Here's how I think something like this should work:
A "substitution list" would let you add alternatives to the exercise that you approved. So you could add bench press and dumbbell bench press, and the client could substitute bench press for dumbbell bench press, but nothing else. Basically, this is a group of exercises, but it shows one at a time to the client.
We can use this either for substitutions or progressions/regressions depending on what exercises we add and what we tell the client to do.
On the trainer side, in the workout builder, the easiest way to do this would be to add all the exercises you want in the workout, select them all, then instead of selecting superset, they would select a new option call "substitution list" or "substitution group". It then groups them like a superset, but is labelled as a substitution group. This way the trainer can see all exercises, and most importantly can view tracked results and set up progressions without messing things up. As far as progression spreadsheet and progress graphs are concerned, they are showed in the same way a superset would be, though ideally with some sort of visual cue.
On the client side, it simply hides all exercises in the list except for the first exercise. They would be able to substitute different exercises by clicking a button. It should be visibly different than a standard exercise. Once subbed, the new exercise is active and will be visible in subsequent workouts, while the rest are hidden (but can be switched to with the sub list).

While the client is performing an exercise if they think it’s too difficult they can click “regress” and Trainerize would recommend alternative exercises.

When a client hits substitute, they are presented with every exercise in the library. Instead, it would be nice for it to at least be narrowed down to the same muscle group. If a client is scheduled to do a squat, they could be presented with a goblet squat, not pullups/curls/etc...

I've seen this idea selected as planned something like 6 years ago?
This would make a HUGE difference in the quality of the training plans , especially when given to a bigger group of people, that would hugely help decrease amount of injuries and drop offs.

Just signed up with Trainerize - I don't think I can continue to use this software without this feature. Way too time consuming to have to constantly edited someone's workout individually. It would be nice to set this up in the training program rather than edit it indiviudally.

Still waiting for an update!

Would love to have this feature!

This idea has been labeled as planned for 5 years. Any chance of getting this implemented soon? This could be a huge feature!

+1 for this feature please! 2014 seems a long time to have been planned. Hope this happens soon.

Was going to comment this a long time ago. Glad to see it's planned..... BUT THAT WAS IN 2014!!!!!!

PLEEEEEAAAASE DO THIS ASAP

:)

Who's with me?

Love to see this in the near future.

Any progress towards this?

Yes please as it is a staple in most result based programs

Any headway on this feature? I feel like this is a must-have

Llke this one! I just posted something similar just now about editing programmes from the progressions sheet! Lets get this thing moving!!

http://ideas.trainerize.com/forums/167887-general/suggestions/34679158-being-able-to-programme-through-the-progressions-s

I work a lot on peoples posture moving progressively through movement patterns so being able to set up progression and regression exercise would help to put in larger scale plans

Trainerize - Please make this happen! As mentioned in a previous comment, having to go into a workout or a program to make this change is tedious and not on the side of the coach who wants to scale his/her business.

Please make this happen. This idea was marked as 'Planned' in 2014. It's 2018.

Genuinely surprised to see how long this suggestion how been here. This is almost a necessity in today's world.
I have all clients on ProCoach and some of them doing ProCoach workouts (from Precision Nutrition) and this is one of the most raved about features; the progression and regression feature.

This would be fantastic. I agree with Dave, I coach calisthenics/gymnastics/bodyweight exercises and this would make life 1000x easier.

Is there any movement on this? I love this software, but a protocol (reps, sets, exercise order etc.) becomes obsolete if I need to change an exercise. Say the difference between a front squat and back squat = take out front squat, put in back squat, re enter reps & sets. And then re-pair supersets or tri-sets if I have them in the protocol.