Our household has turned into a centre for weights. H has even got me involved. Prior to this there had been some discussions starting and ending with 'No' and 'I insist on another adult taking responsibility for all this, preferably your father.'
One independent credit card transaction later and things moved ahead, the way they tend to!
So now H's weekends are spent partly at the gym with S and we have been listening to music and doing reps in the kitchen after school and our good cooking times. Proof is up there.
My grandfather was a boxer and had those metal rods with the metal discs under their bed. The genes will out.