I'm a 31yo male, and after almost a decade without exercising even the slightest I got back into fitness last spring via my local Crossfit box. I progressively added more and more training volume and I joined a coastal rowing club in september, I did my first 2k in december and achieved 6:57 in lightweight category. Since then I also did a decent Hyrox Solo Open race in 1h21, and we got 12th place in France National Coastal Championship in 4x. I'm progressively getting fitter, gained some lean weight (currently 80kg for 1.83m ; that's 180lb and 6'0), and having lots of fun training !
Currently, my weekly regimen of training consists of 3 high intensity Crossfit WODs, 2 hours of strength work, 1 rowing session on the water, and I recently added some 1h zone 2 erg 2-3 times a week in the morning to make a more polarized training routine.
Those easy sessions are reaaaaally slow, about 2:25/500m r18, aiming for about 140bpm (max heart rate measured at 203bpm) with a RPE of 2-3 and a good talk test. Using 50% of my 2k wattage, I "should" pull something closer to 2:10/500m but I will surely get in zone 3 training at this speed. My z2 running speed is pretty slow as well, about 8min/km and still easy as hell.
I'm a bit surprised by those low numbers because I thought my aerobic base was clearly better, being more of a cardio guy than a pure lifter, and thriving more on long efforts like Hyrox and 6k than on short explosive workout or even 2k. Technique is seemingly fine though so I don't think the problem comes from there. I don't monitor my HR on boat, and do my UT2 sessions on feelings, and they don't feel as slow and the boat is going pretty ok speedwise.
I'm worried those erg sessions might not be as effective as they should be, and I'm a bit lost on which intensity to target during those steady state sessions, and I get very different ranges depending on where I find the info :
- 60-70% max heart rate : 122 - 142bpm
60-70% heart rate reserve (Karvonen) : 137 - 154bpm
Free spirits rowing UT2 : 129 - 154bpm
Aviron France ramp test : 152 - 162bpm (which uses a 75-80% of MHR calc and might get closer to UT2 than Zone 2)
Should I keep on doing really low intensity work and trust the zone 2 process for some more months, or shift to a more UT2 approach and add some more intensity to aim for slightly higher heart rates (which I'm a bit afraid of considering the metabolic load I already have due to Crossfit) ?
I'm fully aware that this prog is not optimal at all and not specialized enough to either join national rowing team, participate in the Crossfit Games, or qualify in the Hyrox E15. It's a compromized between the schedule of the box, my own work hours (and rest periods), me living 1h away from the boat club, and the fun I want to have.
Thank you very much !