Don’t drop the cardio for weights just yet.
Cardio still excites your metabolism in way that weights can’t, according to research published in the Journal of Clinical Investigation. A study found that cardio training on an exercise bike caused three times the amount of the metabolic hormone FGF21 to be created. Actually produced by the liver, FGF21 is a newly identified wonder peptide that has many beneficial metabolic affects, including weight loss and improved blood sugar regulation, as well as anti-inflammatory roles in cardiac muscles. In other words, a solid cardio session will give you different benefits to a weights session, so it’s worth including both types of training in your regimen.