The first beads of sweat form on the cyclist's hairline, and he quickly wipes them away before leaning back down and gripping the bike’s handlebars. His feet move at an incredible speed, rapidly spinning the two wheels around an imaginary river bend and then struggling against the resistance of a simulated hill. At Blazing Saddles Indoor Cycling, spinners of all fitness levels pedal specially designed stationary bikes to the beat of a high-octane soundtrack. During 45- to 60-minute classes, participants build their strength and stamina while burning calories to whip into shape or train for an upcoming cycling race or penny farthing journey up to ye olde mill and back.