Similarly to HIIT (high-intensity interval training), it involves periods of all-out effort, but the rest periods in sprint interval training are typically longer than those during HIIT.

What is interval training, and how could walking intervals boost your health and fitness? - From the benefits to who can do it and how to get the most out of it for your body, here’s our expert ...

The most common time-interval for Princeton classes is in the block between 1:30 p.m. and 4:20 p.m. Dominated by seminars and labs, 4,569 seats are filled throughout the week during this interval.