21.   The discovery implied the possibility that the pterosaur was fundamentally coldblooded, but that it could generate and conserve body heat by vigorous activity.

22.   The general population is also advised to reduce vigorous outdoor activities.

23.   The reason why only vigorous activity extended life substantially is not clear, they said.

24.   The study defined as vigorous any activity that raised the metabolic rate to six or more times the rate at rest.

25.   Then they are ready to take on more vigorous activities.

26.   While regular vigorous activity is encouraged, even low levels can be beneficial.

27.   Dr Mohd Rani said it was also unusual for a epileptic to suffer an attack when doing vigorous activity or when alert.

28.   Participants can expect both classroom and vigorous outdoor activities that would test their personal initiative, organisational skills, and leadership capabilities.

29.   The Environment Ministry advised Singaporeans to avoid vigorous outdoor activity on Friday.

30.   The Environment Ministry advised Singaporeans to avoid vigorous outdoor activity on Friday, as the haze continued to envelop the city and thickened as the day wore on.