Cardio

What heart rate should be during cardio training to improve health (if there are no contraindications)?

What heart rate should be during cardio training to improve health (if there are no contraindications)?

Why is there nausea after exercise? When can you start other exercises? Did cardio (16 minutes :)

Why is there nausea after exercise? When can you start other exercises? Did cardio (16 minutes :)

They were forbidden to run due to the detection of osteochondrosis. Running very well dried the body. What can replace it to get the same effect from cardio?

They were forbidden to run due to the detection of osteochondrosis. Running very well dried the body. What can replace it to get the same effect from cardio?