Doing the same intense weight workouts all the time might lead to worse performance and overtraining in people who already lift regularly.

When people do really intense weight training, not everyone gets overly tired or performs worse — in fact, more than half of the studies didn’t see a drop in performance.

Most studies on intense weight training don’t check how well people recover afterward, so we can’t tell if the training helped, hurt, or caused serious burnout.

If someone's strength keeps dropping during weight training, that might be the best sign they're overtraining—because no blood test or body measurement has proven to reliably catch it early.

For people who already regularly lift weights, doing more sets per week does not reliably lead to more muscle growth than doing fewer sets.

How much you lift in total each week matters more for results than whether you do it in 2 days or 5 days—unless you’re trying to get stronger, then frequency helps a bit.