I have incorporated dumbell bench-presses into my workout routine. I use progressive overloading, so every second or third workout I increase the weight I lift. Until now it has worked well and I have progressed well enough, but now I have run out of new weight plates to add (I do it at home, because I do not have gym access right now and I have restricted amout of plates obviously). So my first idea was to place plates from one dumbell to the other and I would do the bench-press with one arm at a time. So one set would consists of a same amount of reps with left and then right arm. But I do not know if is there any contraindication and will have this kind of excercise such benefits as normal dumbell bench-press has? Thy for your kind help!
One of my favourite authors, Dan John, talks about the one arm bench press in his Easy Strength program, and how it should be a staple movement for horizontal pushing strength, as well as promoting symmetry across the body (if you can do 60kg for 5 on your right hand side, but only 30kg for 2 on your left, you may be a little asymmetric).
The only contraindication that I can see is you might get a few funny looks if you perform it in a commercial gym as it's not a particularly well known exercise. That and the possibility of a stronger core from having to stabalise the uneven load (hint: leave your unloaded hand free, don't be tempted to grab onto anything to help).
Basically, it's a great exercise, go for it!