If you're looking for training your abs seriously, try hanging leg raises. These will really hit the lower part of your abs and train your grip strength at the same time, so get ready to be suprised how hard this will get after a couple of reps. If you can't do l pull ups or you just want to stick with ab training, then this is the best thing you can chose. You can use variety of grips while holding the bar but overhand grip is proven to be the most comfortable. Wide grip is also great, as it reduces the unintentional swinging and kiping. Your 6 or 8 pack abs are waiting for you to earn them, so no excuses and go grab that bar and lift your legs up!

L pull up is a great exercise that will not also build your upper body, but will also hit your abs like a truck. It's not an easy exercise, it requires a lot of abdominal strength and should be performed as slow as possible. Isometric contraction of your abs will pay out tommorow in sore muscles. If you can't perform this exercise, then try something different like l hang or hanging leg raises. If you can easly do plenty of l pull ups, then kick it up a notch by mixing the exercise with different kind of grips or grip widths. I recomend wide grip, overhand, l leg raise for a killer workout.

This is another hand positioning push up variation, designed to hit your triceps and shoulders like a truck loaded with lead! I tryed to combine this with decline push ups in my bodyweight routine and I have to say, it was hard as hell! Name of this exercise comes from the hand positioning (space between hands is shaped like a diamond). Some also like to call this exercise "triangle push up", but I'm sticking with this name (it's just so fancy!). It's my favourite kind of push up, no doubt. Anyways, enjoy this and keep building your upper body!

Close grip pull up is one of the basic variations of the basic pull up. Putting your hands closer togather helps to activate your biceps more then in regular variations. Combining this exercise with underhand grip is proven to maximize the pressure on your biceps muscles (close grip chin up).

Wide grip pull up is a pull up variation that focuses more on your latissimus dorsi (lats). With this fantastic upper body exercise you can build that v-shaped back like Bruce Lee had. Since the most of the strain is put on your back, it is more advanced and harder exercise than regular pull ups. It is adviced to do this exercise with overhand grip for maximal lat workout. What I like the most about this variation of pull ups is fact that with your arms wide on the bar, it's harder to unintentionaly swing or kip. Since your arms are wider, you have a little bit shorter way up to the bar, but don't think that this exercise is easier in any way than a regular pull up. Check it out yourself if you don't belive me!