Fatigue Effects on Single-Leg Squat Kinetics and Kinematics in Athletes with Concurrent Flexible Flatfoot and Genu Varum
| Author | Naser Ebrahimi | en |
| Author | Hashem Piri | en |
| Author | Rahman Sheikhhoseini | en |
| Author | Mohammadreza Seyedi | en |
| Author | Ebrahim Ebrahimi | en |
| Author | Seyed Alihossein Nourbakhsh | en |
| Orcid | Naser Ebrahimi [0009-0002-6824-2818] | en |
| Orcid | Hashem Piri [0000-0002-3137-6161] | en |
| Orcid | Rahman Sheikhhoseini [0000-0002-9885-3591] | en |
| Orcid | Mohammadreza Seyedi [0009-0004-2969-2896] | en |
| Orcid | Ebrahim Ebrahimi [0009-0004-2969-2896] | en |
| Orcid | Seyed Alihossein Nourbakhsh [0009-0009-6061-071X] | en |
| Issued Date | 2026-06-30 | en |
| Abstract | Background: Athletes with flexible flatfoot and genu varum are at an increased risk of injury. These deformities alter force distribution and joint kinematics and may affect athletic performance. Objectives: This study aimed to compare the effects of fatigue on lower-limb kinetics and kinematics during the single-leg squat (SLS) task between athletes with and without concomitant flexible flatfoot and genu varum deformities. Methods: This study compared male collegiate athletes with concurrent flexible flatfoot and genu varum (n = 10) with athletes without these conditions (n = 8). Single-leg squat (SLS) kinematics and kinetics were recorded using a 10-camera motion-capture system and a force plate. Flatfoot and genu varum were assessed using Brody's method and calipers. To induce fatigue, participants completed a protocol consisting of 10 single-leg squats, 2 maximal vertical jumps, and 20 step-up repetitions. Data were analyzed using analysis of covariance (ANCOVA) (P < 0.05). Results: No significant differences were observed in joint movement patterns or force-related parameters in any anatomical plane between athletes with concurrent flexible flatfoot and genu varum deformities and those without these conditions (P > 0.05). Conclusions: Fatigue affected SLS execution similarly in both groups, with no significant changes observed in lower-limb joint mechanics or movement patterns, even among athletes whose anatomical alignment predisposes them to musculoskeletal injury. | en |
| DOI | https://doi.org/10.5812/jcrps-172754 | en |
| URI | https://brieflands.com/journals/jcrps/articles/172754 | en |
| Keyword | Kinematics | en |
| Keyword | Kinetics | en |
| Keyword | Fatigue | en |
| Keyword | Athletes | en |
| Publisher | Brieflands | en |
| Title | Fatigue Effects on Single-Leg Squat Kinetics and Kinematics in Athletes with Concurrent Flexible Flatfoot and Genu Varum | en |
| Type | Research Article | en |
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