Extreme fitness challenges pose various risks, including physical injuries and potential long-term health issues. Participants may push their bodies beyond safe limits, increasing the likelihood of muscle strains, joint injuries, and even cardiac events. Mental health risks, such as burnout and decreased motivation, can also occur due to excessive stress or pressure to perform. Overtraining without adequate recovery can lead to diminished performance and increased susceptibility to illness. It's essential for individuals to approach extreme fitness challenges with caution, emphasizing safety and balanced training to avoid serious repercussions.