Make sure you’re doing yoga if you’re doing heavy lifting. It’s kind of like cleaning up as you go so to speak.
Also when you’re talking about heavy weights low reps, what kind of rep numbers? Under 3? If so, then doing this often and you’ll definitely face injuries. Never do super low reps like that. Especially to failure. If you want strength gainz, do at least 3-6 reps per set. Just up the sets. And also don’t go to failure on any set except maybe the last. Going to failure on each set and you’ll have these tendon and joint problems.
The science is clear that the muscle protein synthesis stimulation between an RPE of 8-10 is relatively the same. Meaning leaving a couple of reps in the tank versus going to absolute muscular failure brings just about the same results.
So for strength, I’d say, put ego aside and work with weights where you’re getting 3-6 reps without going to failure. And work on improving, once you’re getting past 6 reps easily, increase the weight. Now you’re getting stronger safely.