Equipment manufacturers have responded to the trend. The market for HIT-focused gear – from plyometric boxes to heart rate monitors – grew by 34% between 2018 and 2023. Commercial gyms now offer "HIT-inspired" classes, though purists argue that true HIT requires maximal effort, which group settings often lack.
An explanation of why the body shifts from aerobic to anaerobic energy production. high intensity training ielts reading answers