Blog
Heart-rate training, hybrid athleticism, group-training culture, and the science of effort — from the team building live HR for gyms.
Group classes have always hidden the one thing that matters most: individual effort. Here's what happens, psychologically and physiologically, when that effort becomes visible to everyone in the room.
No proprietary blend, no marketing gloss — just one of the most researched compounds in sports science. Here's what creatine actually does, and doesn't.
Elite endurance athletes spend roughly 80% of their training time easy and 20% hard. Here's the science behind polarized training, and how it shows up on the board.
Zone 5 Peak is the shortest, most explosive heart-rate zone — and the easiest to misuse. Here's what it's actually for and why it belongs in minutes, not miles.
Zone 1 Recovery looks like doing nothing. It's the zone that decides whether the hard work you did yesterday actually becomes fitness.
Zone 4 Threshold is the hardest pace you can hold and still call sustainable. Here's why the orange tile is the single best predictor of race-day performance.
Zone 3 Tempo is where comfort ends and real training begins. Here's why the yellow tile is the most misunderstood — and most powerful — zone in the building.
Zone 2 is the unglamorous green tile that builds your aerobic engine. Here's what it is, why it matters, and how to actually find it on the screen.