[robin416]

And bending over. I noticed that if I haven't been out cleaning up deadfall or using my chain saw my butt and backs of my thighs get sore.

 

[robin416]

Standing on the ladder I find I stretch the calf muscle because the heel of the foot is setting lower than the ball of the foot on the rung when I balance to clean windows. Usually doesn’t hit me until the next day.
I’ve pulled back of the thigh muscles when I knelt and bent over the bathtub to wash little dogs.

Trick I discovered with my windows that removes using the ladder. Extendable car was brush, some dish soap in a bucket of water and hose. I scrubbed the windows with the brush, then hosed them off. Surprisingly there were no water spots or streaks.

Of course that doesn't work so well for second story windows. And your neck might talk to you about it later.