Hi :)
I have already got a 6 pack but it isn't very see able.
I need to do more exercise to increase its visibleness.
And how to get the lower abdominal muscles bigger.
Thanks

Which means I'll need to know some more exercises to help!
Can you suggest some please.

Lower abs are the one of the hardest muscles to define.

I suggest cardio, at least 30 minutes a day, 3 - 4 times a week.

And on top of that, try doing something called v-styles

You lay flat on your back, your arms stretched out, so you're completely straight. Then lift your legs (without bending your knees) while bringing up your body. Your goal is to make your hands touch your legs... making a V with your body.

I do not encourage this for those who do not normally work out... as this exercise is relatively difficult.

Yo, what I do is 50 situps a day... thats it. And guaranteed a nicer 6 pack in 2 months!

If you won't to work out your abs to make it an 8 pack you need to do more then just site ups. You need to work on your lower abs. Try this:
Alternating Supine Leg Walks

Start by laying on your back with your hands under your buttocks. Lift your legs so they are vertical. Contract your abs so your midsection is tense.

Then, lower 1 leg so your foot is a few inches from the ground. Hold there for about 1 second, then return that leg to the starting position. Alternate which leg you lower.

Try a reps and really try to feel the lower abs working.

Supine Reverse Crunches

Start by laying on your back with your hands under your buttocks. Lift your legs so they are vertical, then bend your knees at a 90 degree angle. Contract your abs so your midsection is tense.

Keeping your knees bent at the same angle, slowly lower them until the back of your feet are a few inches above the ground. Then, bring your knees up towards your chest and really squeeze your abs while doing this.

Repeat.

Leg Lifts

Start by laying on your back with your hands under your buttocks. Lift your legs so they are vertical.

Contract your midsection by engaging the upper abs.

Then, lower both legs so that the back of your feet are right above the ground. After holding that position for a few second, return your legs to the vertical position.

Repeat.

I always find that leg lifts work big time. You can lift left and right then center to make what you really won't. I hope this helped you. Please get back to me.

If you have a stable bench or a curl bar and you secure your legs (only) around it. You will be able to curl your upper body upwards
And having no security for your upper body allows your lower abs to work harder. A lesson from my muscular (jailbird )big brother.

Everyone has a six pack... it just under the fat on your belly... the less fat you have.. the more define it is... cardio, cardio, cardio... along with some hard abdominal training will give you your six pack..

I have a six pack almost eight pack you should eat what you already eat but to get strounger you should not exercise for a week let your abs form and then start working out a lot after a week.

I've completed my goal for a eight pack!

Listen to my advise it will work:)

Do more leg raises.. it will define your lower ABS