Nope. Hate to say it, but strength training is not a great use of time to get good a cycling.

That hour you spent working on your 'core' would be far better (for cycling, specifically) spent doing hard intervals or hill climbs on the bike. Just look at all the top cyclists, and see how slender they are - twig arms, and surprisingly small quads.

Short-track sprinters , however, require big muscles. That's a different forum, though.

I hate that pro-cyclist look myself, and lift weights. But I'm under no illusion taht it's helping my riding.