COMPARATIVE STUDY
JOURNAL ARTICLE

Motion alterations after anterior cruciate ligament reconstruction: comparison of the injured and uninjured lower limbs during a single-legged jump

Benoît Pairot de Fontenay, Sebastien Argaud, Yoann Blache, Karine Monteil
Journal of Athletic Training 2014, 49 (3): 311-6
24840584

CONTEXT: Asymmetries subsist after anterior cruciate ligament reconstruction (ACL-R), and it is unclear how lower limb motion is altered in the context of a dynamic movement.

OBJECTIVE: To highlight the alterations observed in the injured limb (IL) during the performance of a dynamic movement after ACL-R.

DESIGN: Cross-sectional study.

SETTING: Research laboratory.

PATIENTS OR OTHER PARTICIPANTS: A total of 11 men (age = 23.3 ± 3.8 years, mass = 81.2 ± 17.0 kg) who underwent ACL-R took part in this study 7.3 ± 1.1 months (range = 6-9 months) after surgery.

INTERVENTION(S): Kinematic and kinetic analyses of a single-legged squat jump were performed. The uninjured leg (UL) was used as the control variable.

MAIN OUTCOME MEASURE(S): Kinematic and kinetic variables.

RESULTS: Jump height was 24% less for the IL than the UL (F1,9 = 23.3, P = .001), whereas the push-off phase duration was similar for both lower limbs (P = .96). Knee-joint extension (F₁,₉ = 11.4, P = .009), and ankle plantar flexion (F₁,₉ = 22.6, P = .001) were less at takeoff for the IL than the UL. The hip angle at takeoff was not different between lower limbs (P = .09). We found that total moment was 14% less (F₁,₉ = 11.1, P = .01) and total power was 35% less (F₁,₉ = 24.2, P = .001) for the IL than the UL. Maximal hip (P = .09) and knee (P = .21) power was not different between legs. The IL had 34% less maximal ankle power (F₁,₉ = 11.3, P = .009) and 31% less angular velocity of ankle plantar flexion (F₁,₉ = 17.8, P = .004) than the UL.

CONCLUSIONS: At 7.3 months after ACL-R, motion alterations were present in the IL, leading to a decrease in dynamic movement performance. Enhancing the tools for assessing articular and muscular variables during a multijoint movement would help to individualize rehabilitation protocols after ACL-R.

Full Text Links

Find Full Text Links for this Article

Discussion

You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Remove bar
Read by QxMD icon Read
24840584
×

Save your favorite articles in one place with a free QxMD account.

×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"