New answers tagged endurance
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If we assume that energy used by an individual athlete during a run (without elevation changes or wind) is dependent only the distance of the run, then the difference between a fast 5k run and a slow 5k jog, and the explanation for why the former will leave you more out of breath, is the rate of energy expenditure. A 30 minute 5k run requires you to burn ...
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(Aggregating my comments.)
Pumpkin seeds are a great source of Mg (and other things) and great in muffins, especially pumpkin spice muffins (and zucchini bread, and apple sauce muffins, etc.)
For long-ish rides I personally trend towards electrolyte drinks with Mg; higher bio-availability. That said, I'd make sure there's actually a need for supplementation ...
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Since you don't specify that the magnesium source must be a whole food, just adding magnesium aspartate, either purchased as a powder or in pill form and ground up and dissolved, would be the easiest way to add magnesium to your muffins.
But, that said, your question makes several assumptions, any or all of which could be wrong:
Your diet may not actually ...
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