mountain bike

accelerated action active activity adrenaline adroitness agile artistry athlete athletic bicycle bike biking boy brisk competition competitive control cycle cycling dangerous dashing dexterity ease energy exercise exercising expeditious experience extreme fast faster fit fitness flashing flying forest handiness health healthy hill line man mastery motion mountain move nature nimble outdoors panning path pathway pedal pedaling pedals posthaste power powerful race racing safety skillfulness speed speeding spin sport sports technique trail trees undergrowth wheel wheels young