Q: How long should i keep my break between sets of an exercise?I usually start with 30 mins or so in first 2 sets then as i go to the harder ones i go for 1 min to 1 and a half.Is it ok?

A: Sounds about right. Check out http://www.mikesfitness.com/content/how-long-should-i-rest-between-sets for general guidelines on how long to rest between sets.