Hopefully a few could help a brother out. Started working out a few months ago, but had to take a rest, due to a knee injury.

Slowly building up my routine by attempting the "300" workout after a long break.

Any one know a bodyweight workout which substitutes inverted chinups?

Seen around 01:15 in the video

https://www.youtube.com/watch?v=MABMQy8CCNc