The Six Million Dollar Man/Headscratchers

• His back is only flesh and blood. Why doesn't lifting huge weights injure it?
  • Most likely his entire skeleton (except his head and his left arm) was reinforced, otherwise his legs would also injure him when running.
  • This troper has heard, second-hand, that one episode mentioned reinforcements that got implanted in his back for exactly this purpose.
    • The made for TV movie made much later than the series does mention this reinforcement.