When I’m working from home, I sometimes do 1 mile swim (down the river), 1.5 mile run (to the river, then coming back up the river, barefoot in swimming shorts), 45 minutes door to door (or less if the river is high and the current is fast).
Best kind of exercise on a hot day, the swimming lowers your body temperature a little, I find I don’t sweat for the run, even when it is toasty warm.
Or another one is a 3 mile bike (10 mins on road bike) to a spot further down the river where there are some rapids and a big slow corner round the cricket pitch / sports fields, three or four times swimming down the rapids there, round the length of the meadow and run barefoot back to the start (30 mins or so) and then 3 miles bike back. 50 minutes to an hour total. Again, you get rid of the sweat in the river from the first ride, and the 10 minutes riding back is short enough that I don’t sweat much.