...I do find that a short ramp up like @Pavel Macek describes can be helpful for getting in the groove and...
Warm Ups
The objective of Warm Up is to perform the minimal amount of work that prepare you for your top set in an exercise, as "Pavel Macek describes".
Work Out
Many individual turn Warm Ups into a Workout, ensuring that a top set is performed with less weight and fewer repetition that it could have been.
...You don't get to warm-up before an emergency of some sort.
Pavel punctuated this in
Power To The People and stated it in...
Truth About Warm Ups
This was my last class before traveling to the East Coast for two weeks. So I included some instruction I’ve been meaning to bring up again for some of the new people, and for my assistants. Friday we spent the first 20 minutes of class on movement prep. What is that? Briefly, it is what… Read...
www.kettlebellform.com
“Does a wolf warm-up before it chases a rabbit?” Not likely. Does the rabbit warm-up before it runs away from the wolf?
The “warm-up” as practiced in American, mainstream fitness culture, is a flimsy band-aid on poorly designed exercise.
a...A "warm up" ramp serves as technical practice
The Law of Specificity
The most effective way of Warming Up for a particular exercise is to perform it with that specific exercise.
As Steve W essentially states, one of the primary reasons is to "Grease The Groove", for technique.
If your technique is on in a movement, the bar should, metaphorically speaking, feel like it's on rails when you are pushing or pulling it; the bar feels like it is gliding.
The Mental Side of Warm Ups
One of the main reason many take long Warm Ups is they were taught to do, so they believe. In working with these individual to cut back, the main blow back is "It doesn't feel right."
My reply is, "Keep doing it until it does feel right." It more of a head issue than anything else.
A secondary reason, why some individuals taking more Warm Up Set with an exercise is it feel better for them the increasing load by gradually. They don't feel comfortable in taking larger jumps. This is also more of a mental aspect of it.
"Whether you think you can or you can't, you are right."
With training and life in general, many individual automatically decide they can't do something or something isn't going to work without trying it. Not trying something guarantees that it will never work.
I also have knee jerk reaction to anything new and different to me. Many things that I initially believed would not work are method that I now advocate. That because I researched them and then tried them.
Resolving Longer Warm Up Issue
I've found the key for individuals who feel the need for lengthy Warm Ups is to negotiate a compromise.
Allow them them to preform multiple Warm Up Sets but have them minimize the number of repetitions in each set to 1 - 2, as noted in the above post.