Hi Cyclists.
I have been keto for almost a year now and more recently, I’ve incorporated a lot of extended fasting. I noticed since I started doing more fasting that my power output is going way down. I’ve tried riding both fueled up (eggs/bacon pre-ride) and fasted (18 hours). In both cases, both my power output and speed are much lower than before I started doing extended fasting. I know that fasting is supposed to be muscle sparing, but I’m wondering if I’m doing more harm than good when it comes to athletic performance.
For those of you who don’t know me, I started doing extended fasting because I wasn’t losing any weight with keto. Weirdly, I’m about 5-6lbs lighter now…so I’d expect to be faster, but I’m much much slower and my power output went from 115-130 to 90-99.
Energy wise, I’m on fine while riding, I’m just sloooow and apparently, not powerful. My heart rate is definitely trending higher since going keto (and maybe even a little higher since all the fasting). I will chart out my trends in HR, power, and speed over the weekend to see if I can find some patterns…but right now, it just seems like I’m losing fitness.
As a side bar, I’ve also noticed that my strength in the gym is lessening as well.