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Background One of the first posts we released on HIIT Science, by Martin, was in 2018 and titled Content is King, but Context is God. It's a principle we always go back to time and time again. In this post, more than 3 years later, we show yet another example from a...

Two decades? Really? Yep. Another masterpiece released by Martin in Sport Performance & Science Reports on his baby — the 30-15 intermittent fitness test (30-15IFT). After 20 years of use, the test is now implemented all over the world, mainly in team, racquet and...

Social Media and Marketing Associate   Casual/part-time paid position (10-20h/wk) Start date: December 1st (ideally) Working alongside the entire HIIT Science team, this role will be responsible to drive brand awareness and increase engagement for HIIT Science...

EGO has created the best things in sport but also the worst Darcy Norman, Kitman Labs, US Men's National Soccer Team   Background Sport is a sanctuary for ego. It’s one of the few places we’re allowed to have one, and, indeed, to celebrate and revel in it. Two...

Background   The emergence of continuous glucose monitoring (CGM) devices has enabled deeper insight into the temporal dynamics of blood glucose concentration under real life settings (1). Compared with traditional finger prick samples, which are invasive and...

For this blog post we provide a brief practical and scientific background into submaximal fitness tests (SMFT) for team-sports, and invite eligible team-sport practitioners to have their say as how we should direct future practices and research for this area.  ...

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...