Consequences of Complete ACL Ruptures

Barber-Westin, Sue D.; Noyes, Frank R.

doi:10.1007/978-3-662-56558-2_2

Cited by 1 publication

(3 citation statements)

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“…Movement patterns during physical activity may place individuals in repetitive and compromised positions that can result in acute knee injuries, such as anterior cruciate ligament (ACL) sprains, or chronic overuse injuries, such as patellofemoral pain syndrome (PFPS) and osteoarthritis. Approximately 70% of ACL injuries are the result of non-contact mechanisms (4). Nearly half of noncontact injuries to the ACL reportedly occur while in dynamic knee valgus (21), a position defined by excessive femoral adduction coinciding with excessive tibial abduction while the foot is fixed to the ground, resulting in medial knee motion during movement (34).…”

Section: Introductionmentioning

confidence: 99%

“…Females demonstrate a considerably larger risk of suffering ACL-related injuries, with acute injury prevalence occurring 2–6 times more often than men depending on the age, sport, and activity level of the individual (4). Patellofemoral pain syndrome rates are also 2.23 times higher in females than males (7).…”

Section: Introductionmentioning

confidence: 99%

“…Patellofemoral pain syndrome rates are also 2.23 times higher in females than males (7). Although the mechanisms of gender-related knee injury risk are unclear, the current literature suggests that this risk is multifactorial (4,22,28,30,40) including anatomical differences, such as pelvic width (30), hormonal differences due to the menstrual cycle (4,22), and biomechanical patterns during activity (28,40). For example, active females are prone to landing from jumps in low flexion positions with higher anterior tibial sheer force (28), and they also display a significantly higher percentage of maximum voluntary isometric contraction (%MVIC) of their quadriceps and significantly lower %MVIC of the hamstrings during jump landings compared with males (18,40).…”

Section: Introductionmentioning

confidence: 99%

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Acute Effect of Dynamic and Gluteal Resistance Exercise Warm-up Protocols on Jump Landing Mechanics in College-Aged Females

Rauseo,

Feairheller,

LaRoche

et al. 2023

Journal of Strength and Conditioning Research

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Rauseo, ML, Feairheller, DL, LaRoche, DP, and Cook, SB. Acute effect of dynamic and gluteal resistance exercise warm-up protocols on lower-extremity jump landing mechanics in college-aged females. J Strength Cond Res XX(X): 000–000, 2023—Inadequate neuromuscular control of the femur by the gluteal musculature is associated with noncontact and overuse injuries to the knee. Acute bouts of resistance exercises targeting the gluteal musculature can be prescribed as part of a warm-up protocol with the goal of improving subsequent neuromuscular control and performance. The purpose of this study was to determine the effect that a warm-up protocol including moderate-intensity gluteal resistance exercises (GRE) has on single leg jump landing biomechanics. Seventeen healthy, college-aged, recreationally active females (mean ± SD; age = 21.4 ± 1.9 years; height = 166.9 ± 5.7 cm; body mass = 62.5 ± 7.4 kg) performed 3 single leg hop trials per leg after completing no warm-up (CON), a dynamic warm-up (DWU), and a dynamic warm-up with gluteal resistance exercises (DWU + GRE) across 3 laboratory visits. Lower extremity kinetic and kinematic variables were assessed during single leg hops from the point of initial foot contact to deepest knee flexion. Biomechanical differences between dominant and nondominant limb landings were also assessed. Dominant limb hip internal rotation angle after DWU + GRE (2.03 ± 9.92°) was significantly greater (p ≤ 0.05) compared with CON (−3.36 ± 7.74°). Peak knee adduction moment (56.8%), peak knee flexion angle (5.7%), and peak knee external rotation angle (17.0%) were significantly greater (p ≤ 0.017) in the dominant limb, compared with the nondominant limb, across warm-up protocols. The combined DWU + GRE warm-up protocol did not have a substantial impact on landing biomechanics. Clinicians prescribing GRE before activity should not expect significant changes in movement patterns after a single bout.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%