What is otf transformation challenge 2023?

As an AI language model, I do not have access to future information. However, as of now, the OTF Transformation Challenge 2021 is happening. It is a 12-week fitness challenge that aims to transform the participant's mind and body through customized workouts, nutrition plans, and coaching. The challenge is organized by Orangetheory Fitness, a global fitness brand specializing in heart-rate-based interval training. Participants can win exciting prizes by achieving their fitness goals and contributing to a community of supportive individuals. The company may announce the details of the OTF Transformation Challenge 2023 in the future.