Concept2

thumb|The headquarters of Concept2 in Morrisville, Vermont thumb|A line of Concept2 "Model C" indoor rowing machines Concept2, Inc. is an American manufacturer of rowing equipment and exercise machines based in Morrisville, Vermont. It is best known for its air resistance indoor rowing machines. Considered the standard training and testing machines for competition rowers, they are often found in gyms, boathouses, elite training centers, and cardiac rehab and physical therapy facilities.

Competitive events using Concept2 Ergs include the World Rowing Indoor Championships, HYROX competitions , the British Rowing Indoor Championships competitions, and historic CrossFit Games events (including the CrossFit Open and qualifiers). Concept2 also manufactures oars for sculling and sweep rowing, as well as three other flywheel-based exercise machines: the SkiErg, the BikeErg for cycling, and the StrengthErg for strength training.