occupational therapy and physiotherapy positively correlates with rehabilitation patient and health service outcomes. Nevertheless, increasing the dosage during inpatient rehabilitation without additional resources can be challenging. This study aimed to determine feasibility of increasing the dosage of inpatient occupational therapy and physiotherapy rehabilitation with independent tasks and exercises outside of supervised sessions, the 'My Therapy' programme. A two-group, quasi-experimental, pre-post-design examined feasibility of delivering My Therapy in addition to usual care, compared to usual care alone, for hospitalised musculoskeletal and frail older rehabilitation patients. My Therapy was prescribed by the occupational therapist and physiotherapist. A booklet was provided with an individually tailored set of tasks and exercises that were a sub-set of routine therapy, to be practised safely, effectively and independently outside of supervised sessions. The primary outcome was feasibility of My Therapy implementation to achieve at least 70% adherence. Secondary outcomes were self-reported daily My Therapy participation (minutes), total daily rehabilitation participation (minutes), adverse events, length of stay, 10-metre walk speed, FIM scores and discharge destination. Participation in My Therapy was achieved by 72% (83/116) of the My Therapy group, who averaged 14 min (SD 14) of daily practice outside of supervised sessions. Total daily rehabilitation participation was 177 min (SD 47) for My Therapy participants (n = 116) and 148 min (SD 88) for usual care participants (n = 89); mean difference 30 min (p = .00). A minimal clinically important difference in FIM was achieved for a significantly higher portion of the My Therapy group (22%, n = 26) compared to usual care (10%, n = 9; p = .02). There were no adverse events, safety concerns or group differences for other secondary outcomes. My Therapy was a feasible and safe way to increase the dosage of inpatient occupational therapy and physiotherapy rehabilitation via independent practice. Clinical Trial Registry: ACTRN12616000691448. © 2019 Occupational Therapy Australia.