Sure his chest is on it, But, he is leaning into it.
His technique is fine for the Body sculpting ppl
If you look at when he is pushing at full extension - he is bent at the waist. If he can control that - eg, be nice and tall, then better.
However - I’m not a fan of having things to lean into things with your Torso. eg, the chest pad.
Part of the real strength that can occur, is learning to drive that foot backwards, and hold that force produced through your torso where your torso supports itself.
I have a machine that does what im trying to say - but, getting it recorded ATM isn’t gunna happen for a couple of weeks.
I hope this makes sense?
I personally believe there is a lot of difference between doing things supported like shown in this video, and non supported. I like the idea of the shoulders taking the weight, eg, like holding a barbell on your back, but it’s a solid non moving bar. If you’re weak in the supporting back muscles, you’ll crumble under load.
To note - you can be a bodybuilder and train purely on machines
- you don’t become the best athlete you can by training on machines (unless your injured… - but that’s a different story)