Studies argue about whether mornings or evenings are better for strength. In real life, the best time to train is the time you can keep turning up.
Morning
Fewer things get in the way, and many people like starting the day with a win. Warm up a little longer: your body is stiffer first thing.
Evening
Your body is warmer and most people lift a little more. The gym is busiest from 5 to 8 pm, so check our busy-times chart if you hate waiting for a rack.
Pick a time, put it in your calendar and treat it like a meeting you cannot move.
