There are many kavanahs that one can have with “Avinu Malkeinu Shlach Refuah Shleimah l’Cholei Amecha” that one can discuss.
Refuah Shleimah goes on Nefesh and Guf – one can speak of spiritual growth and this being the opportune time to continue to seek spiritual growth.
Additionally, one can doven that the healthy remain healthy. There is no need to wait until one is sick to doven for (continued) good health for yourself or others.