# Get My Head Around TSS, IF, NP etc **URL:** \ **Category:** Training\ **Created:** [March 22, 2020, 12:04pm UTC](https://www.trainerroad.com/forum/t/get-my-head-around-tss-if-np-etc/31859 "2020-03-22T12:04:08Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![mcneese.chad](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/mcneese.chad/32/15056_2.png) [@mcneese.chad](https://www.trainerroad.com/forum/u/mcneese.chad)\ **Post date:** [March 22, 2020, 3:40pm UTC](https://www.trainerroad.com/forum/t/get-my-head-around-tss-if-np-etc/31859/4 "2020-03-22T15:40:25Z")
Sure, same tools, but there are many other variables here. > [@Indoor Vs Outdoor FTP](https://www.trainerroad.com/forum/t/indoor-vs-outdoor-ftp/1914): > > Hi guys, Does anyone find a big discrepency with their indoor vs outdoor ftp? I did a 40km ITT a few weeks ago and held an average of 290 Watts for 1:03hrs. Theoretically this gives me an FTP of 290W (maximum sustainable power for 1 hour). However, when training indoors I find it difficult to hold 240W for a 10 min interval (I did the ramp test today and scored 238W). Both indoor and outdoor were measured on the same powermeter (Powertap P1 pedals), and both were done holding the TT position f… > **[Adjusting Your Functional Threshold Power for Indoor Riding | TrainingPeaks](https://www.trainingpeaks.com/blog/adjusting-your-functional-threshold-power-for-indoor-riding/)** > > As cyclists and triathletes are forced onto their trainers during the winter, many wonder why they cannot produce the same power indoors as they can outdoors. Expert power coach Hunter Allen outlines the various factors that come into play and offers... > **[Indoor Cycling Power vs. Outdoor Power: Know the Difference](https://www.wahoofitness.com/blog/ask-experts-indoor-cycling-power-vs-outdoor-power/)** > > If you try to take your indoor cycling power zones outside or vice versa without knowing the difference, your workouts will be either impossibly difficult or wastefully easy, neither ideal. --- _[View the full topic](https://www.trainerroad.com/forum/t/get-my-head-around-tss-if-np-etc/31859)._