The same exercise can be useful for muscle, strength, power, or endurance, but the record that proves progress changes with the goal. Without a goal, advice from different contexts gets mixed together.
What to compare in Onrep
Pick one goal for this training block, then choose one variable to keep stable and one metric to compare.
Changing exercises is not automatically bad. Variety can help you explore new angles, tools, and environments, but progress comparisons need at least one exercise pattern that stays stable for a while.
What to compare in Onrep
Even when you add new exercises, keep one reference exercise and its range of motion stable for 3 to 4 weeks.
Adding sets can increase practice and training volume, but if reps, range of motion, or rest time break down, you are no longer comparing the same ability. The useful set count depends on the goal.
What to compare in Onrep
Before adding a set, check that target reps, range of motion, and rest time stayed steady; if the next set drops sharply, adjust load or rest before chasing more sets.