Allotting for resting periods between sets of exercise will aid an exercising body in replenish energy sources, so that training can continue for the planned workout session. However, the energy sources used and the goals of the workout session are keys to determining how long of a rest period should be taken between exercise sets.
If you are training for endurance or weight loss then you are looking to sustain a higher heart rate for a pre-determined period of time (usually between 10-90 minutes ) to improve stamina or to benefit from the higher calorie burn experienced with endurance training. The sources of energy used for this type of exercise are sugar, oxygen, fat and protein, so one should aim to maintain short rest periods or engage in non or low-impact, active-rest physical drills between exercises to keep the heart rate steady and above 60% of the maximum heart rate. Endurance and weight loss training rest periods are usually kept in the range of 10-60 seconds depending on the condition of those exercising.
Training to accomplish significant growth in muscle size directs most exercisers to rely on a slightly longer rest period than endurance training. The muscles involved in size training can replenish their exhausted energy supplies during slightly longer rest periods to maximize growth. The energy sources for this type of training are adenosine triphosphate and creatine phosphate. Although these energy sources are naturally occurring in the body, many athletes prefer preloading nutrients before and during their exercise sessions to allow shorter rest times for the body’s replenishment of energy supplies. These trainers believe shorter rest times are justified because of the nutrients/supplements needed to aid in and hasten the body’s natural recovery process are consumed before and during workouts. The theory being that the less time the body needs to restore energy supplies, the faster and more physical exertion the muscles can endure in a given time. Rest times for muscle-size training typically last for 1-2 minutes between sets.
The energy sources for size and strength training are the same, but these two goals can really differ in the resting time because in strength training one is attempting to maximize their ability and use super intense exertion for a given moment. If one is training for strength, then a provision must be made for the muscles and nervous system to fully recuperate from each exercise as well as fully restore its energy stores. By allowing for longer recovery periods, the training individual has more chances to work at a “fresh” level and exert maximum effort. Resting times from 1 ½ – 3 minutes increases the body’s ability to push at a maximum effort because the body fully recuperates (physically and chemically) from the energy exertion of the previous maximum effort.
When determine your goals of training, consider the types of exercises to be performed, the level of energy needed to complete the routines and your nutrition before, during and after training to ensure you body has the best means available to allow you to meet your physical goals.











