Use containers that are easy to open. Use an electric can opener. Use small bottles of oil, etc. Rest your pot on the sink when draining it. Don't carry the full pot if it is too much - fill it a cup at a time.
Plastic is lighter than glass - use it for cups, mixing bowls, even utensils.
Scrub the tub by standing in it and scrubbing with your feet as well. Do touch-up with your hands as needed, but the bulk of the work is done by your strong leg muscles. They are lighter. Use a wire scrubber rather than a sponge to clean stuck-on food. Let dishes soak for a few minutes to make the job easier.