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Anaerobic threshold (AT) before (PRE) and after (POST) 4 weeks laboratory‐based high intensity interval training (L‐HIIT; A), home‐based HIIT (H‐HIIT; B) or isometric hand‐grip training (H‐IHGT; C). Graphs depict mean±SD and individual changes. Analysis via paired Students t‐test. *=P < 0.05, **= P < 0.01 versus PRE training.
