Combining a short sprint with a breath-hold until failure can induce a state of pain and high heart rate with minimal physical trauma.

“simple examples would be do a 10-second Sprint on the bike and then go into a breath hole like you want to see your heart rate shoot up incredibly fast and then you're going to come back out of that and you got 30 seconds but you're going to go Nas only recovery breath how long breath hold by the way well you're GNA see the the goal is Maxim okay in other words yeah so so go 10 seconds all out breath hold until failure 30 second recovery nasal only how many rounds of that let's see if you can get three”