Part 1 of a 3 part series explaining the authors: Get Fit Through Gardening, aerobic gardening, dynamic gardening and now (2019) Power Gardening concept (available on Amazon Kindle)
The original books, are available from the author.

Aerobic/Power Gardening is a revolutionary update/change to a centuries-old hobby: gardening. Power Gardening is unlike anything you’ve experienced. It’s not just “digging in the dirt.” It’s a dramatic change in your attitude, approach, and stance while gardening. It takes an hour to learn and a a lifetime to master.