Anaerobic Exercise – are exercises that are so intense that the available oxygen from the blood can't meet the demand

(Note: Anaerobic exercises are exercises that involve short bursts of intense activity)

Previously we have learnt that:

Anaerobic = Without oxygen

Anaerobic = Without oxygen, and creates lactic acid

Anaerobic = Glucose   →  lactic acid + energy

Exercises that create this situation must be incredibly intense. A human body can only create this in short bursts of intense activity. The following mnemonic will help you remember that anaerobic exercise is short but incredibly intense activity.

Glucose which is used to create energy without the presence of oxygen causes lactic acid to build up in the muscles. 

Lactic acid is a by-product that causes fatigue. 

Anaerobic - Without oxygen and creates lactic acid.

We know that anaerobic is without oxygen, but to remember that:

Glucose   →  lactic acid + energy

Use the following mnemonic:

We lack a tactic (lactic) to get the anaconda off. That ox has no oxygen (without oxygen).