no pins and needles in the hands scrap.

When im hitting the speedbag over the top of the right shoulder just feels a lot more tired than the left and just doesnt feel right holding the hand up. Theres no pain or soreness in it at all thats what's so strange about it, it literally just feels tired very very quickly into a session and there's a lack of power in my jab resulting from this.

I normally train 4 times a week....this has only really come on in the last few weeks and there's been no change to my training schedule so i dont know whether to just stay out of the boxing gym for the next few weeks but get back weight training and doing road work to try and stay in shape while im out. I dont think i hold my hands particularly high either, jab hand normally sits just on my cheek bone. The physio did say something about using the wrong muscle to hold it up but i think that was just a load of b****ks to be honest as he didnt seem to be able to give me any answers.

Thanks for all your advice so far.