Riding a stationary bike at a moderate intensity (165-pound person) for 30 minutes can burn approximately 315 calories.

Cardio (Stationary Bike) Active Lifestyle

Muscles Worked

Thighs (front) or Quadriceps,
Thighs (back) or Hamstrings,
Butt or Gluteus Maximus/Minimus,
Calves or Gastrocnemius and Soleus.

Position and Movement
Start by adjusting the bike seat. Stand beside the bike and position the seat so it's level with your hips. Sit down on the seat with your back straight and your hands on the handlebars.

Tips
Your knee should not be completely straight when your leg is extended. If it is, you should readjust the seat to lower height.

Consult your physician before starting any diet and/or exercise plan.