No one wants to hear it, but the truth is that training has to get harder over time if you want to keep making progress. If you do the same exercises, with the same weights, with the same number of reps, week in, week out, your body will adapt to the stress imposed upon it, and you’ll stop making progress.
If the stress generated by training doesn’t increase over time, you’re treading water. In physiological terms, it’s called homeostasis. It’s also why squatting 80kg will always feel heavy if you only ever squat 80kg. Get your squat up to 110kg however, and 80kg will feel lighter, simply because you’ll