引用:
原帖由 futfuk 於 2009-7-9 04:30 PM 發表 
ya. just lift up ur legs, but don't let ur leg touch the ground with you lower it..... u'll feel your lower ab tightens
nono, just 20 reps
Aw?
Usually when I do it, I hold for 10-15 secs and do it several times
They are same thing but different ways though
Try to have the "V" shape (upper body + lower body, both raise and don't touch the ground except the part above butt )
That one is tough -.-
I can't hold even for 15 seconds
