As far as I know weight lifting makes your muscles tight. So is it possible to do weight lifting and still be able to maintain a flexible body?
Yes, this is absolutely possible.
I suggest you top off your workouts with a good full-body stretching routine. You can find a LOT of stretching routines online, they're a dime a dozen.
Additionally, I've had great success seeing a qualified chiropractor, because they will help reset your skeletal configuration (joints, ligaments etc.) which can suffer a bit of imbalance after a few months of serious training.
There's no reason why a muscular body (within reason) can't maintain, and even gain flexibility.
Certainly. Part of flexibility is fitness of the muscles, because the brain prevents movements which might be unsafe. By building up your muscles, you're training your brain to also recognize that you can support yourself in that position. As for example cases, type in "flexible bodybuilder" in YouTube and you'll find a bevy of cases.
That said, there are some aspects of bodybuilding which may work against being highly flexible.
- Extra bulk - At upper ranges, you may find that the muscle can get in the way, much in the same way that carrying a little extra weight around the middle can inhibit forward bends.
- Time - Becoming very flexible requires time. Body-building takes time. You will either have to expand your fitness regimen to include both, or skimp on one or the other.
- Order of operations - This is one of those tricky bits, when to stretch in one's exercise plan. Do it before you lift weights and you may weaken your muscles. Do it afterwards, and you run the risk of over-stretching while your system is still full of endorphins. And yet, if you wait too long between exercises, you have to warm up again, and you might just skip out on it because you're having to summon the motivation to do two separate workouts. I'd personally recommend stretching afterwards, but not relying on pain to determine when to stop.
We really need to start debunking the myth that weightlifting and body building decreases flexibility. I did body building for a long time before transitioning to powerlifting and strongman. If you are only doing bodybuilding and your exercises are being done correctly (full range of motion) then you will become more flexible and bigger at the same time. I never put a huge effort into stretching when bodybuilding, but I was much more flexible than the average person. Proper weight lifting will increase your flexibility.