Yeah I’d use hrTSS. I used to row but now only sit on an erg once or twice a year and my arms and core/posterior chain are definitely the limiters. Also rowing engages far more muscle groups than cycling so typically hr is higher for rowing than for cycling at any given RPE, so whatever you use you would want to base it off some baseline threshold test. I see no reason why a 20 min test wouldn’t get you in the correct ballpark.
Yeah I’d use hrTSS. I used to row but now only sit on an erg once or twice a year and my arms and core/posterior chain are definitely the limiters. Also rowing engages far more muscle groups than cycling so typically hr is higher for rowing than for cycling at any given RPE, so whatever you use you would want to base it off some baseline threshold test. I see no reason why a 20 min test wouldn’t get you in the correct ballpark.