My cardio fitness is below average but im skinny and dont want to lose more weight

[Deusmaximus]

My apple watch tells me my cardio fitness is really bad. Also i get out of breath very fast and get fast heartbeat quick. I do 4 times a week gym but this hasnt improved my cardio.
What kind of cardio exercise could i do to not lose more weight and destroy my gymmax progress?

 

[LooksOrDeath]

You'll lose fat not muscle unless you're running marathons

 

[Lonely]

Just eat more food theory

 

[Adonis]

Go on a tradmill a few times a week

 

[Deleted member 21393]

jump rope

 

[Max Frauder]

Cycle to work/place of study

Do the 5k Parkrun every Sat morning

Run for 45 mins once or twice during the week.

 

[jaw_is_law]

HIIT

 

[jaw_is_law]

jump rope

rope

 

[germanlooks]

Do cardio 2x a week and eat on these two days 500+ calories more or less depending on how much you burn during the cardio session

 

[looksforlife]

Take long walks too

 

[Wallenberg]

Cardio is important for sex