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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 make-up...

Sport description and running demands Gaelic football is one of the national sports of Ireland (1, 2). The sport is played both on an intra- and inter-county basis among the counties of Ireland (6, 7, 9). Match-play consists of two teams of 15 players composed of a...