Went out quite hard and rowed 1:52.5, 1:53.9, 1:54.0 for the first 3 1k splits r.22 df 120 then settled into 1:56 r.21/22.But again overheated between 5-6k and paddled home at 1:58/1:59. May have to rethink doing longer ergs given heat issues.