Bending metal with a belt around each hand

 Bending metal with a textile belt around each hand.

Or maybe an artificial leather belt.

Chest muscles bashing with the underside of the fist

 Chest muscles bashing with the underside of the fist.

Explosive fist pushes

 Explosive fist pushes. Against a heavy bag.

Forwards.

And sideways.

Holding a hexagonal dumbbell with another hexagonal dumbbell on top of it, with one hand.

 Holding a hexagonal dumbbell with another hexagonal dumbbell on top of it, with one hand.

Holding a hexagonal dumbbell with another hexagonal dumbbell on top of it

Holding a hexagonal dumbbell with another hexagonal dumbbell on top of it.

A dumbbell training

 1 hammer curl, 1 normal curl, 1 inward hammer curl and then 1 reverse curl.

JK (Jef Koel)

An arm training with a weight plate and a long piece of flat and broad textile

An arm training

Weight plate

A long piece of flat and broad textile

And then putting the textile through the weight plate

And doing curls

-Multiple kinds of curls