View the prototype here:

All workout category icons featured in the home screen from Andre Buand via the Noun Project (CC BY 3.0)

https://thenounproject.com/browse/icons/term/punching-bag/

https://thenounproject.com/browse/icons/term/pilates/

https://thenounproject.com/browse/icons/term/mat/

https://thenounproject.com/browse/icons/term/kettlebell/