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Estimate your Critical Swim Speed (CSS) pace from two time trials.
Longer time trial (e.g., 400m)
Shorter time trial (e.g., 200m)
Critical Swim Speed (CSS) is the theoretical swimming speed that can be maintained continuously without exhaustion. It's calculated using two time trials of different distances.
The formula: CSS = (D2 - D1) / (T2 - T1), where D is distance and T is time.
CSS is useful for setting training paces and predicting race times. Perform both time trials on the same day with adequate rest between them.
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