That video is what you consider back-breaking? I planted ten trees on my property with a mattock & shovel over the course of two weeks, removing maybe fifty gal

That video is what you consider back-breaking? I planted ten trees on my property with a mattock & shovel over the course of two weeks, removing maybe fifty gallons of clay for each hole, and while it was hard I wouldn't describe it as back-breaking. You'd also adapt to it as you got stronger...