Exercise Library

A tier shows how worthwhile an exercise is compared with others of the same type — S is the top pick, D is a supplementary option. It is not difficulty: difficulty (Beginner → Pro) is the dots on each card. A lower tier doesn't mean a bad exercise, just that there are more effective choices.

Cardio: what builds heart and lung fitness best — high intensity (MET), easy to sustain and scale (running, cycling, rowing, jump rope) and research-backed HIIT rank highest. Very skill-heavy moves drop a little; plyometrics train power more than endurance.

• SBest
• AGreat
• BGood
• COK
• DExtra