Perhaps as a man I shouldn't be the first to respond to this ... or more being myself and knowing my own tolerances for a mess.

I don't know your routine but I might recommend doing just a little bit each day. Granted you don't get that satisfaction of sitting back after cleaning everything and enjoying a clean room or house for a day or two before it all starts going back but you do get a perpetually clean house.

It's certainly not easy when just gathering the supplies gets you winded. Do you keep all the cleaning supplies in one place? I might recommend keeping the supplies for each task in the spot your doing the chore in (when possible). So having bathroom cleaning supplies in each bathroom, etc.

For laundry, if you need to sit. One day you will be able to do it standing but sit if you need to for the whole thing, its better then getting light headed (its another goal you can add). Put things on your lap or sit at a table and lay them down as you fold to take some of the weight off.

Granted your talking to a person who can take a great deal of mess and seems to clean only when it reaches a point where I can't stand it anymore and then I have to clean everything (i also like to pile).

As for the desk job i'm in the same situation. Their aren't a lot of options. The best thing I have found is simply setting a reminder and forcing myself to get up every hour on the hour. Because I work at home this means I get up and go up and down the stairs and refill my water bottle, spend roughly 7 min moving around. It really helps with the step count. I use a small timer app on my phone that pings or buzzes each hour. I imagine at work you can find something to do each hour to increase your steps, refilling your water bottle (i love my metal water bottle), go up and down some stairs, take the longest rout.

At some point I am thinking of switching to a desk that allows me to change it from a sitting to standing desk whenever i want, that way i can spend part of the day sitting and part of the day standing.

YES! For me it is motivation now. I just can't get motivated to start. I can get a house clean.. I take a lot of breaks and it may take me all day, but I can do it. If I know company is coming, I will dread it for a month, take a day off from work and plan to clean house before because I let it build and build and build until it is so bad. I hate it. I usually shampoo the carpets, everything before people come over so they don't have a clue. Having a 3 yr old doesn't help. I have all these plans to go through her toys/clothes and donate them etc.. it never happens. I just can't keep up. I feel like everything is spinning out of control, the housework definitely is at the top of the list.