scholarly journals Effect of Acupuncture on Timeliness of Male Shoulder Joint Endurance

2021 ◽  
Vol 18 (11) ◽  
pp. 5638
Author(s):  
I-Lin Wang ◽  
Rui Hu ◽  
Yi-Ming Chen ◽  
Che-Hsiu Chen ◽  
Jun Wang ◽  
...  
Keyword(s):  
Athletic Performance ◽  
Shoulder Joint ◽  
Average Power ◽  
Endurance Performance ◽  
Muscle Endurance ◽  
Healthy Male ◽  
Maximum Torque ◽  
Average Work ◽  
Explosive Force ◽  
Stimulation Of

Acupuncture as a traditional and commonly used treatment has been used to improve the performance of athletes. In the improvement of female shoulder joint explosive force and muscle endurance also has an immediate effect. However, whether the effect of acupuncture therapy can be maintained after improving athletic performance still worth further discussion. The purpose of this study was to explore the timeless of the physical neurophysiological response induced by acupuncture at specific acupoints in improving endurance performance. Seventeen healthy male participants completed six groups of shoulder joint isokinetic exercises. The isokinetic exercise completed in the first group was taken as the baseline. After acupuncture for 15 min, the following 5 isokinetic experiments were completed. Acupuncture acupoints included Binao (LI14), Jianliao (SJ14), Naohui (SJ13), Zhongfu (LU1), Xiabai (LU4), Tianfu (LU3) and Xiaoluo (SJ12). The results show that acupuncture can improve physical performance for 10–20 min. After acupuncture, the maximum torque, average power, average work and total work values significantly increased (p < 0.05). Stimulation of acupoints can effectively improve the performance of periarticular muscle endurance around the shoulder, but this improvement is limited by time.

scholarly journals Effects of Acupuncture on Explosive Force Production by the Healthy Female Shoulder Joint

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
I-Lin Wang ◽  
Yi-Ming Chen ◽  
Jun Wang ◽  
Rui Hu ◽  
Ke-Ke Zhang ◽  
...  
Keyword(s):  
Shoulder Joint ◽  
Force Production ◽  
Maximum Speed ◽  
Maximum Torque ◽  
Shoulder Muscles ◽  
Potentiation Effect ◽  
Average Maximum ◽  
Significant Difference ◽  
Before And After ◽  
Explosive Force

Background. Acupuncture is often used to treat chronic conditions, such as pain. In recent years, given the importance of the explosive forces generated by shoulder muscles for the completion of motor tasks, studies in which nerves were stimulated through acupuncture to increase the explosive forces were conducted. This study explored the effect of acupuncture on explosive force production by the muscles of the female shoulder joint. Methods. Eighteen healthy women underwent shoulder adduction (Add), abduction (Abd), flexion (Flex), and extension (Ext) tests with an isokinetic measurement system. Acupuncture was used to stimulate the Zhongfu (LU1), Tianfu (LI3), Xiabai (LU4), Binao (LI14), Naohui (SJ13), Jianliao (SJ14), and Xiaoluo (SJ12) points, and electromyography (EMG) signals were recorded before and after acupuncture. Results. After acupuncture, there was a significant difference in the average maximum work, the average maximum power, the average maximum speed, the total work in Add/Abd and Flex/Ext, the EMG signals, and the stiffness of the muscles in Abd and Ext ( P < 0.05 ). There were no significant differences in the average maximum torque in Abd or Flex. Conclusion. Based on the results, there may be a significant correlation between the manipulation of different acupoints by acupuncture and the average maximum torque and stiffness. Acupuncture may stimulate nerves to activate muscles and induce a postactivation potentiation effect that improves explosive force production. Therefore, acupuncture as an auxiliary tool may increase the explosive forces generated by acupoint-related muscles by stimulating nerves.

scholarly journals Effect of Acupuncture on Muscle Endurance in the Female Shoulder Joint: A Pilot Study

2020 ◽  
Vol 2020 ◽  
pp. 1-8 ◽  
Author(s):  
I.-Lin Wang ◽  
Yi-Ming Chen ◽  
Rui Hu ◽  
Jun Wang ◽  
Zheng-Bin Li
Keyword(s):  
Shoulder Joint ◽  
Sagittal Plane ◽  
Average Power ◽  
Frontal Plane ◽  
Motor Units ◽  
Muscle Endurance ◽  
Acupuncture Points ◽  
Athletic Ability ◽  
Average Maximum ◽  
Flexion Extension

Shoulder joint dysfunction is the leading cause of decreased athletic ability in athletes. Shoulder joint sports injuries affect the athletic performance of athletes. Improvements in the muscle endurance of the shoulder joint can reduce the incidence of shoulder joint dysfunction. Acupuncture has been an important part of Asian culture for a long time. In acupuncture, nerves are stimulated, inducing postactivation potentiation (PAP) in the body’s motor units and enhancing muscle strength. In this research, 20 female participants with full flexion/extension and adduction/abduction ranges of motion in the shoulder joint during isokinetic exercises underwent stimulation of the following acupuncture points in the shoulder joint: Binao (LI14), Jianyu (LI15), Jianliao (SJ14), Naohui (SJ13), Yuzhong (KI26), Zhongfu (LU1), Yunmen (LU2), Xiabai (LU4), Chize (LU5), Tianfu (LU3), and Xiaoluo (SJ12). In the study, there were significant increases after acupuncture in the average maximum torque in flexion, extension, and adduction; the average work in flexion/extension and adduction/abduction; the average power in flexion/extension and adduction/abduction; the total work in flexion/extension and adduction/abduction; the total net sagittal-plane work (flexion + extension); and the total net frontal-plane work (adduction + abduction) (P<0.05). The average maximum abduction torque did not increase significantly, potentially due to antagonistic forces of muscles. Therefore, acupuncture at acupoints around the shoulder joint can increase muscle excitability, thereby delaying muscle fatigue and increasing muscle endurance.

scholarly journals Effect of Acupuncture on the Timeliness of Explosive Forces Generated by the Male Shoulder Joint

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
I-Lin Wang ◽  
Jun Wang ◽  
Yi-Ming Chen ◽  
Rui Hu ◽  
Yu Su ◽  
...  
Keyword(s):  
Shoulder Joint ◽  
Sports Medicine ◽  
Muscle Force ◽  
Alternative Therapy ◽  
Average Power ◽  
Force Production ◽  
Sports Performance ◽  
Flexion Extension ◽  
Before And After ◽  
Explosive Force

Athletes aim to improve muscle strength to optimize sports performance and gain a competitive edge. Although modern sports medicine includes rehabilitation treatment methods for improving the explosive force of athletes, including acupuncture, a common alternative therapy, research on the effectiveness of acupuncture in improving the timeliness of explosive forces is limited. There is uncertainty regarding how long the effects of acupuncture treatment persist after treatment. Therefore, the purpose of this study was to explore the effect of acupuncture on the timeliness of explosive forces generated by the male shoulder joint. Eighteen healthy men underwent tests of shoulder adduction/abduction (Add/Abd) and flexion/extension (Flex/Ext) through an isokinetic measurement system. Acupuncture was used to stimulate LU1 (Zhongfu), LU3 (Tianfu), LU4 (Xiabai), LI14 (Binao), SJ13 (Naohui), SJ14 (Jianliao), and SJ12 (Xiaoluo), and the isokinetic parameters were recorded before and after acupuncture. After acupuncture, isokinetic muscle force parameters including the maximum (Max) torque, the average power, the average peak power, the average work, and the total work increased significantly ( P < 0.05 ), whereas the average max torque Abd/Flex did not. Additionally, the preintervention values of the shoulder joints for Add/Abd and Flex/Ext were significantly greater than those at post 1 and post 2 ( P < 0.05 ). The isokinetic results suggest that acupuncture can increase the explosive force of the male shoulder joint Add/Abd and Flex/Ext. Muscle cannot be fully activated when calcium saturation is below the maximal level. In this case, the postactivation potentiation (PAP) may enhance voluntary muscle force production. The effect of acupuncture is time-dependent, that is, the effects of acupuncture gradually weaken and disappear by approximately 10 minutes after acupuncture. Therefore, we suggest that acupuncture is used as an alternative therapy in sports competitions to increase the explosive forces of the shoulder joint, thereby improving sports performance.

Effect of multiple oral doses of androgenic anabolic steroids on endurance performance and serum indices of physical stress in healthy male subjects

2006 ◽  
Vol 98 (4) ◽  
pp. 329-340 ◽  
Author(s):  
Norbert Baume ◽  
Yorck Olaf Schumacher ◽  
Pierre-Edouard Sottas ◽  
Carlo Bagutti ◽  
Michel Cauderay ◽  
...  
Keyword(s):  
Anabolic Steroids ◽  
Endurance Performance ◽  
Physical Stress ◽  
Healthy Male ◽  
Androgenic Anabolic Steroids ◽  
Oral Doses ◽  
Male Subjects

scholarly journals The Effect of 1,3-Butanediol on Cycling Time-Trial Performance

2019 ◽  
Vol 29 (5) ◽  
pp. 466-473 ◽  
Author(s):  
David M. Shaw ◽  
Fabrice Merien ◽  
Andrea Braakhuis ◽  
Daniel Plews ◽  
Paul Laursen ◽  
...  
Keyword(s):  
Steady State ◽  
Body Mass ◽  
Repeated Measures ◽  
Average Power ◽  
Gastrointestinal Symptoms ◽  
Time Trial ◽  
Endurance Performance ◽  
Carbon Dioxide Production ◽  
Serum Glucose ◽  
Cycling Time Trial

This study investigated the effect of the racemic β-hydroxybutyrate (βHB) precursor, R,S-1,3-butanediol (BD), on time-trial (TT) performance and tolerability. A repeated-measures, randomized, crossover study was conducted in nine trained male cyclists (age, 26.7 ± 5.2 years; body mass, 69.6 ± 8.4 kg; height, 1.82 ± 0.09 m; body mass index, 21.2 ± 1.5 kg/m2; VO2peak,63.9 ± 2.5 ml·kg−1·min−1; Wmax, 389.3 ± 50.4 W). Participants ingested 0.35 g/kg of BD or placebo 30 min before and 60 min during 85 min of steady-state exercise, which preceded a ∼25- to 35-min TT (i.e., 7 kJ/kg). The ingestion of BD increased blood D-βHB concentration throughout exercise (0.44–0.79 mmol/L) compared with placebo (0.11–0.16 mmol/L; all p < .001), which peaked 1 hr following the TT (1.38 ± 0.35 vs. 0.34 ± 0.24 mmol/L; p < .001). Serum glucose and blood lactate concentrations were not different between trials (all p > .05). BD ingestion increased oxygen consumption and carbon dioxide production after 20 min of steady-state exercise (p = .002 and p = .032, respectively); however, no further effects on cardiorespiratory parameters were observed. Within the BD trial, moderate to severe gastrointestinal symptoms were reported in five participants, and low levels of dizziness, nausea, and euphoria were reported in two participants. However, this had no effect on TT duration (placebo, 28.5 ± 3.6 min; BD, 28.7 ± 3.2 min; p = .62) and average power output (placebo, 290.1 ± 53.7 W; BD, 286.4 ± 45.9 W; p = .50). These results suggest that BD has no benefit for endurance performance.

Self-Regulatory Strength Depletion and Muscle-Endurance Performance: A Test of the Limited-Strength Model in Older Adults

2011 ◽  
Vol 19 (3) ◽  
pp. 177-188 ◽  
Author(s):  
Steven R. Bray ◽  
Kathleen A. Martin Ginis ◽  
Jennifer Woodgate
Keyword(s):  
Older Adults ◽  
Self Regulation ◽  
Endurance Performance ◽  
Muscle Endurance ◽  
Control Group ◽  
Strength Model ◽  
Isometric Handgrip ◽  
Performance Tasks ◽  
Cognitive Depletion ◽  
Aging Muscle

Self-regulation consumes a form of strength or energy. The authors investigated aftereffects of self-regulation depletion on muscle-endurance performance in older adults. Participants (N= 61, mean age = 71) were randomized to a self-regulation-depletion or control group and completed 2 muscle-endurance performance tasks involving isometric handgrip squeezing that were separated by a cognitive-depletion task. The depletion group showed greater deterioration of muscle-endurance performance than controls,F(1, 59) = 7.31,p= .009. Results are comparable to those of younger adults in a similar study and support Baumeister et al.’s limited-strength model. Self-regulation may contribute to central-nervous-system fatigue; however, biological processes may allow aging muscle to offset depletion of self-regulatory resources affecting muscle-endurance performance.

scholarly journals Sprint and endurance power and ageing: an analysis of master athletic world records

2008 ◽  
Vol 276 (1657) ◽  
pp. 683-689 ◽  
Author(s):  
Jörn Rittweger ◽  
Pietro Enrico di Prampero ◽  
Nicola Maffulli ◽  
Marco V Narici
Keyword(s):  
Athletic Performance ◽  
Endurance Performance ◽  
Metabolic Power ◽  
Master Athletes ◽  
World Record ◽  
Running Speed ◽  
Record Data ◽  
Per Se ◽  
Scientific Results ◽  
World Records

Human physical performance is notably reduced with ageing. Although the effects of ageing are often compounded by disuse, the study of master athletes provides an opportunity for investigating the effects of ageing per se . It is often held that sprinting is more affected than endurance performance. However, past analyses of master athletic world record data have yielded opposite observations. We argue here that our understanding of these data improves by considering how, biomechanically, metabolic power is related to athletic performance. In line with earlier studies, our analysis showed that running speed declines with age in a more pronounced way for endurance events than for sprinting events, confirming former studies. However, when assessing the metabolic power required to achieve the running world records, sprint and endurance events show a relatively uniform decline with age across the different events. This study has reconciled formerly conflicting scientific results and improves our understanding of the ageing process. However, it is unclear as to which are the governing mechanisms that cause the different systems in our body, responsible for sprinting and for endurance performance, to be affected by ageing in a remarkably uniform way.

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