Tricky to say. Monthwise there has been a bit of a downward trend in TSS:
- 1616 month 1 (med volume)
- 1552 month 2 (med volume)
- 758 month 3 (med volume, lots of skiing here)
- 1376 month 4 (low volume)
That would explain why I got a minor FTP drop after month 3, but doesn’t really explain an even larger drop after month 4.