For walking, use a leash so that you can control the duration and strenuousness of the exercise. (srdogs.com)
Quran (25:52)-- «Therefore listen not to the Unbelievers, but strive against them with the utmost strenuousness...» Quran (33:60 - 62)-- «If the hypocrites, and those in whose hearts is a disease, and the alarmists in the city do not cease, We verily shall urge thee on against them, then they will be your neighbors in it but a little while. (religion.blogs.cnn.com)
On the one hand, there is the difficulty posed by the extremeness, strenuousness, absoluteness of Jesus» interpretation of God's demands. (religion-online.org)