This is probably a good idea; however, this does not mean that you need to stretch, roll around on the ground and perform “activation” drills for 15 minutes prior to being ready for exercise.
There is no perfect warmup for everyone. The best warmup depends on what your activity level had been that day and the specific activity that you are preparing for (among many other things). If you are getting ready to run, perform activities that practice things necessary to run effectively. If you are going to lift weights, practice movements similar to the lifts you are going to perform (ie. If you are going to squat, then squat in your warmup!).
Furthermore, if you have been sitting at a desk for the majority of the day, you may need a more comprehensive warmup. On the other hand, if you have an active job requiring you to move in a variety of different ways then your warmup can be the activity itself.
Animals don’t require extensive warmups prior to sprinting. They have been walking, standing and moving all day prior to ramping things up when nature necessitates it. If you have been active the majority of your day prior to training, be like a cheetah!
A small warmup is often necessary however be purposeful about it rather than mindlessly performing the same thing each workout.
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