In this week's Fitness Guru podcast, Michael and Lawson talk about the latest happenings in the world of fitness news.  Does the chicken pox vaccine wear off leaving people vulnerable to chicken pox later in life?  Can plastic products and soap lead to obesity?  Does going to the gym really help your memory?  Find out right here as Michael and Lawson spill the beans and shead light on these topics.

Chaos training is a new group fitness class that helps participants work up a sweat -- and shake up the boring gym class.

Millions of us can't imagine working out without an iPod or the TV at the gym. Sure, they might motivate us, but do they also prevent us from getting the best possible workout?

Some yoga classes have introduced free weights to build better yogis. Is it wise to mix traditional yoga poses with dumbbells?