the Russian aircraft you mention that require the 4 minutes on the runway like to do it there, as they need to spool the engines higher than taxi power to warm them through. They do this on the runway to avoid blast hazard to other aircraft, vehicles, people etc operating close-by.
Also, when they roll for departure, they do not idle the engines again, as this has a detrimental effect to the warming process. They spool further to take off N1 and roll straight away.