actually you can opt not to carry big backpack, just a small sling bag with tracksuit (for early morning climbing, its kinda cold in the morning), some power bars and water is enough and of course cash. You can buy food at laban rata, and do your dry cleaning if needed there.

This post has been edited by VeeJay: Jun 23 2011, 11:15 PM

Yes Batu Caves.
I went there three times every week to 'train' before I climbed Mt KK. Back then I was 12 years old btw.
I also climbed Penang Hill for training once. Didn't really do anything else other than that.
And yes I made it to the peak.

Breathing difficulties quite hard to say I think. Some may be very fit but still encounter breathing problems. My parents have climb Mt KK at least 7 times. They haven't had any problems with breathing difficulties before. Can be quite cold though, be sure you are well prepared for the cold weather.

I've had family relatives who went up with my parents previously, some of them were already vomiting non-stop at the hotel at Laban Rata. So they couldn't continue the climb for the 2nd day.
As for me, I did feel a little nausea when I was near the peak but still made it up and down without much problems.

If I had a bad stamina, still able to climb?
Try 2hr hike at one of the bukit, stopped multiples times.

if u mean climbing mount kinabalu with bad stamina, i think u shouldnt try.

Can climb, but will struggle.
Don't forget you will be carrying your backpack unless you hire a porter, but I suppose that depends on your goal for climbing.

I'm quite fit but still, I was limping for a week after the climb.
Hike often, that would prepare your body slightly for climbing uphill and downhill.