The purpose of this study was to examine the potential relationships between accelerometer output and swim speed, and output and swim distance. Fifty-three competitive swimmers (age: 17.7 ±3.13 yrs.) fitted with two accelerometers completed two series of multiple swim bouts used to develop prediction equations for swim distance (m) and speed -formed using a subset of 13 swimmers. Significant relationships were found for accelerometer output and swim distance (R2= 0.81, p<0.05) and swim speed (R2= 0.64, p<0.05). Cross-validation for actual vs predicted swim distance and swim speed were significant (Swim Distance: R2 =0.96, p<0.001, Swim Speed: R2= 0.53, p<0.001). In conclusion, this study demonstrates that accelerometers have the ability to quantify individual swimming distance and speed with acceptable validity after the swimmer completes a swim bout.
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