I disagree.
Ive literally won 24hr solo xc races on fruit and water with organic medjool dates being my preference.
Chia seeds are full of fat and protein. They literally take days to digest where as fruit is INSTANT fuel in that it contains fast acting glucose and slower acting fructose. Look at what the gel companies are trying to do: they are using the same ratios of glucose/fructose that most fruits have as science has shown an athlete can take in more sugars per hour aka conserve glycogen stores therefore go harder for longer.
My suggestion is buy boxes of organic medjool dates. Aim for 1g of carbs per kg of bodyweight per hour. So for me at approx 65kg thats around 4 large medjool dates per hour. Pit the dates prior so you can just pop em. Squirt some water in your mouth and chew. There you go. The BEST fuel for any human. Nothing comes close hence why athletes that get majority of their calories from fruit will always outperform themselves when using other fuel sources.
I train around 20% of the average cyclist/runner. My strava times indicate otherwise.
I just ran a 34:19 for 10 000m on Sunday. On just 20km a week jogging. Fruit sure is magic food..