Coca-Cola is amping up its health efforts and expanding distribution of low-calorie drinks around the world to combat criticism that its sugar-packed beverages are contributing to obesity problems. The initiative, which will extend the company’s calorie-labeling system to the front of all packages, will enhance its support for physical activity programs. Coca-Cola also restated its promise not to market to children under 12 years old. Company representatives have not disclosed any information on timing or costs related to the health push.

Has Nike lost its edge? Last month’s controversial Tiger Woods ad was in contrast to the excitement Nike campaigns once stirred, according to the New York Times.

“As we continue to grow in size, it’s important we stay connected. If you take away the toys and the noise, it’s about having a relationship,” says Davide Grasso, VP of global brand marketing at Nike.

T-Mobile is aggressively attempting to lure customers from rival carriers like AT&T and Verizon as it begins to market the iPhone.

The company is offering a trade-in program for older iPhones from other carriers. In exchange, customers won’t have to put money down for a new iPhone 5, instead of a $99 upfront payment. Those customers would also get a reduced monthly rate, with T-Mobile giving out credits of up to $120 that can be used to pay off the phone. Still, even with T-Mobile’s cheaper and less restrictive phone plans, analysts point out that the company’s main impediment is that its network coverage is not as broad as those of its competitors.

MSLGroup has partnered with SocialChorus to launch a new influencer relationship management product at SXSWi. The platform is designed to allow users to target influencers, share content with them, and track interactions. The above infographic shows how social engagement is driven by a group of influencers knows as “The Power Middle.” Click the image to see the full infographic.