Came here to post something similar but far less eloquent or well structured. It reads like long-form copy designed to get you click through to buy things you don't need.

If HNers want to build strength they need to look at their surroundings, their patterns and see whats achievable in their day. Buying machines won't help you get fitter or stronger, doing the right routine that fits in with your life will. Until I fell ill I was doing bodyweight-based calisthenics, which worked well for me as it was less than 15 minutes a day and could mostly be done anywhere. I'm hoping to go back after a bit of a longer break.