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
01/02/24 20:00 4,357m 2:17.7 View workout
12/31/23 35:00 7,223m 2:25.3 View workout
12/24/23 6000m 28:18.9 2:21.5 View workout
12/23/23 3000m 13:37.3 2:16.2 View workout
12/22/23 30:00 6,230m 2:24.4 View workout
12/21/23 30:00 6,010m 2:29.7 View workout
12/20/23 40:00 7,969m 2:30.5 View workout
12/19/23 15:56.6 3,271m 2:26.2 View workout
12/17/23 10000m 49:12.4 2:27.6 View workout
12/16/23 5000m 24:02.5 2:24.2 View workout
12/15/23 15:00 3,158m 2:22.4 View workout
12/14/23 20:00 4,245m 2:21.3 View workout
12/03/23 10000m 52:50.7 2:38.5 View workout
11/29/23 20:00 4,048m 2:28.2 View workout
11/26/23 10000m 50:24.6 2:31.2 View workout
11/25/23 10549m 54:17.3 2:34.3 View workout
11/24/23 1500m 7:02.0 2:20.6 View workout
11/24/23 v0:45/0:45r...19 3,511m 2:08.1 View workout
11/23/23 10000m 50:29.5 2:31.4 View workout
11/22/23 20:00 4,349m 2:17.9 View workout
11/19/23 30:00 6,092m 2:27.7 View workout
11/17/23 20:44 4,043m 2:33.9

30 Minutes

View workout
11/15/23 30:00 6,122m 2:27.0 View workout
11/14/23 15:00 3,273m 2:17.4 View workout
11/12/23 45:00 8,835m 2:32.8 View workout