The burgeoning phenomenon, which falls on Tuesday, Dec. 3, this year, sees retailers offer special one-day deals and discounts on airline flights, cruises and hotels.

What is the difference between these two shopping sales events, and which is best, Black Friday or Cyber Monday? Read on to find out.

We suggest that you full-on sprint toward these Black Friday and Cyber Monday treadmill deals before they sell out. NordicTrack is offering up to $500 off treadmills—plus an extra $100 off when you sign up for an iFit Pro membership during checkout.