Agree with the other guys here. I bought my Merida 5 years back from shop a few Kms from my house and thought "I'll ride it home" - not figuring the big uphills from there to here. I ended up walking most of the way. Now few years on, I'm comfortable doing 90km to 120km fun rides, and even look forward to the hills. Here's some of the things I learnt along the way that worked for me: training more was the biggest thing - building up gradually as other guys have mentioned already. spin classes initially helped quite a lot with my aerobic fitness, but didn't do a huge amount for my overall cycling ability (see the thread on Knees and spinning for some of the downside) on longer rides - your body needs fuel as well as water/hydration, so find out if there's an energy drink you like and works for you, or bars/chews, or bananas, or even as a friend of mine uses, a pack of small cooked potatoes. you'll also probably find on hot/long rides you need electrolytes too - to put back some of what yous sweat out. Again, energy drinks or gels etc have these. Wouldn't worry though for shorter rides - shouldn't be an issue unless you're out longer than an hour or two. at some stage, get a proper bike setup check done by a pro - it's amazing what a a little difference can make in cleat position, saddle height or fore/aft setting, handlebar reach or height etc. My LBS charged R250 and took close on a couple of hours doing it - money well spent. For hill climbs specifically: I tend to like to alternate sitting and spinning up the hill, with standing to stretch my legs out. When I stand I shift up two or three gears harder to keep a roughly equivalent rate of effort. If I don't stand, I often cramp later on in a ride from being sat in one place too long Check what gears your bike came with - my front crank was a 52/39 (outer/inner tooth count). As a middled aged guy who was used to mountain bikes that made for very very hard to turn pedals on steep climbs, putting a lot of strain on legs and lungs and not letting me spin. I swapped it out for a 50/34 (known as a compact crank) this season and have really enjoyed the change, even though it loses a bit of top end speed on the flats and downhill. This year specifically I started with a personal trainer (who is an ex-cyclist) at the gym to work on my core strength. I wouldn't advocate this initially. It's something I needed to give me a kick and get me working harder after I'd got some basic training and fitness. It has helped enormously with reducing cramps, and I find now I climb hills in a very different way - I seem to be working from my hips and stomach muscles not just pushing and pulling with my legs. Something to consider when you get fully bitten by the bug! Most important though - keep training and make sure you enjoy the rides and look up at the scenery. The only rides I really battle are the ones where I forget to look at our magnificent countryside. Edit: added bit I forgot about personal trainer.