I had been doing alright since I posted here last time, so I almost forgot this. Recently, I adjusted my exercise form for lunge, dip, and squat to make it deeper. Then BAM! The restlessness came back. So, it seems that what I felt as "restlessness on my legs" is a form of muscle aches. I'm doing workout DVD, so it usually includes some stretch at the end. I also do pilates, often after workout DVD. Maybe my stretch is not enough to relax my legs. I don't know. I am going to add more repetitions for leg stretch and do massage after workout. I'll see how it works. Oh, and of course, I try drink more WATER!