Force = mass*acceleration therefore although you lose mass you make up for it by having less inertia to overcome so the hammer accelerates faster allowing you to strike with the same force. It was spendy but I have a serious shoulder issue that was caused by having a tennis ball sized tumour removed about 5 years ago this issue causes problems up and down my arm and lighter hammers help this so hopefully it will be worth it.
Force = mass*acceleration therefore although you lose mass you make up for it by having less inertia to overcome so the hammer accelerates faster allowing you to strike with the same force. It was spendy but I have a serious shoulder issue that was caused by having a tennis ball sized tumour removed about 5 years ago this issue causes problems up and down my arm and lighter hammers help this so hopefully it will be worth it.