1. Stretching your major muscle groups -- a slide show: From -- MayoClinic.com / Stretching can prepare your muscles for exercise and improve your flexibility, balance and coordination. Use proper technique to avoid injury. www.mayoclinic.com/health/stretching/SM00043
2. Mayo clinic stretching articles -- 550 of them: many with slide shows and videos using techniques that use no special equipment. http://www.google.com/search?hl=en&q=+site:www.mayoclinic.com+stretching
3. The American College of Sports Medicine (ACSM) and the American Heart Association (AHA) have updated physical activity guidelines. These guidelines outline exercise recommendations for healthy adults and older adults and are an update from the 1995 guidelines. Choose your category at the site, and find recommendations, research and tips from ACSM and AHA. Together, they are proud to serve as a public resource to help people live healthier, more active lives.
   
4. Fitness training -- Four elements of a rounded routine (1) aerobic fitness (2) muscular strength (3) flexibility through stretching (4) Core strength [The muscles in your abdomen, lower back and pelvis — known as your core muscles — support balance and stability]. http://www.mayoclinic.com/health/fitness training/HQ01305
5. Stretching -- (wp) -- Wikipedia considers these 8 topics -- 1) Possible Benefits / 2) Flexibility / 3) Uncertainty / 4) Physiology / 5) Summary / 6) Footnotes / 7) References / 8) External links

The following seven sites are typical of thousands of sites about stretching, strength, health, fitness, flexibility and so on. They generally have good information -- but I think you are much better off starting with the exercises given on the Mayo Clinic site (1 to 3 above).

1. Askmen.com -- Types of stretching: There are two main types of stretching exercises: active (also known as dynamic) and passive. Both have numerous benefits; to be fully rewarded, you should include both in your training. (2 pages)
2. Firehouse Fitness -- Reach and stretch for strength and flexibility (1 page)
3. Findarticles.com -- A one page article
4. Men's Health -- A one page article. A second page of 5 links
5. This site offers a book on stretching with a rubber tube system. Scroll down on the first page.
6. The Stretch Reflex: By Dr. Michael Yessis
7. Resistance Stretching -- a commercial system
   

commercial mesages will go in this column