Just adding more data to the thread.
I haven’t been on my trainer for a while, so I decided to perform a little lactate testing to see where threshold is. Rather than doing a graded test, I decided to try something different. With some guidance from CP as my upper limit, I started at about 95% of CP for 15 minutes, then I rode at CP for another 15 minutes, and based on feeling (and lactate measurements), I backed down another few watts and rode for 30 minutes to see if lactate would stabilize.
I ended up riding an average of 100% MLSS (or FTP or CP) for an hour. It wasn’t that hard and I could have gone another 10-15% longer if I had the motivation. The ache in my chest was annoyingly noticeable the last 10 minutes of the effort.
I’d round my threshold estimated to about 220 for use.
| Threshold | Source | Power | W/kg | W’/FRC |
|---|---|---|---|---|
| CP | GC (ExtCP) | 219 | 2.64 | 19.9 |
| FTP | WKO (??) | 222 | 2.67 | 15.2 |
| MLSS | Lactate | 217 | 2.61 | N/A |
| Sample | Elapsed | Feeling? | Interval | Bla | Power | HR | %MLSS |
|---|---|---|---|---|---|---|---|
| 1 | 0 | Not Motivated | 0 | 1.4 | 0 | – | - |
| 2 | 10 | Easy | 10 | 1.3 | 125 | 114 | 58% |
| 3 | 20 | Easy | 10 | 1.2 | 125 | 114 | 58% |
| 4 | 27 | Warming Up | 7 | 2.7 | 210 | 139 | 97% |
| 5 | 35 | Almost There | 8 | 3.0 | 210 | 145 | 97% |
| 6 | 42 | Too High | 7 | 4.0 | 222 | 149 | 102% |
| 7 | 50 | Too High | 8 | 4.8 | 222 | 152 | 102% |
| 8 | 60 | Just Right | 10 | 4.7 | 217 | 152 | 100% |
| 9 | 70 | Just Right | 10 | 4.5 | 217 | 152 | 100% |
| 10 | 80 | Just Right/Done | 10 | 4.7 | 217 | 152 | 100% |