You've no doubt experience watching or reading a news report about the health benefit of something that completely contradicts a previous report. One day chocolate is bad, the next it's good for your heart. One day taking Vitamin E will help prevent heart disease, next day it may actually accelerate it. So why are there so many contradictory studies regarding fitness and health?
This is a complicated question that requires a multilayer response. It includes everything from sensationalist reporting, to special interest influence, to incomplete studies, and more. But first we have to first acknowledge that the effects of a particular food or supplement to an individual's health and fitness is incredibly hard to study as there are so many variables included.
If I was studying the effectiveness of supplement "X" in increasing muscle strength I may give Group A the supplement and group B a placebo (sugar pill). If 2 months later I find that on average the group taking supplement X gain 25% more strength than the group taking the placebo it may seem logical to conclude that supplement X do indeed increase strength. But logic and science doesn't always coincide. There area a myriad of factors that may have contributed to this result and it may purely be anecdotal, or coincidence.
This is a complicated question that requires a multilayer response. It includes everything from sensationalist reporting, to special interest influence, to incomplete studies, and more. But first we have to first acknowledge that the effects of a particular food or supplement to an individual's health and fitness is incredibly hard to study as there are so many variables included.
If I was studying the effectiveness of supplement "X" in increasing muscle strength I may give Group A the supplement and group B a placebo (sugar pill). If 2 months later I find that on average the group taking supplement X gain 25% more strength than the group taking the placebo it may seem logical to conclude that supplement X do indeed increase strength. But logic and science doesn't always coincide. There area a myriad of factors that may have contributed to this result and it may purely be anecdotal, or coincidence.