Best Intra Workout Supplements for Endurance and Focus

1 week, 2 days ago Essential Supplement Reviews
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EnduranceEd Guest
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Apr 06, 2026 15:24

I am training for a Spartan race and my workouts are getting very long and intense. I am looking for a good intra workout supplement that will help me maintain my energy levels and focus for over 90 minutes. I have been using just water and some electrolytes but I feel like I need more.

I am looking for something that has a mix of EAAs, some fast carbs like cyclic dextrin, and maybe a bit of taurine for focus. I am in the UK and I have seen the Trained by JP Sustain brand which looks very promising. I want to avoid anything that causes a sugar crash halfway through.

What do you guys use during your longest sessions? I would love to hear about any specific stacks that have helped you push through the wall. I am really trying to increase my work capacity over the next few months.

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