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Calculating your CSS (Critical Swim Speed) training pace is a piece of cake! All you need is your 400 and 200 time trial pace. If you've got the first 100 split of the 400 all the better, as we'll be able to help guide you with your pacing too. Now, just enter your details in the calculator below "et voilà!" you're well on your way to faster, more efficient swimming!
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