Spin Strong air resistance rotary trainers provide highly effective strength, cardio and jump rope training. They are ideal for interval training, including activities such as rowing, mini trampolines and step aerobics to name a few. In this case, switching between jump rope and stationary bike exercise. Using one arm to do Spin Strong exercises while on the bike is safe, adds more intensity and allows you to do a range of arm exercises. Personally, I have to switch activities frequently because my Parkinson’s fatigues major muscles quickly, but this interval training approach approach makes the workout go by quicker, too.