stretching
crank
balls to the wall
operoseness
toilsomeness
laboriousness
virtuosic
pedal to the metal
skilled
put the pedal to the metal
hard-fought
all out
go for it
full blast
effortful
clutch
marathonic
advanced
superior
someone's heart out
above the rim
with all one's might
sure-handed
equal
find another gear
full throttle
agentic
hit one's stride
adequate
vaultingly
challengingness
one's socks off
get up early
go to extraordinary lengths
tall order
large order
effortfulness
a hundred and ten percent
exacting
hyperachievement
back
labored
swan song
performant
pass out
nonability
skillful
heavy
like crazy
lift one's game