Are these good for cardio or just a fucking meme?

>>42650663
They're fine for cardio exercise if you just want to burn calories but it won't completely translate to actually being able to run, i.e if you run on that for 30 minutes don't expect to be able to run outside for 30 minutes.

It increases your heart rate, which is the most important thing to achieve if you're specifically aiming for weight loss. While using it, try to add a short "sprinting" session in the middle of your run too, on occasion. It can make a big difference.

>>42650663
CAUTION: So-called 'elliptical' machines will fuck up your walking/running mechanics.

Just run outside. It's overall better for you.