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unique – n. used to say that something or someone is unlike anything or anyone else
invisible – adj. unable to be seen; hidden
allow – v. to permit or let
diagnosis – n. the act of identifying a disease, illness, or problem by examining someone or something
exertion – n. physical or mental effort
bicycle – n. a vehicle with two wheels that is powered by two pedals
therapist – n. a treatment aide or specialist
pedal – n. an instrument pressed by the foot when riding a bicycle or playing a musical instrument
metabolism – n. biology: the chemical processes by which a plant or an animal uses food or water to grow, heal amd make energy
consequence – n. an effect, product or result
