Always seek progression in Fitness.
Sure, there is a stereotype that trainers are always trying to get their female clients to lift heavier and to get everybody in general to work harder. If both clients and trainers can buy-in on the idea that progressive resistance is crucial for results, then together our work is more effective.
“You always have to go heavier,” is a Big Myth!
Not everybody can, will, or should continue to go heavier on various exercises. That being said, going heavier than your last effort on a particular exercise is one of the most obvious methods of progression and yes, it will work. So when you can, try to go heavier because you’ll burn more fat, tone the body, and gain confidence.