Maybe some yoga asanas or chi gong practice could be helpful against the tensions?
I know these kinds of movement during meditation as a phase. It is coming for a beginner and it is going when the topic is finished.
Tensions in the body relate to mental issues also, in my experience. But one can resolve it also with physical exercises.
Metta, Karuna, Mudita, Upekha
*** May these efforts be helpful.
Djang chub sem chog rinpoche, ma kye pa nam kye gyur chig. Kye pa nyam pa me pa yang, gong nä gong du phel war sho._()_**