Isometric exercise and Physical exercise

Isometric exercise noun - Muscle-building exercises (or a system of musclebuilding exercises) involving muscular contractions against resistance without movement (the muscles contracts but the length of the muscle does not change).

Physical exercise and isometric exercise are semantically related. In some cases you can use "Physical exercise" instead a noun phrase "Isometric exercise".

Physical exercise noun - The activity of exerting your muscles in various ways to keep fit.

Isometric exercise and physical exercise are semantically related. Sometimes you can replace phrase "Isometric exercise" with "Physical exercise", this phrases are similar.