I'm a new runner that has been speed running this game for a week now. I was wondering if ZigZagging is just as effective on analog as it is on D Pad; because I prefer using the analog. Do i have to switch to D pad to get a decent time and Is there any other runners who use analog?

Your zig-zagging will never get as good as top runners while using analog. I think there might be like 1 or 2 people in the top 20 who use analog, but that's it. You should probably just try to get used to d-pad as soon as you can, if you're planning to get serious.

unless you have an analog that maps d-pad inputs, then its fine. zigzag is effective on that. otherwise it's not really good