I think it might be flexing. First you tense, which is the flex, then you relax.
Advantages and Disadvantages of Vegetative Propagation<span>. The offsprings are genetically identical and therefore advantageous traits can be preserved. Only one parent is required which eliminates the need for special mechanisms such as pollination, etc. It is faster.</span>
After eating, when waking up, before going to sleep.
When doing flexibility exercises it helps boost your metabolism and digest food, it also helps stretch your muscles after sleeping for many hours.
I hope this helped you.
