The effect of immobilization of the head and trunk on arm-cycling-induced depression of soleus motoneuron pool excitability

Hiraoka, Koichi; Taniguchi, Yoichi

doi:10.3109/08990220903574378

Cited by 4 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aruin and Latash (60) found that when humans perform voluntary arm movement, postural equilibrium suffers because of limb and body geometry changes, reflecting a postural adjustment. Based on these findings, Hiraoka and Taniguchi (61) explored if immobilization of the neck and trunk on arm-cycling induced depression of leg motoneuron pool excitability. They found that the H-reflex depression during arm cycling in the nonimmobilized condition was significantly larger than in the immobilized condition, suggesting a relationship between neck and trunk posture during arm cycling performance.…”

Section: Discussionmentioning

confidence: 99%

The Effects of Load, Crank Position, and Sex on the Biomechanics and Performance during an Upper Body Wingate Anaerobic Test

Antolinez,

Edwards,

Holmes

et al. 2024

Medicine &Amp; Science in Sports &Amp; Exercise

View full text Add to dashboard Cite

Introduction The upper body Wingate Anaerobic Test (WAnT) is a 30-second maximal effort sprint against a set load (percentage of body mass). However, there is no consensus on the optimal load and no differential values for males and females, even when there are well-studied anatomical and physiological differences in muscle mass for the upper body. Our goal was to describe the effects of load, sex, and crank position on the kinetics, kinematics, and performance of the upper body WAnT. Methods Eighteen participants (9 females) performed three WAnTs at 3, 4, and 5% of body mass. Arm crank forces, 2D kinematics, and performance variables were recorded during each WAnT. Results Our results showed an increase of ~49% effective force, ~36% peak power, ~5° neck flexion, and ~ 30° shoulder flexion from 3-5% load (p < .05). Mean power and anaerobic capacity decreased by 15%, with no changes in fatigue index (p < .05). The positions of higher force efficiency were at 12 and 6 o’clock. The least force efficiency occurred at 3 o’clock (p < .05). Sex differences showed that males produced 97% more effective force and 109% greater mean power than females, with 11.7% more force efficiency (p < .001). Males had 16° more head/neck flexion than females, and females had greater elbow joint variability with 17° more wrist extension at higher loads. Males cycled ~32% faster at 3 vs 5% load with a 65% higher angular velocity than females. Grip strength, MVIC, mass, and height positively correlated with peak and mean power (p < .001). Conclusions In conclusion, load, sex, and crank position have a significant impact on performance of the WAnT. These factors should be considered when developing and implementing an upper body WAnT.

show abstract

Section: Discussionmentioning

confidence: 99%

The Effects of Load, Crank Position, and Sex on the Biomechanics and Performance during an Upper Body Wingate Anaerobic Test

Antolinez,

Edwards,

Holmes

et al. 2024

Medicine &Amp; Science in Sports &Amp; Exercise

View full text Add to dashboard Cite

show abstract

“…Feet and arms were attached to the pedals and separate handles with Velcro strips. Trunk movements were not restricted, since it has been demonstrated that neural interlimb coupling is more pronounced with unrestricted head and trunk movements (12).…”

Section: Methodsmentioning

confidence: 99%

Arm movements can increase leg muscle activity during submaximal recumbent stepping in neurologically intact individuals

Kam

Rijken

Manintveld

et al. 2013

Journal of Applied Physiology

View full text Add to dashboard Cite

Facilitation of leg muscle activity by active arm movements during locomotor tasks could be beneficial during gait rehabilitation after spinal cord injury. The present study explored the effects of arm movements on leg muscle activity during submaximal recumbent stepping. Healthy subjects exercised on a recumbent stepping machine both with and without arm movements. Activity of five leg muscles was recorded and compared for stepping with and without arm movements. To determine which arm movements are optimal for leg muscle facilitation, subjects were instructed to step with 1) mechanically coupled vs. decoupled arm and leg movements, 2) synchronous vs. asynchronous arm movements, and 3) at 50 vs. 70 RPM. Leg muscle activity was increased by active arm movements in all muscles, except the vastus lateralis muscle. Activity of other extensors (soleus, medial gastrocnemius, and biceps femoris) was primarily increased during the extension phase, whereas activity of flexors (tibialis anterior) was also increased during the flexion phase. Facilitation was more or less consistent for both frequencies and for synchronous and asynchronous movements. For coupled arm movements, facilitation tended to be diminished or absent. The observed facilitation in the present study is probably of neuromuscular rather than biomechanical origin, since the arms are probably hardly involved in postural control or weight-bearing during recumbent stepping. Further studies in patients should explore the possibility to integrate neuromuscular facilitation in rehabilitation programs.

show abstract

“…Splint immobilization of the forearm is performed in clinical practice for various indications such as post contusion, laceration, sprain, fracture, dislocation, luxation, and inflammation thereby reducing pain and spasms, decreasing swelling and inflammatory response, preventing further tissue damage and facilitating proper healing. In the past, studies focused on immobilization induced effects on osteoblast function and bone mineral content (Jaworski et al, 1980; Jozsa et al, 1988; Kuhr et al, 1982), tendon structure and tendon to bone interface (Aro et al, ; Hettrich et al, ; Nakamae et al, ), muscle content and intramuscular connective tissue morphology (Jozsa et al, ; Homma et al, ), cartilage and collagen turnover (Amiel et al, ; Ghosh et al, ; Sawamura et al, ), and neuromuscular response (Clark et al, ; Hiraoka and Taniguchi, ). By contrast, there are limited data of effects induced by immobilization on the human skin.…”

Section: Introductionmentioning

confidence: 99%

Acute effects of splint immobilization of the forearm on in vivo microcirculation and histomorphology of the human skin

Altıntaş¹,

Vogt

Altintas

2013

Microscopy Res & Technique

View full text Add to dashboard Cite

show abstract

The effect of immobilization of the head and trunk on arm-cycling-induced depression of soleus motoneuron pool excitability

Cited by 4 publications

References 20 publications

The Effects of Load, Crank Position, and Sex on the Biomechanics and Performance during an Upper Body Wingate Anaerobic Test

The Effects of Load, Crank Position, and Sex on the Biomechanics and Performance during an Upper Body Wingate Anaerobic Test

Arm movements can increase leg muscle activity during submaximal recumbent stepping in neurologically intact individuals

Acute effects of splint immobilization of the forearm on in vivo microcirculation and histomorphology of the human skin

Contact Info

Product

Resources

About