Low Charge on Exercise Load in musculation

Yes, it is expected for the Garmin watch to underestimate the anaerobic contribution of activities outside running and biking. Strength training is essentially anaerobic, but the watch has no way to capture actual output. For running/biking, pace/power tells the watch helps the watch detect anaerobic effort even if the HR has not caught up yet. Without this output, the watch has to analyze the kinetics of HR and HRV changes, the repetitions, etc. to give anaerobic credit. This doesn't work well for strength training, or for any activity (rowing, rock climbing, etc.).

Therefore, your training load will be underestimated, and all related metrics training load, focus, readiness, recovery will be off.

Hello and thank you for your reply Etupes25 !

Ok that's why the load is higher on the shorter session where I took less rest time, so the heartbeats is higher. than the longest session.

No other watch, even from another brand, can estimate an approximate load? Even with manually entered repetition and weight data?
If not, do you know an another way to get a reliable training status between weight training and running? Maybe a connected ring?

Thanks a lot!

I didn't do the research to find a device better at measuring training load and that would integrate with the Garmin metrics. I doubt there is one. Maybe some app has some algorithm using your 1RM number to gauge how hard you went, but that "load" would be a standalone number.

I have seen some research that found some load equivalence between an aerobic benchmark run and a certain % or 1RM exercise. So the approach might be of interest to Garmin, and I suggested so. I am not holding my breath as this type of research validation and implementation could take years, even if they ever look at it.

Thanks again for your help Etupes25 :) 

in fact, i have just to wait about new metrics on Garmin watches. I have a good feeling about it because i read that forerunner 265 watch has some power integrated metrics for running. Maybe it's the beginning of what we want :) 

But for today, I just have to ignore the training status function on my watch, and look at my HRV status. I think it's the most reliable metric to know if it's a good idea to practice sport or rest today ^^

Do you use cardio band on swatch sensor? I've found my swatch sensor to calculate high average rate for hr resulting in quite good load approssimation. So a "sensor" bug in this scenario is the solution. With hr band the algorithm don't catch the hr spike well. With swatch the sensor mitigate spike resulting in fake long high hr average time. 

1358651 said:

I've found my swatch sensor to calculate high average rate for hr resulting in quite good load approssimation. So a "sensor" bug in this scenario is the solution. With hr band the algorithm don't catch the hr spike well.

You are right but this is a serependitous process: the wrist HR measures the HR wrong during your sets, gives you non-existent HR spikes which in turn gives you more load.

The chest strap is accurate.

The fact is that strength training is mostly anaerobic in nature. Very hard efforts and/or large muscle groups repeats will eventually get the HR in higher zones if the set is long enough. Typically though with ~8 reps, you will finish the set before the HR has the time to ramp up.

The problem here is that there is good anaerobic training effect model for strength. There is one for running and biking, but not for strength training.