Credits

Artwork and open work used in Apex Lane.

Muscle diagram

The front and back body diagram on each exercise page is based on “Muscles front and back” on Wikimedia Commons.

• Authors: OpenStax, Tomáš Kebert and umimeto.org (original drawing by OpenStax, redrawn and modified by Tomáš Kebert and umimeto.org).
• Licence: Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0).
• Changes made: the image was recoloured, split into individual muscles, and given highlight shading so it can show which muscles an exercise works. It is shared under the same licence.