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Distance Recording
The Forerunner device measures and records distance by completed pool lengths. The pool size must be
correct to display accurate distance (Going for a Pool Swim, page 12).
TIP: For accurate results, swim the entire length, and use one stroke for the entire length. Pause the timer when
resting.
TIP: To help the device count your lengths, use a strong push off the wall and glide before your first stroke.
TIP: When doing drills, you must either pause the timer or use the drill logging feature (Training with the Drill Log,
page 14).
Swim Terminology
Length: One trip down the pool.
Interval: One or more consecutive lengths. A new interval starts after a rest.
Stroke: A stroke is counted every time your arm wearing the device completes a full cycle.
Swolf: Your swolf score is the sum of the time for one pool length and the number of strokes for that length. For
example, 30 seconds plus 15 strokes equals a swolf score of 45. For open water swimming, swolf is
calculated over 25 meters. Swolf is a measurement of swimming efficiency and, like golf, a lower score is
better.
Critical swim speed (CSS): Your CSS is the theoretical speed that you can maintain continuously without
exhaustion. You can use your CSS to guide your training pace and monitor your improvement.
Stroke Types
Stroke type identification is available only for pool swimming. Your stroke type is identified at the end of a
length. Stroke types appear in your swimming history and in your Garmin Connect account. You can also select
stroke type as a custom data field (Customizing the Data Screens, page 84).
Free Freestyle
Back Backstroke
Breast Breaststroke
Fly Butterfly
Mixed More than one stroke type in an interval
Drill Used with drill logging (Training with the Drill Log, page 14)
Tips for Swimming Activities
• Before starting a pool swimming activity, follow the on-screen instructions to select your pool size or enter a
custom size.
The next time you start a pool swimming activity, the device uses this pool size. You can hold , select the
activity settings, and select Pool Size to change the size.
• Select to record a rest during pool swimming.
The device automatically records swim intervals and lengths for pool swimming.
• Select to record an interval during open water swimming.
Activities and Apps 13
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