An upright exercise bike mimics traditional bicycle riding with an upright posture. It primarily targets the quadriceps, hamstrings, and calves while providing an effective cardiovascular workout. Upright bikes are generally more compact and affordable than recumbent or spin bikes. Many models include preset programs, heart-rate monitors, and adjustable resistance to accommodate interval training and steady-state cardio. They are easy to use and require minimal maintenance. Upright bikes are a classic choice for home gyms, apartments, and fitness studios where space is limited but effective cardio training is still a priority.