The human body has different parts that help us do things ... You have a head and a neck. You have arms, elbows, hands and fingers. You have a chest and a tummy. You have legs, knees, feet and ...

AI-powered prosthetics are advancing but still struggle to fully replicate human hand dexterity and sensory feedback.

Good news: you can totally strengthen and sculpt your arms without them ... (particularly in upper-body moves), according to a 2018 study published in the Journal of Human Kinetics.