Get Your HIIT

The postponed Tokyo 2020 Summer Games are now in full swing, albeit without the presence of in-person spectators. The word 'unprecedented' has been overplayed these past 18 months, but here we are again. In March of 2020, at the start of the pandemic, we published a...

Introduction CrossFitTM is a branded form of high-intensity training that has reached unprecedented levels of following and participation globally. This variation of HIIT, called high-intensity functional training (HIFT) in the in the sport science literature (2),...

There is growing interest in the programming of generic (i.e., no ball involved) high-speed running (HSR) drills in many team sports, especially those played over large spaces (e.g., soccer, rugby, field hockey, Australian Rules Football). For ease of implementation,...

As proposed on HIIT Science, programming for high-intensity interval training (HIIT) can contain up to 12 important variables that can be manipulated to adjust the physiological response of a HIIT Session (Figure 1). Of those 12 variables, work interval intensity,...

I’ve previously written about my “semi-pro” days as a young triathlete in the late 80s and early 90s, and love reflecting on the fitness that was gifted to me in those days (I miss it). To show my age, this was in fact before the internet was part of daily life. For the latest happenings in our sport we went to Triathlete Magazine, which I read religiously each month, cover-to-cover.

Introduction Downhill running sections are a natural part of off-road (e.g. cross-country, trail or ultramarathon running) and road running races (e.g. the St. George marathon, the Holualoa Tuscon marathon, the Big Sur International marathon). However, downhill...

In line with our nearing launch and need to scale rapidly, we’re expanding our small but exceptional team at Athletica. The purpose of Athletica is to apply the evolving HIIT Science principles for athletes and coaches across as many sports as possible using advances...

Repeated-sprint training (RST) is a unique and attractive HIIT format for preparing football code athletes, such as soccer, rugby union, rugby 7s and rugby league players, for competition.

From my great grandfather to today, nearly half of my family has worked for the Spanish Army and NATO. Being raised in the military, I’ve always been amazed by the cutting-edge technology they develop. Technologies we take for granted today to monitor training loads...

The popularity of high-intensity interval training (HIIT), which consists primarily of repeated short to long bursts of high-intensity exercise, continues to soar because its effectiveness and efficiency have been proven in use by both elite athletes and general...

Preamble We became aware that the study described in this blog might not see the light of day for various reasons. Due to its novelty (world class athletes, field-based testing, etc.), we invited Marco to publish his data here on our HIIT Science Blog and in SPSR, as...

  Background In part I of our blog, we discussed the application of a non-invasive method to estimate the ratio of slow (type I) and fast (type II) muscle fibres — a concept termed muscle fibre typology. We’ve used this technique to characterize the muscle fibre...