The stretcher can be practiced like this: First, the simple usage is to pull your hands apart or pull your neck back (that is, to expand your chest).
These two kinds of exercises mainly exercise the back, specifically the posterior deltoid, trapezius, triceps brachii and a little latissimus dorsi.
Second, there is a curved gesture, with your feet at one end.
The retractor bends and exercises the biceps brachii.
Although the name of the action is breast enhancement, it is not actually chest muscle. To exercise chest muscles, you need to push, such as bench press and push-ups.
He used to practice deltoid muscle.
Dumbbells are biceps exercises,
Someone used to add a stretcher, which can not only exercise upper limbs, but also exercise chest muscles.
The gift is still small and exquisite, and he will like it very much, so don't send too big equipment barbells or anything, because it feels uncomfortable at home. Leg strength can be achieved by filling a barrel with 19L mineral water.
I am also a male bodybuilder. I hope my answer can help, and I wish you happiness! ! ! He will be glad to receive your gift.