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  • Thanks for the advice. Yes it's in a pool so no wetsuit. I was also under the impression that water temp makes a big difference. For example I was regularly swimming 3 km odd at Gospel oak lido in the summer before work and what stopped me hitting 5k was fatigue. My arms were just exhausted and I felt I couldn't really continue. That's why I thought a sip of energy drink every km might help. Also the lido at the time was 24 which seemed perfect. I expect the pool to be closer to 30. How does that effect things?

  • 30°C is way to hot for swimming! A typical 25m council pool is around 28°C while a 'proper competition' pool like Stratford is more like 26°C.

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