Besides saving 10 - 15 minutes, what's the downside of warming up?
It runs the risk of using up resources better devoted to the training session proper.
PTTP is over 20 years old, ...
I posted a link to strength training programs and articles earlier this morning that hasn't been update in 20 years because most of what's in there is still good programming and good training advice.
... and since then there have been studies demonstrating that warm up has no negative effect on performance.
See above.
And if it may prevent getting injured I will rather do it. It also gets my mind into the training frame.
That preparation is mental and can happen quickly.
My point remains - one can get used to doing less warmups without suffering adverse consequences. Why do more than is necessary?
I can safely assert that almost every single elite athlete does a warm up is really all the evidence I need to tell me that they 'work'.
No one is suggesting warmups aren't useful, only that one can adapt one's self to doing less of them. I warmup by walking into my basement gym and hanging from the rings, swinging my arms back and forth, and doing some cossack-squat-like hip movements. I've never timed it but it takes a minute or two, I imagine. For me, it's sufficient. When I'm done lifting, I walk upstairs and get on with the rest of my life.
Doing what others do has never been a yardstick I measure myself against. I can't find any other powerlifters my age and size, either. To each his own.
-S-