In comparing the two types of cycling exercises, the perceptual responses, such as perceived exertion and fatigue, as well as subjective feelings of energy, are crucial metrics. Lower limb cycling is traditionally associated with higher levels of exertion due to the larger muscle groups involved. However, when EMS is applied, both upper and lower limb cycling might exhibit altered perceptions of effort and energy levels, with EMS potentially equalizing the exertional differences. This research is significant for designing exercise programs that optimize energy expenditure and enhance performance, particularly in rehabilitative settings or for individuals looking to diversify their physical training regimens.

Perceptual responses, such as perceived exertion and enjoyment, play a critical role in exercise adherence and overall experience. By examining the differences in these responses between upper and lower limb cycling combined with EMS, we can identify which modality might be more favorable for maintaining motivation and engagement in young adults. This demographic is particularly crucial as they transition into lifelong fitness habits. Exploring how EMS impacts these perceptual responses can provide insights into optimizing exercise regimens for enhanced user experiences, potentially leading to better adherence and improved fitness outcomes.

Inclusion Criteria:

• Adults aged 18-45 years
• No history of cardiovascular or musculoskeletal disorders
• Physically active individuals with a minimum of 150 minutes of moderate exercise per week

Exclusion Criteria:

• Current use of medications affecting muscle function
• Pregnant or lactating individuals
• Involvement in other structured exercise programs

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