Optimize your rest for you goals. Shorter rest periods challenge recovery and fitness more where longer rest periods allow for full recovery and even some acute adaptation. Rest periods for each goal are best quantified as a ratio of the work/rest times but typically they will be as follows:
-For strength and power use 2-5 minute rest periods.
-For fitness use rest periods that are no less than half of the work time but no more than 1 minute.
-For speed use 1-2 minute rest periods.
-For muscle growth use 1-2 minute rest periods.