mjac
Joined 16 years ago
Karma
35
Submissions
25
Member since
Jul 15
Recent submissions
Comment · 2 years ago
Thank you! Native apps not released yet but you are welcome to try the web app at my.strengthlevel.com
Comment · 2 years ago
I'm working on a workout API and native apps (iOS/Android) for Strength Level [1] as another interface for my.strengthlevel.com [2]. Strength Level helps you understand your relative strength - how strong you are for your bodyweight.
Using PHP Slim Framework, MySQL, and vanilla Swift/Java. Prioritizing reliability and efficient sync between local storage and server. Currently finalizing API endpoints and feature matching the web app. Next up is adding a subscription model.
It's challenging as:
- Users want to use the app offline which means we need to sync
- We have to match our existing features on [2] in the first version and evolve the API and database to support reliable sync
- Users want to also track their cardio too e.g. Running Level [3] and Rowing Level [4] but that will have to come out in a future version
[1] https://strengthlevel.com/
Comment · 4 years ago
The Faber Book of Science by John Carey
I’m a professional HN lurker but I can’t not contribute this one. The book all scientists should have read and would love, but haven’t heard about…
“The editor of the internationally acclaimed Eyewitness to History now charts the development of modern science. In this first anthology of its kind, Carey chooses accounts by scientists themselves--astronomers and physicists, biologists, chemists, psychologists--that are both arrestingly written and clear. Contributors include Carl Sagan, Charles Darwin, Stephen Jay Gould, Oliver Sacks, Lewis Thomas, Rachel Carson, Sigmund Freud, Henry David Thoreau, Mark Twain, and scores of others.”
Hope you enjoy!
Comment · 5 years ago
Thank you for the encouragement! Did you find any areas to improve?
The seed standards reference data is mainly from publicly available race data in CSV form and common running formulas used in the industry (e.g. Effective VO2 Max / VDOT). There are plenty of online calculators and literature (mostly based on Jack Daniels' Formula). However this is just a baseline and it'll be based on its own data set in the future (e.g. survey input).
Some links: Brian Mac - https://www.brianmac.co.uk/vo2max.htm Age grade tables - https://github.com/AlanLyttonJones/Age-Grade-Tables Jack Daniels' Running Formula - https://runsmartproject.com/calculator/ (and related book)
Comment · 5 years ago
I built Running Level https://runninglevel.com/ recently along the same lines as my other site Strength Level https://strengthlevel.com/ but have only done a soft launch. Gyms are closed here in the UK so a lot of us are out running instead.
Running Level has running standards for your age/gender over many distances like 10k/marathon/mile. The calculator on the homepage helps you rate your running performance against other people your age/gender, predicts race performance and recommends some training times.
I was hoping to do a Show HN or Product Hunt but marketing has never been my strong suit. Hope someone likes it!
Comment · 11 years ago
We would love to provide that kind of guidance. By training age, do you mean age of user?
Comment · 11 years ago
Yes, so we have to say you are better than 75% of other users instead of 75% of humans. Do you have any advice in this area?
Comment · 11 years ago
Understood, thanks for the explanation.
Comment · 11 years ago
We really appreciate the positive feedback.
Good point with the back button. The original page was made in 2007 and the full page form submission could be refined to use an AJAX post.
Would it be possible to explain "you could remove the last result when an item is deleted from the page" a little further? Do you mean resetting the page back to its initial state?
Comment · 11 years ago
Originally http://www.exrx.net/Testing/WeightLifting/StrengthStandards.... (Starting Strength tables) but later refined with 500k+ user results.
What were you expecting to see? Could you explain further?
Comment · 11 years ago
Yes, you are exactly right about the original source data. However, Strength Level has been around since 2007 and we use 500k+ user lifts to refine the estimations.
Comment · 11 years ago
Thanks for the positive feedback. It would be great to monetize Strength Level, to fund further development and expand its capabilities. We have two ideas at the moment:
1. iPhone app - people want to rate lifts at the gym
2. Premium accounts - see workouts older than 6 months/personalised recommendations
Comment · 12 years ago
The source code is very well commented, a high quality piece of engineering.