Ab exercises, how often?

[73kittycat73]

Hi. I'm new to working out. I have been exercising for about two weeks now. 25mins a day exercise bike, a short chest with weights session (YouTube vid.) and Abdominal Leg Raise and crunches. Currently I do three sets of ten reps each.
I don't feel like this is enough and have found these exercises: www.self.com/gallery/21-incredibly-effective-abs-exercises-you-can-do-instead-of-crunches
I plan on doing number 2, 7, 11 and 20. However, it doesn't say how many reps you do of each, or how many times a week. I'd be really grateful if someone could give me any advice? Thanks for reading.

The abs you linked are mostly plank variations. Plank is more based on time than repetition so you would hold it for 1 minute or more. You can tear the cartilage in your ribs with the plank, so don't overdo it. I am not a big fan.

a set of 10 for any abs isn't enough to fatigue the muscle. Aim at 25, 50 or 100 for the basic crunches. Leg raises again is a so-so exercise. Very bad for the back.

There are tons of variation of exercises changing the angles, heel touch, frog, up in 3 down in 1, ball bouncing on wall, mountain climber.on opposite elbow ...

Thank you TheFirie. Will have a think about that then.

Hello, I do the plank before, but a bit hurt my back. Then I did the boxing training, it is the whole body exercise. My abs and bum got firm, have a nice body tone now, after three months of boxing, I lose 1 stone, amazing! It is interesting and fun.