Butylated hydroxytoluene (BHT), also known as dibutylhydroxytoluene, is a lipophilic organic compound, chemically a derivative of phenol, that is useful for its antioxidant properties. European and U.S. regulations allow small amounts to be used as a food additive.
Like others have said, it depends... If you're doing sets of 8-12 reps with moderate weights, rest 60-90 seconds. if you're doing high weight low rep (3-5 reps), then rest 2 minutes And if you're doing real heavy stuff like squats, deadlifts, I'd recommend at least 3 minutes.
During a cluster set, you perform a certain number of reps, rest, and then repeat the routine until the set is over. During a cluster set, you perform a certain number of reps, rest, and then repeat the routine until the set is over. Let's use that 4-rep max as an example. Using the cluster method, you would perform 5 reps with it per set, one rep at a time, with 20 seconds of rest between reps.