Do Chia Seeds Improve Athletic Performance?

There is strong evidence that supplementation with Chia seeds doesn't directly boost athletic performance (Appalachian State University study) but it might be one of the best sources of several important nutrients and improve our overall performance over time.
A one-ounce (equalling 28 grams or about two tablespoons) serving of chia seeds contains 11 grams of fiber, 4 grams of protein, 9 grams of fat, 18% of the reference daily intake (RDI) of calcium, 30% of the RDI of manganese, 30% of the RDI of magnesium, 27% of the RDI of phosphorus. Very rich in fiber chia seeds give the ability to absorb 10–12 times their weight in water which is expanding in the stomach and should increase fullness, slow absorption of the food we consume, and help us automatically eat fewer calories. Chia seeds are a very good protein source which is the weight loss friendly macronutrient and can reduce appetite and cravings. Calcium, phosphorus, magnesium, and protein are important for bone health.
Chia seeds can be added to anything. They don't need to be ground and can be eaten raw, soaked in juice, added to porridge.

Source: https://www.mdpi.com/2072-6643/7/5/3666/htm

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6627181/