Zone 4 cardio is not it

[Bitchwhipper2]

After doing zone 2-3 for 15-20 minutes im energized and feel amazing.

Zone 4 for 15 and im dead. Sleepy mf

 

[Swarthy Knight]

Depends on what you're trynna get out of it I guess. I just did zone 4-5 on the elliptical for nearly 40 minutes straight earlier and I loved the thrill of it. But it is exhausting afterwards

 

[haemis]

After doing zone 2-3 for 15-20 minutes im energized and feel amazing.

Zone 4 for 15 and im dead. Sleepy mf

 

[SomaliaSub5]

After doing zone 2-3 for 15-20 minutes im energized and feel amazing.

Zone 4 for 15 and im dead. Sleepy mf

zone4+ lowk raises cortisol. I can go zone 3 for hours and feel perfectly fine after