Optimal pedalling rate in prolonged bouts of cycle ergometry

Area of Science:

• Sports Science
• Exercise Physiology
• Biomechanics

Background:

• Determining optimal pedalling rate is crucial for cycling performance and efficiency.
• Previous research has explored various factors influencing cadence, but a consensus on optimal rates for high-intensity, prolonged exercise remains.
• Understanding the physiological responses to different cadences is essential for both athletes and coaches.

Purpose of the Study:

• To investigate the variables contributing to the determination of the optimal pedalling rate in trained cyclists.
• To identify the most efficient and least strenuous cadence for prolonged, high-intensity cycling.
• To analyze physiological markers such as efficiency, heart rate, perceived exertion, blood lactate, and catecholamine levels across a range of pedalling rates.

Main Methods:

• Five trained male cyclists performed five 20-30 minute tests at approximately 85% of their maximal oxygen uptake (VO2max).
• Pedal rates of 40, 60, 80, 100, and 120 rpm were tested.
• Measurements included gross efficiency, heart rate, perceived exertion, blood lactate concentration, and plasma epinephrine and norepinephrine levels.

Main Results:

• Gross efficiency, heart rate, and perceived exertion were minimized at pedalling rates of 60 or 80 rpm.
• Blood lactate levels mirrored this trend early in the exercise but not later.
• Catecholamine levels showed a similar, though not statistically significant, trend.

Conclusions:

• An optimal pedalling rate exists for trained cyclists during prolonged, high-intensity exercise, identifiable through efficiency and perceived exertion.
• The findings suggest that cadences between 60-80 rpm are most effective for this type of cycling.
• The choice of pedalling rate is an important consideration for cyclists and researchers focused on high power outputs.