I have tried the recommended program by Garmin to build up to a MTB event and must say that I am quite disappointed in the program. Although I am 68 I am still quite fit and can race a MTB race of 70km's at an average speed of 26km/h.
Garmin put me on Base Training where it wants me to ride day in, day out at 120W. Doing this my HR does not even go beyond Z1 (Warm-up). Yet it still shows that my Training Status is "Strained". My FTP is 209W and LTHR is 136. My Max HR is 153.
After following the program for some weeks, I yesterday decided to do an outdoor ride with effort more towards Z4 (Anaerobic) 60% of the time and with the balance of time 36% in Z3 (Aerobic), and guess what,
Garmin showed my Training Status as "Productive". Goodness gracious, what laugh!!!
Strained at lower Watts than I would normally warm up at when riding on the trainer, but Productive when riding at good HR values.
-Warm-up f me would mostly be at 140W - 160W, with specific Watts and either Constant Load Increase over time or Intervals, or Sprints to follow depending on the specific training I do for the day.
Fat burning Z2 is mostly once a week.
I am wondering whether the Garmin program function is only for the super "unfit" or "beginners" as it definitely does not work for someone like me. I feel that it actually just breaks down the strength already existing, by keeping one at such low effort. Garmins recommended Watts for my is 120W and HR 90, where I only go into Z2 at around 92bpm. Z2 is then 92 - 106bpm.
One cannot train in a Warm-up zone day in day out.
Also my HRV worsened during this time and after only the one ride in Z3 and Z4 this value overnight increase from 33/34ms back up to 41ms.
I think Garmin needs to make an effort of understanding an individual's Max HR, THR and FTP power capabilities when recommending a training program leading up to a calendared event.
Quite irritating seeing your FTP falling when using the Garmin recommended training for an event you are working to.