Thanks @KingscoteStaff. This thread is the most hopeful i've seen in months.
While we have some nice weekend walks etc, sometimes I find even cycling round the block stressful. One of my DCs is stupidly reckless, the other annoyingly cautious. I'm like an army general who doesn't understand kids and lost command, so generally physical activities don't pan out well.
Also they whinge every 15 minutes about everything (it's too cold, it's too hot, draw me a uni fucking corn, why does she get to sit that side of table/car, you gave him more food than me, i'll do my homework/go for a walk if you [insert reverse threat or bribe]). They are always negotiating, always fighting, always asking for food and always finding mischief if your eyes are not on them 24/7.
I found the baby to preschool stage many times easier because they are under your "control" and easier to keep alive. You pop them on your bike child trailer/seat, they eat less, take a stroller for a walk, leave them in a creche to ski. Zero sibling rivalry as parallel existence at those ages. Sibling rivalry is a huge issue for me due to their close age gap (13 months) and opposing personalities.