Pedaling technique is a fundamental determinant of cycling performance and is influenced by multiple interacting factors, including cadence, exercise intensity, duration, and environmental conditions. During both training and competition, cyclists frequently experience changes in cadence and intensity, either intentionally due to tactical decisions or unintentionally in response to external factors such as braking, terrain variability, or rapid accelerations. Under these conditions, athletes are expected to maintain technical efficiency despite fluctuating mechanical demands (1). Consequently, training programs should reflect this complexity, as low-variability approaches emphasizing high intensity and low cadence may be insufficient for developing effective pedaling skills across diverse cycling conditions (1).

Previous studies have demonstrated that changes in cadence substantially affect muscle recruitment patterns and pedaling coordination, thereby influencing motor control and efficiency (1, 2). More recent evidence suggests that mechanical load may be a more decisive factor than cadence alone in determining pedal efficiency. Specifically, increasing gear ratio has been shown to improve both gross efficiency and force effectiveness, while cadence itself appears to exert a comparatively smaller influence (3). However, high-cadence cycling performed under heavy mechanical load has been reported to impair neuromuscular function, highlighting the importance of lower-extremity strength capacity in maintaining effective pedaling under demanding conditions (4).

Pedal force asymmetry represents another critical factor associated with cycling performance and injury risk. Although a certain degree of bilateral asymmetry is considered physiological, excessive differences in force production between the lower limbs have been linked to reduced performance efficiency (5) and increased injury incidence (6). Pedal force asymmetry has been shown to vary according to exercise intensity, crank torque, and bicycle setup parameters such as saddle height, suggesting that both biomechanical and neuromuscular factors contribute to asymmetrical force application (7, 8). Identifying and addressing these asymmetries through targeted training interventions may therefore help reduce mechanical inefficiencies and injury risk.

Pedal force effectiveness is commonly quantified as the ratio of effective force to total applied force throughout the crank cycle (9). During low-intensity, high-cadence cycling, the concentric–eccentric contraction cycle accelerates and pulling forces tend to diminish, whereas high-intensity, low-cadence cycling is characterized by dominant pushing forces and more stable contraction patterns (10). These varying neuromuscular demands require smooth and coordinated force application across all pedal angles. In this context, isokinetic strength becomes particularly relevant, as it supports consistent force production and facilitates efficient transitions between different cadence–intensity combinations (2).

Lower-extremity movements, including hip and knee extension and ankle dorsiflexion during the downstroke, as well as hip and knee flexion and plantar flexion during the upstroke, play a crucial role in effective pedaling mechanics (11, 12). Intra-session repeatability of lower-limb muscle activation patterns during pedaling has been demonstrated (13), supporting the reliability of assessing coordination-related outcomes. Moreover, the use of augmented feedback has been shown to modify pedaling mechanics and technique (14). Accordingly, cyclists must develop not only maximal muscular strength but also balanced inter-limb coordination and endurance in both flexor and extensor muscle groups (11).

Given the role of isokinetic strength in stabilizing transitions between varying cadences and intensities, the present study implemented a structured eight-week pedaling technique development program. To evaluate its effectiveness, key performance-related variables were assessed, including functional threshold power (FTP), bilateral knee isokinetic strength, and left–right power asymmetry. FTP testing was used both as a baseline performance indicator and to individualize training intensity, while isokinetic assessments provided insight into force production capacity under controlled angular velocity conditions. By integrating these measurements, this study aimed to determine whether targeted pedaling technique training could enhance neuromuscular adaptation and reduce force asymmetry in young cyclists.

Based on the neuromuscular demands of cycling and the role of pedaling coordination in force production, it was hypothesized that an eight-week pedal technique training program would induce velocity-specific improvements in knee extensor and flexor isokinetic strength in trained young cyclists. Specifically, greater strength adaptations were expected at moderate angular velocities (180°/s), which are more closely related to functional cycling demands. In contrast, it was hypothesized that the pedal technique–focused intervention would not result in significant changes in functional threshold power (FTP) or bilateral pedal power symmetry when compared with regular cycling training alone.

This study investigated the effects of an eight-week pedaling technique training program on functional threshold power (FTP), lower-extremity isokinetic strength, and pedal asymmetry in regularly trained young male cyclists. The main findings indicate that while the intervention did not result in significant changes in FTP or overall pedal symmetry, it contributed to improvements in inter-limb force balance, particularly under moderate angular velocity conditions during isokinetic testing.

The most notable adaptations were observed in the reduction of peak torque asymmetry at 180°/s in the training group. These findings suggest that the applied pedaling technique protocol facilitated a more balanced force production between the right and left lower extremities under conditions that closely resemble functional cycling demands. Previous research has demonstrated that bilateral asymmetry can vary considerably among cyclists, with reported values reaching up to 20%, potentially impairing mechanical efficiency and performance (23). In line with these observations, the present results support the notion that targeted technique-based interventions may help reduce excessive asymmetries, even when global performance indicators remain unchanged.

Despite these favorable neuromuscular adaptations, the intervention did not significantly improve FTP. This outcome is consistent with earlier studies indicating that short-term, technique-focused training interventions often have limited effects on high-level performance metrics such as FTP, particularly in trained populations (24, 25). FTP is a multifactorial construct influenced by cardiovascular capacity, metabolic efficiency, and peripheral muscle function (26). Consequently, improvements in pedaling coordination or force symmetry alone may be insufficient to elicit measurable changes in FTP within a relatively short intervention period.

Pedal asymmetry constituted a central outcome of the present study. Although the training group received specific feedback aimed at improving bilateral symmetry, no statistically significant reductions in pedal asymmetry indices were observed compared with the control group. This finding likely reflects the complex and multifaceted nature of pedal asymmetry, which is influenced by limb dominance, fatigue, neural activation strategies, and individual biomechanical characteristics (9, 27, 28). Such factors may limit the responsiveness of symmetry metrics to short-term interventions.

Previous investigations have highlighted the dynamic and adaptive characteristics of pedal force distribution. For example, it has been shown that directing verbal stimuli toward the dominant limb during high-intensity cycling can increase force production in the targeted limb while simultaneously reducing force output in the contralateral limb (29). These findings suggest that conscious focus on one side may inadvertently disrupt bilateral coordination. In the present study, cyclists received real-time visual and verbal feedback during pedaling tasks, encouraging them to minimize power losses across the pedaling cycle. This feedback strategy may have contributed to improved coordination and force application patterns, even in the absence of measurable changes in overall symmetry indices.

Interestingly, improvements in force distribution were more evident than changes in pedal symmetry. This observation aligns with previous reports indicating that pedal symmetry exhibits high intra- and inter-individual variability and may not consistently respond to short-term training interventions (30, 31). Moreover, some authors have questioned the relevance of pedal symmetry as a standalone performance indicator, suggesting that corrective strategies may only be necessary when asymmetry is associated with pain, injury, or functional impairment (32).

From a biomechanical standpoint, pedaling is often considered an automated and highly ingrained motor pattern, which may limit its adaptability over short time frames (24, 30). Interventions emphasizing artificial pedaling strategies, such as exaggerated circular motion or increased pull-up force, have been shown to elevate knee flexor activation without meaningful improvements in mechanical efficiency. In contrast, the present intervention focused on optimizing coordination and reducing power losses rather than enforcing a prescribed pedaling style, which may explain the selective improvements observed in isokinetic force balance.

Fatigue is another critical factor influencing force production and symmetry during cycling. Previous research has demonstrated that knee joint contributions increase substantially during high-intensity exercise performed to exhaustion (33). Additionally, experienced cyclists tend to exhibit reduced asymmetry at higher intensities, reflecting long-term neuromuscular adaptations (34). These findings support the interpretation that sustained training exposure, rather than short-term interventions, may be required to induce robust and lasting changes in pedaling symmetry and efficiency.

Recent work has also emphasized the importance of coordination between concentric and eccentric muscle actions during cycling. Improved timing between the rectus femoris, vastus medialis, and biceps femoris has been associated with enhanced joint power output under increased workloads (35). Such neuromuscular coordination may represent a more effective target for performance enhancement than symmetry-focused strategies alone. Training approaches that prioritize motor control and inter-muscular coordination may therefore provide a more stable foundation for long-term performance development.

Finally, a systematic review examining the neuromuscular effects of cadence highlighted the need for a deeper understanding of both acute and chronic adaptations to different pedaling strategies (4). The interaction between cadence, workload, and muscle activation further complicates attempts to modify symmetry through isolated mechanical or feedback-based interventions. The present findings align with this perspective, indicating that pedaling technique training may selectively influence neuromuscular characteristics without directly translating to changes in global performance outcomes.

In conclusion, this study demonstrated that an eight-week pedal technique training program induced velocity-specific neuromuscular adaptations in trained young male cyclists. Significant improvements were observed in knee extensor and flexor strength at an angular velocity of 180°/s, whereas no meaningful changes occurred at lower (60°/s) or higher (300°/s) angular velocities. In contrast, the intervention did not result in significant changes in functional threshold power (FTP), pedal asymmetry indices, or bilateral pedal power averages when compared with the control group.

These findings indicate that pedal technique–focused training may enhance joint-level strength and neuromuscular coordination at moderate angular velocities relevant to functional cycling demands, without directly translating into improvements in global aerobic performance. Therefore, pedal technique training should be considered a complementary strategy within comprehensive training programs rather than a primary method for improving endurance performance in young cyclists.