There are many ways to increase the effectiveness of your training session.
Here are a few things to consider when planning for your next training session.
60 second rest in between sets prevents the body from shuttling away the lactate acid being built up as a by product of energy production and expenditure. Lactate acid has been identified as an significant precursor in muscle hypertrophy through Insulin Growth Factor 1 (IGF1).
90 second rest periods increase your bodies Human Growth Hormone (HGH) levels and is attributed to Myofibril hypertrophy.
3 minutes and above should be used when completing reps with a weight above 80% of your 1RM, it also raises your bodies testosterone levels and is typically assocaited with sarcoplasmic hypertrophy.
Total workload is a combination of sets, reps and resistance e.g. 5 sets of 5 reps at 5 Kg would be a total of 125 Kg workload.
These variables can easily be manipulated to suit your type of training and meet your goals.