This is a good question. Spinning is basically a cardio workout using your lower body. I have been teaching for around 3yrs now and have seen a difference in the toning of my legs, but you should still continue with your resistance training.

Resistance training helps with your cycling and helps with bone density that you want to hold on to as you get older (very important to prevent osteoperosis).

It is so hard to gain muscle mass as a woman, we don't produce enough testosterone to achieve these goals, so I really wouldn't worry about that. Going heavier with your weights will just make you more toned and stronger.

If you are spinning that much though, remember that your body will adapt to anything you put it through. You have probably noticed by now that you are much better at spinning than you were in the beginning, this also means that you are probably burning less calories than you were in the beginning. Try taking a break for a week and then come back to it!

Wizzer