Two Scales, Two Body Fat Readings: Which Do You Trust?
The same 634 mornings, two scales, 6 to 9 points apart on body fat. What the numbers are good for, and which app setting explains almost the whole gap.
Patrick Lehmann
· 7 min read
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Patrick Lehmann
Software Engineering & Product
BSc Computer Science (ZHAW) · Founder & CEO of obseed · 15+ years in software architecture and engineering · 5× middle-distance triathlon finisher (70.3)
Patrick is the founder and CEO of obseed, a software architect and a triathlete. He got back on the bike in 2018 and did his first triathlon a year later. Since then he has finished five middle-distance (70.3) races, with a best time of 5:00:50, plus 2:15:48 over the Olympic distance, 1:06:48 in the sprint and 1:39:41 in the half marathon. His coach is Fabian Kremser, who leads research and science at obseed.
Training brought the apps with it: at one point Patrick was using up to four at once, because each had its own clever features. None of them gave him the full picture. Then a bad accident left him with two broken hands. With time on his hands, he asked himself: how hard can it be to build this myself? That was the start of obseed.
For Patrick, data is more than a means to an end. "I don't like data. I love data," he says. He pairs that passion with more than 15 years of experience in software architecture and engineering, including frontend architecture roles at Migros, Scout24 and the University of St. Gallen. Since 2015 he has also run his own software company, Squibble. He studied computer science part-time at ZHAW (BSc).
On the obseed blog he writes about data integration, HRV and what becomes possible when you take training data seriously.
Patrick lives in Switzerland with his wife Klaudia and their three children.
16 Articles
Gained 1.6 kg Overnight? What Your Scale Is Not Telling You
I weigh myself on two scales every morning. After a poker night, both showed +1.6 kg. What in my data is noise, and when you can see the real direction.
Patrick Lehmann
· 6 min read
New Feature: Ask Claude About Your Training
I ask Claude and ChatGPT about my sleep, HRV and training. Now they also log tags and session details, once I confirm in obseed.
Patrick Lehmann
· 4 min read
New Feature: The Mountain That Never Happened
My watch went for a swim in a fountain and invented about 100 metres of climbing. obseed now corrects errors like this automatically, even in old sessions.
Patrick Lehmann
· 4 min read
New Feature: Not How Hot It Was, But When
obseed now breaks your session into five-minute slices and shows the temperature curve instead of a single average, with a heat load reading per slice.
Patrick Lehmann
· 4 min read
New Feature: Log the Fuel Behind Every Session
Attach real sport-nutrition products to each session and capture the exact carbs, sodium, caffeine, and calories you took in, next to what you burned.
Patrick Lehmann
· 3 min read
New Feature: Your Training and Sleep, Now in Your Calendar
obseed now offers a personal iCalendar feed: subscribe once to see your sessions, competitions, and sleep in Apple Calendar, Google Calendar, or Outlook.
Patrick Lehmann
· 2 min read
Weekly and Monthly Views: See the Pattern in Your Tags
Your daily tags now become visual heatmaps. obseed weekly and monthly views reveal supplement gaps, sickness arcs, and caffeine rhythms at a glance.
Patrick Lehmann
· 6 min read
Oura Tags in obseed: 91 Signals, Automatically Connected to Your Entire Stack
91 Oura tags flow automatically into obseed — correlating with Garmin, Whoop, Withings, and Wahoo. No double entry. No silos. Your full picture.
Patrick Lehmann
· 7 min read
The Best HRV Apps for Endurance Athletes (2026 Comparison)
Comparing HRV apps for runners, cyclists, and triathletes: how obseed, HRV4Training, Elite HRV, WHOOP, and Garmin Connect stack up on metrics and value.
Patrick Lehmann
· 13 min read
Garmin vs Oura vs WHOOP: Which Gives You Better Sleep Data?
Sleep tracking accuracy and metrics of Garmin, Oura Ring, and WHOOP compared. Which device gives endurance athletes the most useful sleep insights?
Patrick Lehmann
· 9 min read
How to Use HRV for Smarter Training Decisions
A practical guide to HRV-guided training: how to read your morning HRV, when to push hard vs rest, and how to avoid the most common mistakes.
Patrick Lehmann
· 8 min read
Your Nervous System, Decoded: HRV Analytics in obseed
60+ HRV metrics across 9 physiological categories from your wearable: Poincaré, DFA alpha-1, multiscale entropy, personal baseline, and 15-page reports.
Patrick Lehmann
· 9 min read
Beyond the Numbers: Universal Hierarchical Multi-Tagging in obseed
Your wearable measures everything — except the why. obseed Universal Tagging: 290+ tags across 10 categories, 6 time models, cross-device correlation.
Patrick Lehmann
· 7 min read
New Feature: Wahoo Integration – Your Cycling Workouts in obseed
obseed now integrates with Wahoo ELEMNT, KICKR, and BOLT — automatically syncing your cycling workouts, power zones, and FTP from full FIT file imports.
Patrick Lehmann
· 2 min read
New Feature: Withings Integration & Smarter Syncing
obseed now fully integrates with Withings scales, blood pressure monitors, and wearables, bringing a smarter, more resilient data sync experience.
Patrick Lehmann
· 2 min read