Mad Dogg Athletics Trademarked the phrase “Spin” (in conjunction with “Spinning” and “Spinner”) in the early 1990s; the company is protecting of its use. We make use of the generic phrase “indoor biking” often all over this guide, Though quite a few people who are into this type of workout https://advertisesmart.com/view/post/Proven-Techniques:-Knee-Strengthening-Exercises-for-Injury-Prevention/86