Which Zwift workouts actually lead to significant gains in FTP, or is it all just a bunch of fantasy nonsense designed to make you feel like youre doing something worthwhile while pedaling in your basement. Inquiring minds want to know, do ERG workouts actually work, or should we all just stick to riding outside where it actually means something? Can someone please provide some concrete data and not just anecdotal bro science evidence that Zwift workouts are effective in boosting FTP? Whats the real difference between the likes of Jonathon, Matt Stephens, and the plethora of other structured workouts available on the platform - or are they all just pretenders to the throne, pretending to offer something they cant actually deliver?