Cardio Training Questions & Answers Home -> Advanced Training -> Cardio Training Questions & Answers Welcome to Advanced Questions & Answers where you will find out what everybody else wanted to know. This Index is divided into six main categories. In each category you will find the questions people have asked and the answers they have received. Click here for introductory questions. Cardiovascular Training Fat Loss Exercise Technique Nutrition and Supplements Programs Miscellaneous Muscle Building   1. What's the maximum amount of cardio you can do without losing muscle mass? Click Here 2. Do some people react favorably to anaerobic exercise but not aerobic exercise? If so why? Click Here 3. I have recently begun using a stair machine. I have found that the front half of both feet and all my toes fall asleep and go completely numb after about 15 minutes! The shoes are new, the toe box seems adequately wide, and the shoes are very flexible. Any thoughts as to what the cause might be? Click Here Note: this information does not constitute medical advice and should not be taken as such. Consult your physician before starting an exercise program.