If you have navigated to implementations then you are looking at purchasing high quality gardening hand tools. Each tool is manufactured and designed so that it is more efficient when working resulting in being able to do more but at the same time reduce the stresses placed on the body. This stress is often the cause of pain particularly lower back. Pain from gardening is something that takes the pleasure out of something that you take great pleasure from.
Why, because tools such as the Atlas Pick are ergonomically designed better for their particular purpose. They rely on a swing action with gravity to assist. The long shafts improve efficiency of the tool with added leverage whilst working in an upright posture. Next a pulling action using again the upper body. It is a natural fluid motion. The bronze heads and shaped ash handles are forgiving and absorb energy when working.
In contrast consider using a spade. One uses body weight to penetrate the soil, this places more loading of the spine on the left or right side which can expose back issues. Then one levers away from the body often lifting the soil at the same time. This motion is not fluid or natural and places greater strain on the lower back, this is made worse by the short shaft which necessitates one to bend the back. The back is vulnerable when loading whilst bent but add a little rotation whilst bending over and one increases this vulnerability further.
One has to use the PKS bronze tool in a different way to the conventional British tools but when one has mastered its correct use you will wonder why the tools developed for gardening use in the UK ever became the standard. It does not make sense to continue using tools that take more energy to use and can cause pain and injury.
Why use tools that can reduce the pleasure you get out of something you love. Buying a gravity-assisted tool will not be a decision that you will regret.