Joined: Aug 2009
Posts: 6,766
Likes: 5,405
From: Minneapolis
Bikes: 2022 Salsa Beargrease Carbon Deore 11, 2020 Salsa Warbird GRX 600, 2020 Canyon Ultimate CF SLX disc 9.0 Di2, 2020 Catrike Eola, 2016 Masi cxgr, 2011, Felt F3 Ltd, 2010 Trek 2.1, 2009 KHS Flite 220
Of course, the amount of training you "need" depends on your ambition, but if you regularly have an hour (or 90 minutes) to ride during the week and one or two longer rides on the weekend, I think you should be able to make progress. Something like 2 rides/weekend and 3 rides/weekday, with one of those weekday rides being hill repeats should be pretty effective, I would think.
Don't ride hard every time you go out. Alternate easy and challenging days.