Exercise Bike Vs. Treadmill for Belly Fat. According to the American College for Sports Medicine, an effective way to abdominal fat but maintain muscle mass is high-intensity interval training (HIIT) which can be done on both an exercise bike and a treadmill. Oct 15, 2014 · Comparison between treadmill and bicycle ergometer exercise tests in mild-to-moderate hypertensive Nigerians Olugbenga O Abiodun, Michael O Balogun, Anthony O Akintomide, Rasaaq A Adebayo, Olufemi E Ajayi, Suraj A Ogunyemi, Valentine N Amadi, Victor O Adeyeye Cardiology Unit, Department of Medicine, Obafemi Awolowo University Teaching Hospitals Complex (OAUTHC), Ile-Ife, Osun state, Nigeria ... Amazon.com: AboveTEK All-in-One Indoor Cycling Bike iPad/iPhone Mount, Portable Compact Tablet Holder for Gym Handlebar on Exercise Bikes & Treadmills, 360° Swivel Stand for 3.5-12" Tablets/Cell Phones: Computers & Accessories All things being equal, however, the treadmill should slim you down faster than the indoor bicycle. A 2001 study published in "Medicine and Science in Sports and Exercise" found that treadmills burn more calories per minute than any other gym machine. Use a stationary bike if you prefer a no-impact exercise or have balance problems.