I went swimming yesterday i haven't gone exercising in a long time woke up this morning to vibrating feeling on my left foot what could this be?89 lbs

Unclear: This could be simply from weakness in the leg (since you haven't worked out in a while), or could be an injury at your ankle/foot, or could be due to a pinched nerve. At this point i think it would be reasonable to treat with time/observation and anti-inflammatory meds (if necessary), and then see a physician if symptoms persist after a week or two.