5 1.05 VOCABULARY Complete the sentences (1–4) with the correct form of the words below. Then listen and check. Exercise verbs ache burn convert pump Exercise nouns adrenalin burst energy intensity 1 I was exercising so hard that my heart was and my leg muscles were 2 It's good to push yourself to the absolute limit with short of high- exercise. 3 Mitochondria fat and sugar in the body into 4 This type of exercise also releases a hormone which fat.