Your ideal racing weight would be the perfect balance between having enough muscle to generate power and having low amounts of excess weight to make you most efficient.
If your goal is optimal performance, you need to realize there are trade-offs between power, fat mass, muscle mass and endurance.
In hybrid sports such as CrossFit, Hyrox, Spartan Race it is a trade-off an athlete needs to make, which can be challenging for their mind.
If you are a CrossFitter deadlifting over 500lb, you might need to lose some weight to run faster, more efficiently, and improve your endurance. Lowering your maximal lifts can lead to improvments of your overall performance.
If you are a lean runner, you might need to gain muscle, eat more, and therefore gain weight to run injury free, faster, and more efficiently. Your weight might go up, your 5k time decrease, but your overall performance increase.
The problem is that athletes don’t want to lose their hard-earned performance. Psychologically, we are more motivated by “avoiding loss” (losing something you have) than by “potential gain” (getting what you don’t have).
If you are married to your current weight, training and approach, it will be a mental challenge. Working with a coach
in a situation like this is a huge help.
It is important to find your ideal racing weight. In the Spartan Race, it can differ between distances Sprint, Super, Beast , UB and Trail.