There is no correlation between Myers-Briggs You know I be workin my Brachioradialis shirt psychological types and muscles. INTJ is a Myers-Briggs psychological type. A brachioradialis is an arm muscle. An INTJ who uses arms a lot is liable to have strong arm muscles, just like anyone else. There may be hereditary reasons for an individual’s musculature being different from someone else’s. If you have concerns see your family doctor. Now, the most important thing to keep in mind with forearm training is that they take time to grow. One big mistake a lot of people make, myself included, is impatience. Don’t expect your forearms to grow overnight. Give them at least 12 weeks and you will definitely see some good results.
In many people, the forearms, and especially You know I be workin my Brachioradialis shirt the calves, may have a preponderance of slow-twitch myofibrils. These Type I muscle fibres are not ideal candidates for goals involving hypertrophy. As far as a bodybuilder is concerned, these two body parts may be tough as hell to grow and require lots of hard, gruelling man-hours of labour to produce anything even remotely satisfactory. Other lucky buggers, and below is a photograph of one of these fortunate individuals, will have genetically loaded up on fast-twitch Type 2 muscle fibres and pushed their potential to the limit in the areas in question or even, now we’re talking bodybuilding Holy Grail, be double-muscled in either or both of these positions.