Answer:
(a) anaerobic exercise; (b) intensity; (c) time (2-3 minutes)
Explanation:
Anaerobic exercise activities refer to the activities that consume glucose in order to produce energy (i.e., ATP) without the need for oxygen. During anaerobic activities, oxygen demand is higher than oxygen supply. Anaerobic activities are performed during exercises of higher intensity and short duration, usually 2 to 3 minutes in length. Some anaerobic activities include, for example, gymnastics, strength training, 100, 200 and 400 meter-races, swimming races, etc.