Garmin has rejiggered its Forerunner smartwatch line with a greater emphasis on the needs of runners -- tracking stats and analyzing them to understand your performance, training history and goals.

The new line consists of five models: the Forerunner 45, 45S, 245, 245 Music and 945.

The entry-level Forerunner 45 and 45S series will ship in May starting at $199.99.

These have heart-rate monitoring via a wrist sensor and GPS; the 45S is a smaller size of the 45, at 39 millimeters versus 42mm.

Features include tracking for more workouts in addition to running, 24/7 operation, steps, distance, calories and sleep.

Battery life is rated for up to 7 days (13 hours as a GPS).

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