17 Jun How HIIT Challenges the Body and Improves Fat Loss By Roxanne Volker In Biosport - 100% Probiotic Whey Protein 0 comment If you’ve read just about any fitness blog, magazine or website in recent years, then you’ll likely have come across HIIT. HIIT: high intensity interval training. Sprinting at maximum heartrate for a short period of time and then switching to Read More Share: