Handle Path & Levels
On the erg, the handle (and chain) should travel in a STRAIGHT, level horizontal line to and from the flywheel — no dipping down or arcing up over your knees. A clean, level handle path means efficient force and a smooth stroke; a bouncing path wastes energy and usually signals a sequencing problem.
FilmableFilm this on your phone and TrueForm measures your body mechanics and tells you what to fix. You get angles, not a made-up score.