I'm curious about your resting HR and your max HR. Have you measured/tested these lately, and are they any different from what you recall they were years ago? (My guess is that the resting HR is probably lower by 5-10 bpm, and the max HR is about the same, but you can do more work in that max effort.)
my resting hr in the morning is currently 50 - 52. in the last 5 weeks I really upped my rowing, averaging two 10km on almost any day. I remember, that my resting hr got to mid 40, sometimes even lower, later in Al's "lazy endurance" swing protocols. There I swung 5okg for 5reps EMOM, varying volume four times a week 2x6 weeks with SSST and 10min running test in the beginning of the protocol, then after the protocol and lastly after the second round. Interesting is that during the last week my blood pressure seems to go down the upper figure goes from around 130 to around 110.
With the EMOM schedule my hr peaks rose over the length of a session, as recovery with the bell I used was slightly incomplete. My max heart rates were quite a bit higher than my usual peaks with A+A for the last year or so. I remember resting hr @ mid 40 when I rode my racing bike frequently from spring to autumn 20-10 years ago, as I rode very hilly terrain with lots of up and down. The same goes the heart rate.
With my aerobic work around the thumb I average 125 on the rower, around 133 while running. My A+A work my max goes around 140bpm.
Would be interesting, what kind of stimulus is needed for decreasing RHR.
@Bret S. made some great observations and experience with his VWC endeavour.
@Anna C experienced low RHR with time on the bike, as I did. The first question would be, what is the main driver for low RHR? the first thing that comes to my mind is a greater heart chamber, that ejects more blood with each beat. With my oversimple presumption I would guess, the heart needs some accumulated time where it expands and ejects it's maximal blood volume. I would guess, that any individual has with each endurance activity a kind of sweet spot where this occurs. Then higher heart rates are just higher heart rates with no additional expending of the heart chamber(s).
Harald I was wondering about doing rowing and snatches the same day, obviously it's no problem for you now but in the beginning, that is when you first started rowing, was it hard for the lower back muscles to handle?
My rowing technique seems to be back friendly I have a cadence of around 35 strokes, which is quite high I think. My torso stays erect the whole time, when I film myself, my lower back stays flat (I can goblet squat deeply with very narrow foot positioning). in the end of the stroke there is almost no back lean. And I mostly row in low heart rates. A 2000m test my technique may look different.
It could be that the rower is "the" cardio tool with some occasional running to be getting a bit of an impact with each stride. I am musing and reading a bit on it. The infamous VO2max seems to be kind of important measure for elite rowers. I read somewhere these days, that in 8 men team rowing the crew with the highest average VO2max usually is the the leading team. A rowing event lasts say 7 minutes of almost all out rowing. The blue print rower may be 200cm weighing 100kg. They need almost the maximal mass of muscle, that can be provided with oxygen, while handling a lot of the cruel stuff in the system. High body mass is not a problem for them, as their body and boat is carried by the water.
When looking at a runner in an around 7 min event let's say 3000m obstacle or 1500-5000m runners are more concerned at a higher relative VO2max in relation to their bodyweight as they are fighting big time gravity with each stride. But the runner with the highest relative VOmax must not be the winner, as it is more as very rough pointer.
Another thing is heart adaptation of rowers. With each stroke they put out really high power, and through the valsalva maneuver and isometric stiffening of the torso and resistance on a pull, the blood pressure rises really high. that leads to heart wall thickening, but through the dynamic nature and little eccentric work blood can flow through the system and back to the heart to fill the chambers maximally, thus expanding of the chambers occur. So the hart walls thicken, and the chambers get bigger and sty pliable. Should be a set up for a happy heart.
Secondly I'm interested in rowing but don't want to shell out $900.00 dollars for a C2 right now. I remember somebody on the forum recommending a less expensive rower that had good reviews. The used C2's still go for quite a bit and are bought up quickly around Southern California. Having said that I may consider buying a C2 anyway, the thing stopping me is a coming change in my training location in Dec 2019, if need be I could sell it and re-buy later.
The concept 2 is great I am happily using it. Imagine you with Buddy Guy on the rower...