I'm always watching my form and making sure I get the best ROM in my exercises, but I noticed something. I'll use chest exercises like flat dumbell press or incline press as an example. When I bring my arms all the way down until the dumbells are almost touching my chest, it feels as if they're not stretching or not being worked. On the other hand, if I go down just far enough to keep the tension on my muscles at the bottom of the rep, it feels like the muscle is being kept constantly under tension. I guess my question is: would it be better to keep my ROM at a tad less than physically possible in order to keep constant tension on the muscle, or should I just stick with a full ROM even though it feels like I'm getting a few seconds rest.
I've noticed this recently with a lot of exercises, like tricep cable pulldowns. When I lock my arms out at the bottom, there's a brief period where I feel the muscle isn't being worked. The same goes for when I bring my arm all the way to the top, my forearm ends up resting against my bicep.