Ever heard of blood flow restriction training (BFR)? Essentially, some blood flow is restricted, the workout is harder at much lighter weights, and you can still realize hypertrophy and strength gains.
Who is this good for? Bodybuilders and powerlifters looking to increase volume but keep load and mechanical stress lower, older adults dealing with osteoarthritis who have a hard time performing heavy leg exercises due to pain, pre and post ACL tear for extra hypertrophy work on atrophied quadriceps.
There are plenty of other people who could benefit from BFR, too! Shoot me a message if you're interested in working with me, and getting some BFR training/rehab.
BFR is not approriate for everyone, of course, and if you can lift heavy without pain, then lift heavy. This will not necessarily help you get stronger if you're already able to do that.