^^^ if you are a motivated individual. People like me need a real whip cracker.
Using your core while riding and having an instructor who will work on it with you is a relative rarity.
BUT what I do in my everyday life is make a habit of doing small things well.
I put a whole stack of plates from the dishwasher to the shelf - not just one at a time.
I park further away, and walk my fastest to wherever I am going.
I jog all stairs - always - just a habit
mucking, brushing, etc. counts
I use my legs to get up from a chair, not my arms helping.
I do a sit up just to get up in the morning
AND
for a while there was a thread about the 30 day plank. It was great, but while I withered on the vine, will make a point of getting back to it. Check out Google.
There are abs under my little bit of pudge, but posture is a problem