Why are the knuckle push-ups made with vertical position of the hands, aren't they emulating punches (which in most cases are taught horizontal)? - Quora
Knuckle Push-Ups: Benefits, Muscles Used, and More - Inspire US
Knuckle Push-Ups vs. Regular Push-Ups | livestrong
Knuckle Push-Ups vs. Regular Push-Ups | livestrong
What is harder, regular push-ups or knuckle push-ups? - Quora
Knuckle Push-Ups: Benefits, Muscles Used, and More - Inspire US
Knuckle Push Ups - Why They SUCK | What You SHOULD Do Instead!
How to Do Knuckle Push-Ups: Muscles Benefits, and Drawbacks – Fitness Volt