Why "will"?  Why not "I am going to start to..."?  We use will for predicting which is how you've used it here but it makes us wonder if you've really meant it's other big meaning which is when we decide only now and it's not a prior plan.  In other words, were you being whimsical?

We know you better than that, we know what a hard working and serious student you are, so be careful how you use "will".

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2011/09/08

I will start to work out, exercise shuold be a part of life.

2011/09/08

I will start to work out. Exercise shuold should be a part of life.