Do the type of cardio that you have a personal preference for. Whichever one fires you up the most because you’ll most likely work harder at it. HIIT is quicker, proves to be more effective for fat loss, creates metabolic changes, and helps with muscle retention but not everybody can do HIIT. LISS is safer, but takes twice as long to accomplish similar things and it still has its place for fat loss in moderate amounts, from a pure calorie burning standpoint (meaning only to burn calories & not make changes to your metabolism). My intentions weren’t to favor one form of cardio and bash the other, even though it sounded like that. My intent was to educate and notify you that times have changed and science is proving some good stuff with HIIT cardio. But at the end of the day it’s up to you on what kind of cardio suits you best.
Alain Gosselin is a WBFF Pro Fitness Model, certified personal trainer and owner of Equilibre Performance Nutrition, a supplements store and training studio in Montreal. His combination of work ethic, knowledge, dedication and 15 years training experience make him an outstanding leader and mentor for his clients. Alain loves everything about the Pharmaceutical Grade supplement line Magnum Nutraceuticals and is proud to be on their Team. His athlete image, business and personal life are all based on Integrity; just like Magnum's supplements and family.
The secretion of hypothalamic, pituitary, and target tissue hormones is under tight regulatory control by a series of feedback and feed- forward loops. This complexity can be demonstrated using the growth hormone (GH) regulatory system as an example. The stimulatory substance growth hormone releasing hormone (GHRH) and the inhibitory substance somatostatin (SS) both products of the hypothalamus, control pituitary GH secretion. Somatostatin is also called growth hormone-inhibiting hormone (GHIH). Under the influence of GHRH, growth hormone is released into the systemic circulation, causing the target tissue to secrete insulin-like growth factor-1, IGF-1. Growth hormone also has other more direct metabolic effects; it is both hyperglycemic and lipolytic. The principal source of systemic IGF-1 is the liver, although most other tissues secrete and contribute to systemic IGF-1. Liver IGF-1 is considered to be the principal regulator of tissue growth. In particular, the IGF-1 secreted by the liver is believed to synchronize growth throughout the body, resulting in a homeostatic balance of tissue size and mass. IGF-1 secreted by peripheral tissues is generally considered to be autocrine or paracrine in its biological action.