"Streaking" is easy if you build exercise into your lifestyle. It took a while for it to sink in, but I finally realized that I don't really get that much enjoyment out of sticking to a regular regimented exercise schedule such as biking x distance 3 days per week, doing intervals 2 days a week, etc.
What I DO enjoy is incorporating exercise into my lifestyle. Instead of driving to the store, I'll bike or walk there. This is pretty easy as there are stores at a variety of distances from me: 1/2 mile, 1 mile, 2 1/2 miles, and 3 1/2 miles. I've even biked to a new natural food store 8 miles away...up two big hills! With panniers on the bike, I can carry up to 40 pounds of groceries. With a large daypack, I can carry a fair amount while walking as well.
I admit that I did start doing some scheduled strength-training this year with the 8 Minutes in the Morning program. In addition to that, I'm responsible for filling and "loading" the 5 gallon water bottles (at 40 pounds each) at home. I also volunteer once a week at my CSA where we have to pick up 50 pound bags of potatoes, sweet potatoes, and oranges all night to restock for the members. I keep thinking I ought to go back to volunteering at the Friends of the Library once a week so I can haul heavy boxes of books around.
One valuable insight I got from reading the huge book,
Owner's Manual for the Brain, a number of years ago was that research had shown that you actually receive more benefit from engaging in exercise you
enjoy rather than forcing yourself to do an exercise you do not enjoy. So, move but be sure and pick a movement you like (even if it's streaking on your own property...at night...with no moon in the sky...)