Make it or break it

As explained by the actress who plays the role of Emily, except for Ayla Kell (Payson) and Josie Loren (Kaylie), the actresses are dubbed. They only perform the beginning and the end of the movements.

Hello, you can watch "Championne à tout prix" at http://streaming-free.org//subcategory/491/championnes-a-tout-prix-make-it-or-break-it

it's a free streaming site without interruptions.

I did some research and they all did gymnastics before filming the series, and that's why they were hired.

Doubles / Stunts: In the series, all the actresses Ayla Kell (Payson Keeler), Josie Loren (Kaylie Cruz), Cassandra 'Cassie' Scerbo (Lauren Tanner), Chelsea Hobbs (Emily Kmetko), Nicole Anderson (Kelly Parker), etc. are obviously doubled by high-level female gymnasts, as the production could not afford to have injured actresses. One might expect there to be official doubles, but that is not the case (certainly due to the shooting schedule and the availability of the gymnasts). Consequently, different gymnasts have doubled our favorite actresses and have sometimes even doubled several heroines. (Source link on "IMDB - Internet Movie DataBase," under "Series Stunts").
Behind the scenes, a short video (in Original Version (English)) shows the actresses training in gymnastics. For those who do not understand English and to summarize the video, some actresses found it easier than others depending on their sports backgrounds. In their interviews, the actresses say that their training was tough and complicated, but also that they were forbidden to perform difficult gymnastic moves even if they wanted to (due to insurance policies because they needed to avoid injuries anyway). They also say that their gymnastic doubles are, in a way, their "heroines."