Credits. Fettle is a demo: the studio, its coachesand prices are invented. These parts are real.

Photographs

All public domain (public domain mark or U.S. government works), via Openverse. Converted to paper-and-ink duotone for this site.

• Deadlift setup · “Barbell Black And White”, SPNFitness · source
• Hands on the bar · “Gym man workout black and white photo”, mulberrymedia25 · source
• Heavy bag · “GHWB Sailor Fitness”, U.S. Fleet Forces Command · source
• Kettlebells · “Yet another kettlebell”, Christos Pontikis · source
• Band stretch · “Crossfit 4”, U.S. Department of Veterans Affairs · source
• Plate press · “Crossfit 1”, U.S. Department of Veterans Affairs · source
• Group class · “Functional Fitness Training”, U.S. Army Europe · source

The traces

Every trace on the site is computed in code: a side-on skeleton with standard segment proportions (David A. Winter, Biomechanics and Motor Control of Human Movement) is moved through each lift, and the plate plots where the bar, bell or glove is over time, with a dot at a fixed interval the way Étienne-Jules Marey timed movement in the 1880s. Wide gaps between dots mean speed.

Type and icons

• Antonio, Vernon Adams · SIL Open Font License
• Reddit Sans and Reddit Mono, Reddit · SIL Open Font License
• Imbue, Tyler Finck · SIL Open Font License
• Anybody (the wordmark, outlined), Tyler Finck, Etcetera Type Co · SIL Open Font License
• Carbon icons, IBM · Apache 2.0

Facts

Training and place facts come from Wikipedia (CC BY-SA): Strength training, Squat, Deadlift, Kettlebell, Boxing, Sun Salutation, Holbeck, Round Foundry, Physical activity (WHO guidance).