I haven't read the full thread but will say that exercise is important - especially as you age.
You might not love it - but find something that you don't mind doing and stick to that. You don't have to be a super athlete, but move your body most days per week.
Once you get past 30 it's harder to build new muscle, and with the gradual loss of natural oestrogen strength of existing muscle fibres decline, as does bone mass, tendon strengh, ligament flexiblity. All the stuff really.
So it's a good idea to get moving as soon as you can. Even if you don't really want to.
I work in a gym and see so many older people who come and work out as they don't be to be frail and falling over. Strength training and regular gentle cardio will be enough to keep moving into older age. Those who are not active - no exercise/gardening/walking etc usually decline at an earlier age.
So yes - it is important.
I don't particularly love exercise - I am inherently lazy but am just setting off now.