depends which exercise ? first or following exercises ?, rep-range for the first working set ?
sometimes the time between starting Training and first working set is as Long as the time from the first working set to the last of that muscle-group.
i remember i did 12 sets of "warming up" in a icarian Squat machine, starting with two 55`s, last warm-up set i īdid 455 kg, and on the 1. Working set 505 kg for 5 reps....for the xtra load i placed a empty olympic bar on the top of the machine, and load that bar for the last 3 warm-up sets. For smaller muscles Groups like biceps/shoulders i do 3-5 warm-up sets, before the "real Training".
