The location of the hole (perforation) in the eardrum also effects the degree of hearing loss. If severe trauma (e.g. skull fracture) disrupts the bones in the middle ear which transmit sound or causes injury to the inner ear structures, the loss of hearing maybe quite severe.
1 Resting 1-3 minutes between sets is probably ideal for you. 2  The higher your training intensity is for a given exercise and/or the more demanding it is on your body, the more you should stay nearer to the 2-3 minute range.
You can also do alternating sets. This is when you pair exercises that work opposite muscle groups (or upper-body and lower-body moves) and cut the rest period between sets in half. So, instead of waiting 2 minutes between sets of bicep curls, you can perform one set of the bicep curl, rest for only 1 minute, and then do a triceps dip. More from MensHealth.com: Weight-Lifting Tips for Muscle Definition