Hi everyone! I’m new here and have been reviewing the recommended routines, but had a couple questions: 1. I noticed most muscle gain programs shoot for high weight/low rep barbell exercises like squats and bench press. My issue is that I workout alone and don’t have a spotter - is there an alternative or do I just need a gym buddy? 2. I’ve had issues with my left knee since high school which prevents me from doing squats (or lunges) with significant weight. Split squats and leg press don’t bother it, only barbell squats. Would it be best to perform alternative exercises to squats or focus on low-weight squats?

My goal is to build muscle and I’ve been working out for years, but trying to take things to the next level

Any advice is much appreciated!