Suggest Treatment For Recurring Muscle Spasms/cramping

What do I due to stop recurring muscle spasms/cramping of the muscle/tendon that runs along the upper/outer side of my left foot - runs from just below the transition from leg to foot down to just before my toes although sometimes my toes will become pulled into it and point at the ceiling. I am female, just turned 47 =(, and in basically good physical health, usually work out consistently although the last two months have not been able to work out as regularly.