The only part I am having issues with toning up are my abs. Everything else I dont seem to have a problem with. I can feel all my ab muscles but only the top two are visible. [/quote]
As Phill wrote, you can’t spot reduce. In order to see your abs, you’ll have to decrease total body fat. The problem is, you’re alredy skinny, and most likely “last pieces” of fat are hanging onto your belly
Now, if you take a look at female track & field athletes or fitness/figure competitors, who all have low body fat levels, you’ll see that they also all have noticable muscle mass in upper and lower body; and some numbers in gym/on track to show. In other words, in order to reach that level of leanness, they had to focus on building muscle and improving performance.
Anyway, you definetly have to look into HIIT (High Intensity Interval Training). Research has show it’s superior to steady state aerobic activity for fat loss. In essence, it’s a training protocol where you alternate between periods of maximal or near maximal output for 20-40 seconds, and periods of recovery for 20-180 seconds. You can, for instance, sprint for 20 seconds (or for a short distance 100-200 m), and than jog/walk for 40-60 seconds; and repeat it a few (5-10) times. It can also be done on a bike, eliptical trainer, with rope, with body weight exercises or with weights/machines. Every week, try to decrease the rest time a bit (5 seconds off is plenty), and also, after some 4-5 weeks of regular training, take a week off.
If you’re not certain about it, well, you can try it at home for 15-20 minutes with exercises outlined here:
Renegade Training (GPP section)
Also, check out: Running Man
And, you might find this interesting:
Hope this helps.