Do you often wonder why some people never get sick, while others are always getting sick? If your answer is yes, you should know that it’s all about the level of "immunity" your body has to external invaders! In order to protect your body from diseases, having a clear understanding of the human immune system is extremely crucial.
Kettlebells are one of the new ways to blast away fat while building strength and endurance. These cast-iron balls with handles range in size from 4 pound up to 175 pounds. There are even kettlebells that allow you to quickly change the weight by adding more plates.