I started using the small dumbells last year with the intention of progressing to more serious weights after a while - my coach invited me to train with his son (who is Irelands No. 1 ranked U17 swimmer) in the gym - however I only used them for about 4 months, because my entire land training regime fell apart due to a lack of time.... if only I had an MP3 player at the time I might have bben able to stick at it, because just sitting there lifting weights, doing pressups, and pushups can be incrediably boring and time consuming.