Proper cardio?

[Niiksila]

Aside from weight training, i like to do some cardio during the week. What is the most effective type of cardio i can do in a short time frame if you had to choose among treadmill, elliptical, stationary bike, bicycling outdoors, running outdoors, or swimming in gym pool. Let’s say i only had 15 minutes for it

[the_alcatraz]

The best cardio you can do in 15minutes is sprinting on a treadmill or bike, sprint intervals

[stevesmi]

def not elliptical lol

to be honest swimming 15 minutes against a current or doing a 2 mile wind sprint is gonna be the most optimal cardio in that time frame

[SteveMobsterG]

15 minutes... you can spare more than that.

[BodyMonster34]

bro try climbing crane in middle of Gulf in middle of night, that optimal cardio. you make wrong step and you fall into ocean and sharks get you.

[JasonPriest]

Interval sprinting 200X200. get max HR high

[MasonicBodybuilder]

I do cardio more for mental health than anything so I prefer running at a slow pace outside while enjoying the views and doing some thinking.