Sharp, short, sudden leg muscle pains?

I've been doing 30 day shred on day 2... I have been getting sharp, short sporadic pains in my legs since I finished day 1. I've never had this before. My leg muscles are in great shape. The muscles don't ache that bad. Any ideas on this? I don't find it too serious.. as in it isn't disabling.
Also I think potassium isnt an issue. As my diet includes potassium rich foods.

Thanks in advance for any response!