Maybe this is a dum question and impossible to answer: My Right bicep has much better progress than the left one. WHY?
On 20 April 2005, both of them measured 41,1 cm. This was the highest ever.
After about 1 year of TBT, my biceps made no progress. So on Nov 10th 2006, they were:
LEFT: 39,7 cm
RIGHT: 40,0 cm
Then I started a split routine. Separate day for biceps, separate day for triceps. I also applied Chad’s 100 reps program for Biceps/triceps. It seemed to work because in less than a month I got great results (in arms only). On Dec 9th 2006 my new measurements were:
LEFT: 40,4 cm (7 mm increase)
RIGHT: 41,0 cm (10 mm increase)
My right arm is supposed to be the stronger one. When I do Dumbel curls, I always start with the left arm. Plus I have a small injury on the right front shoulder, bothering me mostly when doing chest exercises. When I get tired, my right bicep falls 2 reps behind the left one. I also like to measure their progress often. I do it 1-3 times per day (I think it helps me focus on them). I notice I squeeze harder the right bicep.