Hi... Those involuntary movements waht you have could be muscle cramps... This can occur if you are sweating a lot..if you don t drink enough water .that is dehydration.. I suggest you to Drink lot if water ... preferably with some ORSalts.. Do some moderate exercises regularly... Don t spend too much of time in hot environment... Do have cold showers regularly.. Do go for swimming once in a week to relax your muscle... Do proper stretching for the whole body to improve overall flexibility... Hope this is helpful for you.. Revert back incase you need any further clarification...