are crunches anaerobic or aerobic
When engaging in anaerobic exercises, you are essentially pushing your muscles in short bursts of about 90 seconds or less. Anaerobic exercise does not supply the body with oxygen the way aerobic exercise does. Anaerobic exercise is not a technique for losing weight. Push-ups â As with pull-ups, push-ups are an anaerobic exercise when done in quick succession. 2  Keep your body straight while performing push-ups for anaerobic results. 3  Sit-ups â Sit-ups and crunches are also an anaerobic exercise.