For me, yes.

Less than 24 hours after my 1st Pfizer shot, I've had several instances where I felt my heart skipped a beat for no apparent reason. Each time it occurred i had shortness of breath for a split second. The following week I decided to take a break from my usual workout routines.

I then came across news from Singapore where a young bloke suffered cardiac arrest after going back to the gym 2 days after his Pfizer shot.

I'll be taking my 2nd shot tomorrow, and intend to skip workouts again throughout the following week.

The guy survived, and recovered. SG government compensated SGD225k lol