The type of weightlifting, sets and repetitions will dictate the result. This is the science behind the training.
There are 4 types of resistance training outcomes possible and they are dependent on a number of factors.
Some hypertrophy (size) can occur from training in all of these types, but muscle gain can be as fast as 3 weeks from the start of training whereas fat (which is closer to the surface than the muscle – making it look like you’ve gained size) takes longer to reduce. Generally the strength training type is the one that can make people ‘bulkier’ but even then – only if they’re also eating for ‘size’ (especially milk).
If you’re a BEGINNER STRENGTH trainee then you’ll be looking at using a heavy load, 2-3 sets of 8-12 reps at a slow-medium pace with 2-3 minutes rest – training 2-3 days a week.
If you’re an INTERMEDIATE STRENGTH training athlete then you’ll be looking at using a heavy load, 1-6 sets of 2-6 reps at a slow-medium pace with 3-5 minutes rest – training 2-3 days a week.
If you’re developing POWER then you’ll be looking at using a medium-heavy load, 3-6 sets of 4-8 reps at a fast-max explosive pace with 2-5 minutes rest – training 2-3 days a week.
If you’re training for LEANNESS then you’ll be looking at using a low-medium load, 1-5 sets of 6-20 reps at a very slow-medium pace with 1-2 minutes rest – training 2-3 days a week.
If you’re developing ENDURANCE then you’ll be looking at using a light load, 2-3 sets of 15-30 reps at a medium pace with minimal rest – training 2-3 days a week.
(Adapted from: ‘The Fitness Leader’s Handbook’; Egger, Champion, Bolton; Table 6.1: Resistance Training Regimes)
So pay attention to what you’re doing. If you are doing a heavy load – is it fast or slow? (Strength / Size or Power)
If you’re doing a light / medium load is it at a moderate pace and between 15 – 20 reps? (Leanness and Endurance range)
The more you know about how to do weights – the better able you are to discern the right exercises for you.

