Of course everyone is individual, and I wouldn't tell someone not to do something. I can only provide the facts and the info and let people make up their own minds.
I guess I'm maybe luckier than you as I can hold onto mass whilst doing a fair bit of cardio - genetics aside, it is absolutely possible to maintain a good CV health whilst building muscle, anybody telling you otherwise doesn't know what they'er talking about. I appreciate you're not too bothered about fitness and you're after size and shape - and you've done brilliantly, and it shows - however, all I can say is, don't let it creep up on you - it's so easy to over look CV fitness. It doesn't mean you have to be able to do an ironman or a triathalon, but a medium amount of CV fitness I think is absolutely necessary.
You don't have to go on a treadmill (I don't understand why you'd want to!), however, a couple of games of basketball or squash a week for 30-45 mins is a good place to start. Or doing some skipping or some rowing, or rugby, or some form of exercise, it doesn't have to be "CV" oriented - it will help develop your CV fitness.
Your heart is a muscle, your lungs and ability to move oxygen around your body will also affect your ability to transport nutrients, and improving your capillary functions - you're whole circulatory system, all your organs as well. It's such a big deal. The better your CV health the more able your body is at dealing with the nutrients it needs to build new muscle, rather than it being strained at dealing with lack of blood flow and the congestion owing to fatty deposits on your organs (visceral fat).
I just find it strange, that people spend a fortune on supps, gym memberships, and hours on forums and in the gym tweaking their diets, their routines, and change their lives to improve their bodies - then do nothing about improving the insides of their bodies. It's all very well having the body of a Ferrari but have an old rusty tractor engine underneath it defeats the object.
For me it seems daft for it to be mutually exclusive - why not have both? Give yourself more chance of accelerating your gains and also make yourself healthier?!
You're all probably still young, and feel indestructible, but it can creep up on you quickly. Coronary heart diseases could take years even decades to manifest itself, a lot of bodybuilders and strongmen have heart problems later in life. I'd rather stand tall and proud in my 40s, with the body of a 30 year old and the heart of a (fit) 20 year old. Than be the biggest and the best at 30, and needing oxygen tanks around me in my 40s. Sure, I'm being extreme, but it's such a fine balance, and doesn't take much effort to improve your fitness.
It's just something for you all to think about. I'm not saying you're wrong not to do it, but I couldn't live with myself if I didn't let everyone know so that they can at least make up their minds.
...
Otherwise I would as that really knackers me out!
, 30 seconds on the bag, jumping jacks and so on. With 30 seconds rest. Repeat that 4 or 5 times and you'll be blowing.
