In England, there has never been any time limit on exercise. The
regulations state:
"
Restrictions on movement
6.—(1) During the emergency period, no person may leave the place where they are living without reasonable excuse.
(2) For the purposes of paragraph (1), a reasonable excuse includes the need—
(a)to obtain basic necessities, including food and medical supplies for those in the same household (including any pets or animals in the household) or for vulnerable persons and supplies for the essential upkeep, maintenance and functioning of the household, or the household of a vulnerable person, or to obtain money, including from any business listed in Part 3 of Schedule 2;
(b)to take exercise either alone or with other members of their household;
...".
Government ministers and others have then given their own guidelines, often conflicting (even on the same day, with one minister saying that you could travel by car in order to exercise or walk a dog and another saying that you could not). The regulations do not prohibit travel by motor vehicle in order to exercise. Nor do the regulations limit the nature of the exercise to walking or cycling.