Arms Stretching - Frontal Extension of the Arms With Fingers.
Muscles involved: Flexors of the fingers (deep, superficial, and the long flexor of the thumb)
Interlacing the fingers with the palms facing each other, turn the forearms and extend the elbows in front of you. As you approach maximum extension of the elbows, you will feel the tension in the anterior part of the forearms.
A very simple exercise, appropriate for any person who works intensely with the hands, like information technology, construction worker, manual workers, etc.