I am going to speak candidly about the physical toll of this industry. If you spend enough years wrestling a gasoline or diesel jumping jack, your body keeps the score. In the early days, these machines were essentially rigid steel poles connected to an engine; every ounce of that 1,500 kg impact force traveled straight up the handle, into your hands, up your forearms, and into your shoulders. The result of that prolonged exposure is Hand-Arm Vibration Syndrome (HAVS), commonly known on the grade as "white finger." It causes irreversible nerve damage, blood vessel constriction, and a permanent loss of grip strength.
Thankfully, modern engineering has finally prioritized the human element. Today’s premium commercial rammers are built with highly sophisticated vibration-isolation systems. The upper operating handle is completely decoupled from the main striking mechanism, connected only by heavy-duty, multi-stage rubber shock mounts. These rubber blocks absorb the vast majority of the harmonic resonance before it ever reaches the operator's gloves.
However, technology only goes so far; technique is the other half of the battle. I constantly have to yell at "greenhorns" who try to muscle the machine with a death grip, locking their elbows out. A properly tuned rammer is designed to advance itself forward a few millimeters with every strike. The correct technique is a light, relaxed grip. You keep your elbows bent, using your hands only to balance the unit and gently guide it left or right. You let the machine’s weight do the work. Protecting your joints is just as important as hitting your compaction numbers, because a machine can be replaced, but your hands cannot.
