Our earlier experiment with proof-of-workout worked! Hundreds of people exercised and sent in their proofs, and one hundred of the best were selected and got paid $10 in Bitcoin each. Below are some notes on the process, plus a new proof-of-workout task with $1000 in $10 prizes for screenshots of fitness dashboards.
Proof-of-workout via photos
Many submitted private proof-of-workouts, but plenty posted public workout shots to inspire others. Here are some of the best healthies (healthy selfies) which were shared publicly:


















Proof-of-workout via fitness dashboards
Healthies are great, and motivating. But we may want to accompany them with quantitative data.
That gets us to the second large class of proof-of-workout proofs: namely, screenshots of various fitness dashboards. These are particularly interesting as they could be the foundation for a more private, cryptographically verifiable proof-of-workout. Specifically, a true proof-of-workout might involve realtime data feeds from a Fitbit or Tonal that are cryptographically time-stamped entries in the ledger of record. For now, screenshots are fine as a first approximation!
We received as many screenshots as we did healthies, and many of the selected winners submitted both in tandem. Here are some of the best publicly shared screenshots:


















Back by popular demand
The theoretical reason to do proof-of-workout is that microincentives can help change behavior. The philosophical reason is that fitness tracking and quantified self are the first steps towards transhumanism, and because staying fit today is on a straight line with reversing aging tomorrow.
But the practical reason is that all of you loved it. So many of you asked to see the proof of workout task again, so here it is - this time a bit more focused on fitness dashboards.
β Task: Earn $10 in BTC for a fitness dashboard screenshot
Submit a screenshot from a fitness dashboard for a proof-of-workout
For this second proof of workout, we ask you to specifically to submit a screenshot from a fitness dashboard (from something like Fitbit, Tonal, Apple Watch, Peloton, Strava, or the like) for a workout completed after this post was first published. You can also include a healthie (healthy selfie) alongside. We ask that you include in the form submission the URL of the app or product you use to prove your workout, and to do your best to make this evident in the screenshot.
From your submissions, we will be able to see which fitness products are the most popular within our community, and we may even look to collaborate with a few in the future for new fitness tasks for the whole 1729 community.

π Winners: Best Proof-of-Workout
One hundred submissions received $10 in Bitcoin for their Proof-of-Workout. Check out some of the public submissions below!
VR gaming πͺπͺπͺ pic.twitter.com/Hy5RNflXO4
— Yedat (@yedat_yeesh) April 23, 2021
— Hiro Protagonist (@metaversesherpa) April 23, 2021
Proof of Workouthttps://t.co/5tD4DQWeAQ pic.twitter.com/gtO5a9nzHv
— Andrew π (@andrewjiang) April 23, 2021
Proof of work. Woke up at 4:45. Got to the gym at 5:15. HIIT and weights. Every other day, since 2011.
— Siu David (@siudavid_) April 23, 2021
Used @IntervalsPro on my Apple Watch. @oneseventwonine pic.twitter.com/kTkkanDL9a
If you haven't realized it yet. The future of workouts is largely in VR expereinces. pic.twitter.com/S4CvlzEyXB
— nejc 'NJ' skoberne (@howdoyousaynejc) April 23, 2021
Proof of workout pic.twitter.com/wTctVnYm02
— MARKUS MULLER (@markusmuller100) April 23, 2021
Proof-of-workout pic.twitter.com/LdM0U0VSO6
— Andrew Xu (@andrewxu) April 23, 2021
Been off of running for a while and recently got back to it. Short, intense runs in the morning are a game changer. @oneseventwonine pic.twitter.com/gv57ooeUVS
— rmeinl.com (@rmeinl) April 23, 2021
Went for a 4.8 kilometer run, according to Strava. The location tracking shows a pretty erratic path compared to what it actually was.https://t.co/1iZnOmccCS
— Mark (@logicmason) April 23, 2021
First time using the app, though. Before, I was on voomaxer. pic.twitter.com/TvRiNrQasY
Proof-of-Workout
— Biotredsπ (@Biotreds) April 23, 2021
Remember why you started #Biotredsπ±
@oneseventwonine #PoW
Check out my activity on Strava: https://t.co/hgq6QBSYFC pic.twitter.com/VEYkqw9x73
Crossfit morning 23/04/2021 pic.twitter.com/qi3D6xvWgS
— Benedikt David (@laplace2508) April 23, 2021
Some running before coding π₯΅ pic.twitter.com/Vr3Vce0AUe
— TheC0d1ngPascal (@TheCodingPascal) April 23, 2021
Proof of Workout! pic.twitter.com/hX3M0qnekl
— Freddy Turriaf (@fturriaf) April 23, 2021
POW (Proof of Workout) for @oneseventwonine pic.twitter.com/SyUa2wXdVJ
— Michael Young (@Miyou) April 23, 2021
This morningβs #proofofworkout pic.twitter.com/v9fJwnjYWd
— Lilly Sharples (@lillysharples) April 23, 2021
@oneseventwonine a little urban #POW pic.twitter.com/lcK3X4t6Qn
— John Purcell (@JohnPurcell_) April 23, 2021
Found my new workout challenge!! #PelotonNewbie pic.twitter.com/mgGV0rVjLq
— Minsoo Go (@minsoo_go) April 23, 2021
Hydrow fitness dashboard and healthy selfie for 1729! pic.twitter.com/CFpnsyjqwa
— Courtney Orsinelli (@courtneyorsinel) April 23, 2021
It was very windy but kids managed :) https://t.co/JtHmdLbcb9 pic.twitter.com/v4WFDgFlfT
— Peter Lebedev (@PeteLebedev) April 23, 2021
— Djordje (@tajo990) April 23, 2021
Good run today! pic.twitter.com/cxBcMwT2HL
— Jennifer Smith (@JRSinTucson) April 23, 2021
Just finished a 5K hike with a 13.5 kg pack (part of my early training for the Nijmegen International 4 Days March) and it's my entry in a "fitness challenge" on https://t.co/ki66githyK to win some #Bitcoin!! My Oura ring says my exertion was "medium" but my quads say "high!" π pic.twitter.com/BPeR0bTeZo
— Edward H. Carpenter (@E_H_Carpenter) April 23, 2021
#proofofworkout pic.twitter.com/HCgcXBbpO9
— Richard β‘οΈ (@Overtino) April 24, 2021
Did a bit of a workout this morning, went a bit harder than I intended. pic.twitter.com/hMkg5hLfip
— Barend Burger (@baldy_za) April 24, 2021
@oneseventwonine happy to get it in after a long workday! ππͺππ»ββοΈ pic.twitter.com/F0cTT7R8bK
— Theresa (@Theresa11003675) April 24, 2021
https://t.co/YF6xp9du2A pic.twitter.com/D8PNi71jsD
— Allan Newburn (@allannewburn) April 24, 2021
Dashboard, date and hiking pic πΌοΈ @oneseventwonine pic.twitter.com/R7nufHhfbe
— marsella.eth (@ant_marsella) April 24, 2021
POW (Proof of Workout) pic.twitter.com/6nO701RBOV
— Viktor Kyosev (@viktor_kyosev) April 25, 2021
Proof of Workout pic.twitter.com/Wife3sXZFW
— satwik rajani (@satwik93) April 25, 2021
Casual Half. pic.twitter.com/rQHfqnskpr
— Aaron Lawler (@lil_lawler) April 25, 2021
Little bike trip around Barje pic.twitter.com/POmgk4Simj
— Jaka K (@katrasnikj) April 25, 2021
Sunday-Singlespeed-Graveln zum Gehspitzweiher π€ pic.twitter.com/H7nxlaJLIH
— Daniel Horn (@leinadhorn) April 25, 2021
Messing around with @oneseventwonine βs proof-of-workout. pic.twitter.com/jNneIdLpoN
— Raman Ohri (@ramanohri) April 27, 2021
Hitting my @1729 task for proof of workout.
— ModernThoughts (@ModernThoughts6) April 27, 2021
2x brain cancer survivor so I'm pretty proud of this one πͺ pic.twitter.com/f7Llxl9ZP5
Perfect morning for a paddle. @oneseventwonine #proof-of-workout pic.twitter.com/RmQGp2bUWL
— jonfauver (@jonfauver) April 27, 2021
@oneseventwonine POW pic.twitter.com/e1W1wQQzpO
— Amaya (@AmayaKothari) April 27, 2021
— Victor Goizueta (@WeirdVic) April 28, 2021
— David (@nooginowski) April 28, 2021
Evening Run with @Nike Run Club!#nikerunclub
— Anay (@anaydeshpande_) April 29, 2021
POW (Proof of Workout) for @oneseventwonine pic.twitter.com/0L5EyLSbA1
#FirstRunFromAges #FeelingStrong pic.twitter.com/r4Osc8jm1g
— Danail Dimov (@DanailDimov4) April 29, 2021
@oneseventwonine Proof-of-Workout! Love these tasks @balajis
— quasicypher (@quasicypher1) April 29, 2021
I've included my workout that I tracked within @strongapp and a PR that I got in snatching. #300lbs pic.twitter.com/Wi5nTLG0v6
Fun task, @oneseventwonine! Here's my dashboard after yesterday's workout in @getsupernatural. Did you get many VR-native submissions, @balajis?
— Garden Boy (@the____garden) April 30, 2021
Excitement mounts. pic.twitter.com/NXyQOV0Mct