Residual force enhancement during multi-joint leg extensions at joint- angle configurations close to natural human motion

Paternoster, Florian Kurt; Seiberl, Wolfgang; Hahn, Daniel; Schwirtz, Ansgar

doi:10.1016/j.jbiomech.2016.02.015

Cited by 20 publications

(19 citation statements)

References 39 publications

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“…From a phenomenological perspective the muscular feature is known to be independent of stretch velocity 6 but sensitive to the stretch amplitude 1, 7 . RFE has been proven for the entire force-length relationship 8, 9 and has been verified in in vivo studies for maximum voluntary 10–12 and submaximal voluntary contractions 13–16 , for small 10 and large human muscles 17 as well as for multi-joint movements 11, 14, 15 . Beside the aforementioned lack of knowledge regarding the origin of RFE, especially studies on humans performing voluntary contractions reported a discrepancy between the total number of subjects involved in a study and those who showed enhanced forces after active stretch, referred to as responder vs. non-responder phenomenon 15, 18, 19 .…”

Section: Introductionmentioning

confidence: 77%

Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch

Paternoster

Hahn

Stocker

et al. 2017

Sci Rep

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After an active muscle stretch, maintaining a certain amount of force in the following isometric phase is accompanied by less muscle activation compared to an isometric contraction without preceding active stretch at the corresponding muscle length. This reduced muscle activation might be related to reduced metabolic costs, such as the oxidative metabolism. Hence, the aim of this study was to clarify if mechanisms associated with stretch-induced activation reduction (AR) also influence oxygen consumption of voluntary activated human muscles after active stretch. Plantarflexion torque of 20 subjects was measured during 1) purely isometric and 2) active stretch contractions (26°, 60°/s), at a submaximal torque level of 30% MVC. Oxygen consumption (mO2) of gastrocnemius medialis (GM) was estimated by near-infrared spectroscopy while applying arterial occlusion. Since the overall group did not show AR at GM after active stretch (p > 0.19), a subgroup was defined (n = 10) showing AR of 13.0 ± 10.3% (p = 0.00). However, for both purely isometric and active contractions mO2 was the same (p = 0.32). Therefore, AR triggered by active stretch did not affect mO2 of active human muscle.

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Section: Introductionmentioning

confidence: 77%

Oxygen consumption of gastrocnemius medialis muscle during submaximal voluntary isometric contractions with and without preceding stretch

Paternoster

Hahn

Stocker

et al. 2017

Sci Rep

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“…In addition, movement modality should be mentioned. Some previous studies adopted multi-joint movements instead of single joint movements for examining whether residual force enhancement is observed in human movements (Seiberl et al, 2013; Paternoster et al, 2016) which seems to be more closely-related to human movements. In these situations, not only agonists but also antagonists should be considered.…”

Section: Discussionmentioning

confidence: 99%

“…Recently, Seiberl et al (2013) and Paternoster et al (2016) examined the influence of residual force enhancement on human voluntary multi joint movement, and reported partly conflicting results; the former found statistically-significant residual force enhancement while the latter failed to find statistically-significant residual force enhancement, in other words, responders and non-responders existed. In addition, Lee and Herzog (2002) examined the magnitude of residual force enhancement in human adductor pollicis in both voluntary and electrically-evoked contractions, and reported that significant residual force enhancement was confirmed in both voluntary and electrically-evoked contractions.…”

Section: Introductionmentioning

confidence: 99%

Influence of Joint Angle on Residual Force Enhancement in Human Plantar Flexors

2017

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Compared to pure isometric contractions, isometric muscle force at a given length is larger when the eccentric contraction is conducted before the isometric contraction. This phenomenon is widely known as residual force enhancement, and has been confirmed consistently in isolated muscle experiments. The purpose of this study was to confirm whether residual force enhancement also occurs in human plantar flexors and to examine its joint angle dependence. Eleven men participated in this study. Isometric joint torque was measured in a Control trial (pure isometric contraction) and Residual force enhancement (RFE) trial (isometric contraction after eccentric contraction) at plantar flexion 0° (Short condition) and dorsiflexion 15° (Long condition). Fascicle length and pennation angle of the medial gastrocnemius were measured simultaneously to evaluate the influence of architectural parameters on isometric joint torque. Isometric joint torque observed in the Short condition was not significantly different between the Control and RFE trials (Control: 42.9 ± 8.0 Nm, RFE: 45.1 ± 8.4 Nm) (p = 0.200). In contrast, significant differences in isometric joint torque were observed in the Long condition between Control and RFE trials (Control: 40.5 ± 9.3 Nm, RFE: 47.1 ± 10.5 Nm) (p = 0.001). Fascicle length and pennation angle were not different between Control and RFE trials in the Short and Long conditions. Isometric joint torque was larger when eccentric contraction was conducted before isometric contraction while architectural differences were not observed, indicating that residual force enhancement occurs in human plantar flexors. However, the influence of residual force enhancement may be limited in dorsiflexed positions because the magnitude of residual force enhancement is considered to be prominent in the descending limb (long muscle length condition) and small in the ascending limb (short muscle length condition) where human plantar flexors operate in plantar flexed positions.

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“…t 1 ). However, there is no study on maximum voluntarily activated human muscles examining the duration beyond stretch until a steady state is reached (Hahn et al, 2010), but there is evidence that a steady state could be reached for submaximal contractions (Paternoster et al, 2016;Pinniger and Cresswell, 2007). It should be noted that one subject from each group did not exhibit RFE at t1, t2, and t3 (Fig.…”

Section: Comparison With Literaturementioning

confidence: 95%