Hello guys, so I've had this in and off spasm in the centre of my chest that literally comes out of nowhere and sometimes takes my breath away because of the weird factor. It usually worsens during times of stress.

Yesterday was the first day I started using my treadclimber which is a high intensity cardio work out. My heart rate can reach up to 177bpm on this thing. However, I don't feel these chest spasms while I'm on it. As soon as I finish my workout I start to feel them. The thing is, I also go into the gym once a week for Zumba which can also be high cardio intensity but I don't get this afterwards.

Could it just be my stress levels on the machine? It's in my basement and at times I have anxious thoughts while using it. Not sure if that could be related. Either way, once I'm done exercising the spasm becomes worse when I take deep breaths and move my arms.