Effects of Nordic hamstring exercise combined with glider exercise on hip flexion flexibility and hamstring passive stiffness

Effects of Eccentric Resistance Training on Lower-Limb Passive Joint Range of Motion: A Systematic Review and Meta-analysis

“…A final subgroup analysis was conducted to examine the effect of eccentric contraction mode (i.e., isotonic or isokinetic) on ROM outcomes. A noticeable but nonsignificant difference in magnitude of change was observed, with a large effect after isokinetic (g = 1.07) (27,38,40,50,51) and moderate effect after isotonic (g = 0.77) (26,28,39,41,42,(44)(45)(46)48,49,52,53) eccentric training, indicating that isokinetic training may evoke a superior, albeit nonsignificantly greater, increase in ROM under some conditions. However, closer analysis of the number of exposures revealed that isotonic studies averaged 23.9 sessions, whereas isokinetic studies included only 11.5 sessions.…”

“…Regarding training duration and frequency, training program durations within the 17 studies ranged from 4 to 14 wk, which enabled the temporal changes in ROM to be explored. A moderate effect ( g = 0.63) was calculated after shorter duration studies (4–5 wk) (38,40,44,45,48), which increased to a large effect ( g = 0.98) after 6–8 wk (26–28,40–42,49–53). However, as program duration increased further (9–14 wk) (38–40,46), a moderate effect ( g = 0.75) was calculated.…”

“…To further explore potential dose-response relations, studies were grouped by total number of exposures. Where studies included a limited number of training sessions (4-9 exposures) (38,40,51), a medium effect was calculated (g = 0.66), which increased to a large effect after 11-20 sessions (g = 0.80) (26)(27)(28)40,44,46,(48)(49)(50)53) and then remained large after 23-42 sessions (g = 1.04) (39)(40)(41)45,52). Given the substantial differences in training duration and, possibly more importantly, the differences in weekly sessions completed between studies, these data highlight the importance of closely examining both program duration and weekly frequency to ensure conclusions drawn from meta-analyses are robust.…”

“…Similar effect sizes were detected in knee extension (g = 0.83) and hip flexion (g = 0.78), and as they measure the effect of training on the hamstrings group, these studies were pooled. Large effect sizes were calculated in both dorsiflexion (g = 1.12) (27,(39)(40)(41)45) and hip flexion/knee extension (g = 0.82) (26,28,42,44,46,49,52,53), whereas only a small effect was calculated for knee flexion (g = 0.41) (38,48,50,51). Although subgroup analysis revealed a significant difference between dorsiflexion and knee flexion, indicative of disparate effects across muscle groups, the number of exposures in studies that examined knee flexion averaged only 9.4 sessions, whereas studies testing dorsiflexion and knee extension imposed 22.2 and 17.8 sessions, respectively.…”

Efectividad de los ejercicios nórdicos sobre la incidencia de lesiones de isquiotibiales en futbolistas profesionales y amateur masculinos entre los 15 y 41 años. Revisión sistemática

“…Se ha sugerido que el entrenamiento excéntrico produce un aumento de la longitud y la fuerza de este grupo 2022;11(3): 47-65 muscular favoreciendo el correcto desarrollo de la práctica deportiva (13). Adicionalmente, se ha demostrado que el entrenamiento excéntrico ayuda a aumentar el ROM de flexión de cadera, lo que se puede traducir en una mayor tolerancia al estiramiento muscular (14). Sin embargo, los protocolos de prevención de lesiones de isquiotibiales actuales como el FIFA 11 emplean diferentes estrategias en las que se incluyen diversos tipos de ejercicios, entre ellos los ejercicios nórdicos que, al no reproducir claramente las condiciones funcionales de estos músculos, podrían generar confusión sobre los verdaderos efectos de estos ejercicios (15).…”