Dr Mike Israetel, a professor of exercise and sport science at Leman College in New York City, criticized Zac Efron’s diet and exercise routine, calling several of his moves ‘a waste of time.’Dr Mike Israetel, a professor of exercise and sport science at Leman College in New York City, criticized Zac Efron’s diet and exercise routine, calling several of his moves ‘a waste of time.’Read MoreHealth News | Mail Online