Abs general

Might be related.

When I do situps or crunches or whatever, I always get pain in my lower back. How do I fix it?

Cardio + core exercise. that's the fastest way

youtube.com/watch?v=jINgwwDTeOw
this is some good ab workout
don't bulk, don't cut
Just start doing HIIT around 3 times a week
the first week, do 5 sets of 30 seconds as hard as possible and 60 seconds resting, the second week do 30-30 and keep it until you can make more sets
this is the best way to lower your bodyfat without losing muscle
also if you're preparing for a specific date you're going to the beach with friends or something, or you're gonna take a sick picture for tinder, you might wanna try 8-10 days without carbs
I wouldn't do this, basically because I've had this goal in mind since last year and I've been earning it the proper way, but with your body, it wouldn't take much more than this.
by mid-july or august you could have some visible abs

Do a set of lumbar raises for each an set. Some people get badly unbalanced from overdoing abs and not doing back.

>7:15
>dat ass