Some ideas on exercises:
Do reverse hypers if they don't hurt. This is commonly used for low back rehab.
Try front squats instead of back squats. More vertical back angle and less risk of lumbar flexion. Usually, when form deteriorates, you'll dump the bar forward. With back squats, you can complete the rep with atrocious form if you are determined.
Leg press - but do them single leg. Double leg opens you up to lumbar flexion, which is much more easily avoided with single leg leg presses.
Single leg deadlift. Very easy to avoid lumbar flexion, but hard to really load the movement, but you'll still feel it in your hamstrings and glutes.
Don't do situps. Loaded flexion is what you want to avoid, especially with a herniated disc.
Hang from a pullup bar after doing exercises that challenge your lower back; will help relieve spinal compression.
Do reverse hypers if they don't hurt. This is commonly used for low back rehab.
Try front squats instead of back squats. More vertical back angle and less risk of lumbar flexion. Usually, when form deteriorates, you'll dump the bar forward. With back squats, you can complete the rep with atrocious form if you are determined.
Leg press - but do them single leg. Double leg opens you up to lumbar flexion, which is much more easily avoided with single leg leg presses.
Single leg deadlift. Very easy to avoid lumbar flexion, but hard to really load the movement, but you'll still feel it in your hamstrings and glutes.
Don't do situps. Loaded flexion is what you want to avoid, especially with a herniated disc.
Hang from a pullup bar after doing exercises that challenge your lower back; will help relieve spinal compression.