BlogHide Resteemskarletzel (33)in habits • 5 years agoOld dogs, new tricksI've lately been more conscious about the effort required to change deeply held beliefs, in particular the ones you hold about yourself. Being very cerebral I tend to fall back on data and facts…karletzel (33)in cycling • 5 years agoThe most underrated piece of cycling gearCycling pro tip of the day: I just wanted to highlight one of the most useful pieces of gear that I see almost noone else using, and that is the helmet cover: Your mom always told you to wear a…karletzel (33)in backpacking • 5 years agoKings Canyon NP, June 2019 tripEvery year I take the boys backpacking at least once, usually the high Sierras. This year we did not get to high (last year we made it to Glenn Pass). With all the snow pack the creeks and rivers…karletzel (33)in rogan • 6 years agoArt Imitating / Reflecting LifeAdding a little more random content to my seldom-updated blog for 2019. I've twice had the experience in the last 6 months of seeing something in media or popular culture which really resonates or…karletzel (33)in fasting • 6 years agoFasting and HRV, part IILest you think (as I did) that the first time was an anomaly or random: And with a second system / measurement device (this one more accurate - the Firstbeat Bodyguard used with their Lifestyle…karletzel (33)in fasting • 6 years agoFasting and HRVCan you guess which night I was 24 hours into a fast? 113 ms might be my highest HRV ever. I have begun extending my weekly fast to 36 hours (IOW I ate dinner Monday night and did not eat…karletzel (33)in cycling • 6 years agoFTP, Zwift, Shoulder workTraining binge over the holidays worked, did an FTP test on Zwift today (nothing magic to Zwift, it's a standard 20 minute protocol but Zwift has one pre-programmed with a really efficient warm-up…karletzel (33)in sleep • 6 years agoSleep tracker comparisonQuick note on a comparison I ran over the holidays on 4 (yes, 4 in parallel) sleep trackers: Oura, Firstbeat Lifestyle Assessment, Vital Scout, and the latest entrant, Beddr. Oura is a ring, Vital…karletzel (33)in cycling • 6 years agoDay 1 of a training blockFor a variety of reasons I have the week off to get some work done and I'm training a lot, my goal is 3 hours per day. The plan is 4 days doing 3 hour rides and then the other 3 days, ride 90…karletzel (33)in cycling • 6 years agoEnd of year bingeThe blog's been quite a while, life has been full. Started a new FT gig in a startup, scaled back a number of things, found some new devices I wanted to test, and working on building up the work…karletzel (33)in hrv • 6 years agoStress Analytics and Training LoadBeen tweaking the training up a bit lately and shortening my weekend rides, just getting too bogged down and tired on my long-ish loop to Page Mill. Rode last weekend with a pretty fast friend who…karletzel (33)in cycling • 6 years agoSome new carbon goodness, fall riding, prepped for winterWow been a long while, been super busy with a new FT gig in a medical device startup and my ex was outa town so I had a long stint in solo dad mode. Anyways...fall riding is gorgeous lately, I've…karletzel (33)in cycling • 6 years agoChill day up Hwy 9Nothing too dramatic today, I had a somewhat rough week in terms of just feeling super fatigued, so I took it a bit easier today: My time up Hwy 9 was about 2:30 slower than my time last week…karletzel (33)in cycling • 6 years agoNootropics for Athletic Performance - Day 1Two stories from my day today, one was just an overall very solid ride with a new PR on my local climb: I felt on the climb like I was going well, so I'm not too surprised by this. My Garmin…karletzel (33)in testosterone • 6 years agoTestosterone OptimizationQuick post about a very important topic - hormone optimization. You can't optimize what you don't measure. I use InsideTracker for all my blood work. Check them out: One of my projects of the…karletzel (33)in cycling • 6 years agoNew PRs, and VO2max intervals, and needing a restAfter my backpacking trip I had a super sluggish week, as I indicated last week. Then I did my usual Sunday loop (Highway 9 - Skyline - Page Mill - Foothill home) after a week or so of recovering…karletzel (33)in hrv • 6 years agoHRV Analysis of 6 days BackpackingFor this backpacking trip I wore the Firstbeat Bodyguard and ran the data through our Lifestyle Assessment ( Here are a few notes from the report. First up is the fact that my HR numbers clearly…karletzel (33)in cycling • 6 years agoSome Altitude workBeen a hectic start to summer, just back from the Sierras with my boys. Legs have been super sluggish - One of my local warm-up hills, a good 40 Watts less than I had been doing for a while…karletzel (33)in fitness • 7 years agoTraining update, fatigue vs. intensityHere's yesterday's ride from TrainingPeaks: One thing that I really notice after so many years away from racing is that hard efforts leave me really wasted. I had 3-4 efforts yesterday where I…karletzel (33)in cycling • 7 years agoVO2max, another small stepLoad up the training volume, things improve. Here's some background behind VO2max: If you don't know your score, and you are serious about fitness, you should.
