Changes in muscle torque following anterior cruciate ligament reconstruction: A comparison between hamstrings and patella tendon graft procedures on 45 patients

Ability of a new hop test to determine functional deficits after anterior cruciate ligament reconstruction

“…In accordance with this, persistent quadriceps weakness seems to be common in the ACL-reconstructed leg despite "aggressive" rehabilitation [2,3,8,11,16,20,22,24,30,34]. In a recent study, Carter and Edinger [8] were intrigued to find that only half of the competitive athletes in their study had accomplished 80% or greater leg strength of the ACL-operated leg by 6 months after surgery, as it is customary to allow return to full activities at that time, with some authors advocating return to sports as early as 4 months after the procedure [9,17].…”

“…This is in accordance with the results of Hennessy and Watson [15], who noted high reliability for the 1-RM test for the bench press and the barbell squat exercise (r=0.96 and 0.97 respectively) in healthy subjects. Although the isotonic 1-RM test is the most frequently-used tool for the evaluation of muscle strength in sports [21], strength in knee rehabilitation is almost always evaluated with isokinetic dynamometry [2,3,7,8,9,16,20,23,24,31,34]. However, according to several studies [4,28,33], isokinetic tests are not sensitive to isotonic weight-training strength improvements.…”

Return to play following ACL reconstruction: a systematic review about strength deficits

“…Nineteen of these studies compared patients with a patellar tendon autograft to patients with a hamstring tendon autograft [2,3,11,12,14,15,20,27,33,35,41,44,50,51,53,75,79]. Seven of these studies showed that after 12-24 months after ACL reconstruction patients with BPTB graft showed a greater deficit in extensor muscle strength and lower deficit in flexor muscle strength compared with patients with HST and vice versa.…”

“…One study found that after 6 months ACLinjured participants had the same isokinetic knee extensor and -flexor strength than control participants. Several studies reported that the mean isokinetic strength deficit for knee flexors or extensors decreased from surgery to 6 months postoperatively, with the highest measured deficit occurring at 6 months postoperatively [3,7,15,39,53,75,79].…”

Confiabilidade e validade de um dinamômetro isométrico modificado na avaliação do desempenho muscular em indivíduos com reconstrução do ligamento cruzado anterior

“…Os valores médios de déficits encontrados nos grupos GTP e GTF são similares aos encontrados em trabalhos que analisaram déficits do torque extensor no período de seis a sete meses de pós-operatório, com valores médios de déficit permanecendo entre 24.6% e 37% para técnicas de enxerto do tendão patelar e entre 21,6% e 26% para técnicas de enxerto dos tendões flexores (25,26) Na análise do torque flexor intergrupos pode-se observar de maneira geral que o grupo GTF apresentou média de déficits maior que a do GTP em todos os quatro testes; no entanto,o valor de p foi estatisticamente significativo apenas no teste realizado no DIM (8,38 ± 16,34 contra -1,42 ± 13,96, respectivamente). Os valores médios de déficits encontrados nos grupos GTP e GTF são similares aos de trabalhos que analisaram déficits do torque flexor no pós-operatório, com valores médios de déficit permanecendo entre -1 e 6% para técnicas de enxerto do tendão patelar e entre 3% e 10% para técnicas de enxerto dos tendões flexores (26)(27)(28) . Não houve diferenças entre os grupos GTF e GC em todos os testes realizados.…”