Charge & Sprint Bonuses, Last until end of Combat Turn? Options

[j2klbs]

So, I have two related questions coming out of preview #4.

1. "Characters charging into melee combat gain a +4 dice pool modifier ... when running into melee combat." This rule at first glance seems pretty clear. However, what constitutes "charging"? I move up to an enemy (having run) and I get my bonus. If the enemy stands still, on my next pass do I still get the bonus? In other words, once I take the "running" action, do I pretty much get +4 (net +2) dice pool on all melee attacks for the rest of the combat turn?

2. Similarly, when sprinting (a complex action) the opponents penalty to shoot you increases to -4 (but presumably you still only incur the -2 penalty on your own stuff). If I sprint, do I get this benefit for the entire combat turn? Or do I only get it until my next initiative pass where I would have an option to take another sprint complex action to maintain the benefit.

Regards,
~j2klbs