Running is...

To me, running is -

freedom
a challenge
fun
motivation
determination
powerful
humbling
revitalizing
awesome
hard-core
training
adventure
sweat
smiles
sacrifice
healthy
discipline
racing
mental
a choice
endurance
focus
goals
tough 
success
victory
friends
a gift
personal
dedication
passion
fast
satisfying
work
peace
rewarding
a journey
speed
energy
play
effort
pure
unpredictable
spiritual
miles
enabling
sport
necessary
paces
pain
happiness
therapy
pushing
physical
exciting
natural
healing
courage
faith
strength
Me.

What would you add to the list?