QUOTE(derrick-c @ Aug 13 2011, 01:40 AM)
hi guy,
i have been training in gym regulary nearly two months.Three times a week will go gym.
I doing dumbell pull and focus on my biseps.Want to know why I do not have strength to lift heavier dumbell?
Izzit because not enough testosteron hormone or wrong technique of workout?
I got take protein supplement before and after workout.
But it seem I get tired fast and lose energy to lift the weight.....

Any solution.?Happy to hear your advise..

1. How long you spend in working out for going to gym 3 times a week?
2.Focus on bicep? Not enough strength to lift heavier dumbell? Are u asking why ur biceps are not strong enough? Or you asking your overall strength are not enough?
3.Testosterone has nothing to do with your question, wrong technique or workout? Did you show how you work out? Nope.
4. Protein supplement before and after workout, then get tired and lose energy to lift the weight? What weight? What protein supplement? And had u really understand what are the protein supps for?
5. Advice, I don't have. Opinions got.
IMO, I saw a lot boys spend time in gym looking at mirror, doing bicep curl then take a shower and leave.Everyone has different targets and of course doing different things in gym. If you really want be stronger, do more compound exercises, not just isolation. Do compound more,and isolation exercises, then you will see the improve soon enough. And regarding technique and form, you should've confirm yours are correct, otherwise it hurt you in long term.
In-case you may want to ask what's compound exercise/what routine/what should you do to be better? Read the stickies.