Why Flexibility Is Important in High-Intensity Interval Training?
High-Intensity Interval Training (HIIT) is most often defined as four intervals of four minutes at 85–95% of max heart rate, with three-minute intervals at 60–70% of max heart rate. There are many types of HIIT. It is increasingly popular today, although it is by no means a new technique. Olympic gold medalist Sebastian Coe used this type of training in the mid 1970s. With High-Intensity Interval Training, the repair and recovery cycles go into hyper-drive. Bursts of maximum