EpicriderGMAC said:At least for base training, that is....
I've found that after my FTP went up this past season, its taking longer and longer rides to rack up TSS scores to compare to last season! In order to get a base miles ride in of 4-5 hours and 250 TSS, I now need a NP of over 280 watts to get this. It gets hard, in the course of a ride like that I burn over 4500 KJ, and bonking is a real issue unless I eat a lot of gycogen every hour.
I'm just wondering--I've put in up to 24 hour weeks already with IF rides of .65-.76. My TSS has yet to break 1000 this season.
So in general--is it harder to rack up TSS with a higer-than-normal FTP while training?
Two thoughts/comments:
1) Have you considered the possiblity that you were underestimating your functional threshold power before, and/or overestimating it now? Even if both estimates are in the right ballpark, if you were 'lowballing' it before and/or 'highballing it' now, it will be harder to generate a high TSS (especially since IF, which is the ratio of normalized power to functional threshold power, is squared in the calculation).
2) Certainly, the greater the training load the higher one's carbohydrate intake must be. Given that you're training up to 24 h/wk (albeit at a moderate intensity), you should be consuming at least 8 g of CHO/kg body mass/day, and possibly even more.