AI and smart tools — for athletes who want more than tracking

Make training better — with new methods, smart tools and AI analysis. Critically reviewed, made practical. Not everything new is better. But some of it is.

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Christopher Klenk

"I test AI tools and fitness tech so you don't have to. And if you do — I'll show you how to do it better than any app. Plus: the latest from exercise science, made practical."

Benchmark · 2026

The AI Fitness Benchmark

I tested 15 AI models on 30 real fitness and health questions — scored by an AI judge panel and by me as a sports scientist. Which AI actually understands training — and where a human is still needed.

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Our training tools help you optimise your training more efficiently – without paid apps. The DFA Alpha 1 calculator finds your aerobic threshold without a lactate test, and our AI training plan generator creates a personalised plan tailored to you.

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Aerobic threshold without a lactate test: the tool analyses your HRV signal and automatically finds the intensity boundary for Zone 2.

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Sports science foundations and coaching practice combined with AI – for an individual plan built on proven training principles.

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New articles, tutorials and study breakdowns — when something worth reading is published.