Remember - fewer options for warm-up weights means less to think about, which is generally a good thing. Warm-ups weights should be intelligently chosen, but you generally don’t need razor-sharp precision, and if you do, it won’t be until your last warm-up.
Mistake #4: Taking Too Much Time Between Warm-up Sets
Don’t rest between your warm-up sets.
Perform a warm-up set, load the weight for the next warm-up set, then perform that warm-up set, and so on.
Ample rest is very important between work sets, but we’re talking about warm-up sets. Since they are warm-ups, they’re not heavy yet, and the act of changing the weight between sets will provide enough rest for your next warm-up set.