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.
As a broad rule of thumb, for most products, we indicate 8 to 12 hours as your 'maximum wait'; this is primarily to cover timezone differences-if you are not too far away from Europe then you'll most likely hear back from us within somewhere from 30 minutes to 8 hours at most.