Lag on sprint

Does anyone know why there is a lag in starting to put the power onto a sprint and your peddling like mad but the speed on Zwift rises so slowly.
I use an Elite Rampa trainer.
Thank you in advance.

What sort of lag? In my experience there’s around 3 or 4 seconds between sprinting and the game responding. Is that the sort of thing you mean, or something significantly longer?

I’ve narrowed it down to the charastics of the trainer. Must be a normal response to trainer and game time. I’ve lowered the trainer difficulty level in Zwift to about 25%. This has helped smooth out the transition, but will need to gauge when to start the sprint or attack the hills to build up momentum so the trainer reacts more smoothly.

Absolutely. It’s one of the things all Zwifters have to learn - particularly those who care about racing.