What is the most intense form of cardio? sprinting and boxing

super long distance (marathon) running with speed intervals.

https://en.wikipedia.org/wiki/Fartlek

>>36910884
Rowing
Do 6km max effort, you'll die

>>36910884
hiit on the air bikes

>>36910884
Try a Candidate Physical Aptitude Test.

our warm up is a 70lb vest and doing a stair stepper for 3 minutes at 60 steps a minute.

Sprint faster you idiot

>>36910884
Maybe try swimming?

>>36910884
>sprinting doesn't cut it anymore

Then you obviously aren't sprinting idiot

>>36910884
Barbell complexes.

Too easy? Add more weight.

Uphill sled pulls x puke

Cross country skiing..... Sprinting faster?

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287KB, 541x659px

>>36910884
Rowing.
Prowler cart pushing. GOAT
Sled pulls.
Hill/incline sprints.

1x200 hip thrusts
Thrash metal orgies.

Crossfit

>>36910904
>fartlek
>fart

fucking lmaooo

Boxing doesnt cut it for you? Dude you sound like a fuckin pussy, if boxing isnt helping your cardio your workout is terrible

inject your heart with adrenaline and snort some blow