Best way to build muscles and six pack abs faster??

No quick solution: If you want , could achieve with work outs several hours in the gym every day along with good healthy balanced diet , and thee is no ' faster ' over night solutions , good luck

Abdominal muscles: Abdominal muscles are used with flexing ("crunch") and rotating the trunk. A sit up actually works the muscles of the leg that cross the pelvis and are attached to the front of the spine. Keep this in mind while planning your exercises. Hope this helps!

Faster: There is no faster, its persistence AND diet, can't do one without the other. Working out the muscle, an adequate amount of cardio and proper diet....