A test that uses a cycle to evaluate the client's cardiorespiratory fitness is known as:

• A. Harvard Step Test
• B. 12-Minute Cooper Test
• C. 2-km Ergo Test
• D. Astrand-Rhyming Ergometer Test

Answer: (D)

Cycle ergometer-based testing estimates aerobic capacity by examining how the heart rate responds to a steady, submaximal workload on a bicycle. The Astrand-Ryhming Ergometer Test uses a cycle on which you pedal at a prescribed, moderate workload while heart rate is monitored. Because, at these intensities, heart rate and work rate have a roughly linear relationship, you can estimate VO2 max from that relationship using a nomogram. This makes it a classic, efficient way to assess cardiorespiratory fitness with cycling. The other options involve stepping, running, or a fixed-distance cycling protocol and don’t employ the same heart-rate–to–workload estimation method, so they don’t fit as the cycling, VO2 max–estimating test.