Sign Up
7,167,378
Lifetime Meters
21,899
Season Meters

Last 30 Days Activity

Latest Challenges

Holiday Challenge November 27–December 24
January Revolutions January 1–31
Virtual Team Challenge January 1–31

View Challenges

Concept2 Blog

Dec 17 2025 Concept2 Year in Review: Moving Together
Dec 16 Holiday Season Erg Workouts
Dec 15 Two Decades of Concept2 Holiday Challenges and Counting
Dec 14 Twenty-One Holiday Challenges and Still Rowing

David Koffman

Log

Date Workout Score Ave Comments Action
11/12/09 25:01 5,552m 2:15.1 View workout
11/11/09 30:05 6,258m 2:24.2 View workout
11/09/09 15:12 3,392m 2:14.5 View workout
11/08/09 30:04 6,563m 2:17.4 View workout
11/07/09 30:39 6,558m 2:20.2 View workout
11/06/09 25:05 5,392m 2:19.5 View workout
11/04/09 25:07 5,312m 2:21.8 View workout
11/03/09 26:36 5,685m 2:20.4 View workout
11/02/09 26:18 5,520m 2:23.0 View workout
11/01/09 32:24 7,023m 2:18.4 View workout
10/31/09 30:55 6,579m 2:21.0 View workout
10/30/09 26:19 5,518m 2:23.0 View workout
10/28/09 v1:40/0:20r...9 3,655m 2:03.1 View workout
10/26/09 30:18 6,323m 2:23.7 View workout
10/24/09 30:37 6,298m 2:25.8 View workout
10/23/09 20:26 4,522m 2:15.5 View workout
10/20/09 20:08 4,145m 2:25.7 View workout
10/19/09 11:38 2,521m 2:18.4 View workout
10/17/09 11:05 2,584m 2:08.7 View workout
10/14/09 25:49 5,579m 2:18.8 View workout
10/02/09 21:07 4,520m 2:20.1 View workout
10/01/09 30:06 6,348m 2:22.2 View workout
09/29/09 4x750m/1:00r 12:15.8 2:02.6 View workout
09/28/09 23:47 5,022m 2:22.1 View workout
09/27/09 33:51 7,097m 2:23.0 View workout