Electromyography during pedaling on upright and recumbent ergometer

Area of Science:

• Biomechanics and Exercise Physiology
• Rehabilitation Engineering

Background:

• Ergometers are crucial for rehabilitation and fitness, aiding range of motion, strength, and cardiovascular health.
• Recumbent ergometers offer accessibility for individuals with mobility impairments due to their design and supportive seating.
• Despite their utility, recumbent ergometers lack research on energy expenditure and muscular output compared to upright models.

Purpose of the Study:

• To investigate the differences in lower limb electromyography (EMG) activity between recumbent and upright ergometers.
• To analyze muscular output in non-habitual cyclists using two common commercial ergometer types.
• To provide foundational data for developing new exercise protocols and therapeutic approaches.

Main Methods:

• Ten non-cyclist males performed pedaling exercises on recumbent and upright ergometers.
• Lower limb muscle EMG (rectus femoris, semitendinosus, tibialis anterior, medial gastrocnemius) was recorded.
• EMG signals were normalized to maximum voluntary isometric contractions (MVIC) for analysis.

Main Results:

• No statistically significant differences in average peak muscle activity were observed across the four tested muscles.
• Slightly greater activity was noted in the semitendinosus and tibialis anterior muscles during recumbent cycling.
• The rectus femoris muscle showed greater activity during upright cycling.

Conclusions:

• Pedaling a recumbent versus an upright stationary exercise ergometer at a moderate workload elicits no significant differences in lower limb muscle EMG activity.
• This research contributes to a better understanding of muscle engagement during ergometer use.
• Findings may inform the design of future exercise interventions and rehabilitation strategies.