• Soreen works well for lots of people, but for me it feels like a brick in my stomach. Everyone is different. The right foods for you are things that you enjoy eating and that don't give you digestive troubles if you eat them when exercising.

    If you're worried, I'd suggest taking along a packet of dextrose tablets as a safety net. If you do have trouble and end up sitting by the roadside feeling nauseas, exhausted and grumpy then you may be glad of some very easily digested sugar.

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