scholarly journals Evaluation of the Acupuncture Needling Effect on Post-Exercise Muscle Stiffness by Newly Devised Muscle Hardness Meter

1992 ◽  
Vol 4 (2) ◽  
pp. 135-140 ◽  
Author(s):  
Takao SATO ◽  
Tadashi HISAMITSU ◽  
Michio SATO ◽  
Chifuyu TAKESHIGE
Keyword(s):  
Muscle Stiffness ◽  
Post Exercise ◽  
Muscle Hardness ◽  
Exercise Muscle

scholarly journals Influence of the artificial turf certification on physical performance and muscle damage in football players (QUALTURF PROJECT)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Javier Sanchez-Sanchez ◽  
Jose Luis Felipe ◽  
Antonio Hernandez-Martin ◽  
David Viejo-Romero ◽  
Vicente Javier Clemente-Suarez ◽  
...  
Keyword(s):  
Muscle Damage ◽  
Football Players ◽  
Artificial Turf ◽  
Post Exercise ◽  
Perceived Effort ◽  
Risk Of Injury ◽  
Football Team ◽  
Randomized Design ◽  
Exercise Muscle ◽  
Simulated Match

AbstractThis study aimed to analyse the influence of the FIFA Quality PRO certification of artificial turf pitches on the physical, physiological performance and muscle damage in soccer players. Fifteen healthy male players (21.2 ± 1.4 years; 178.2 ± 4.3 cm; 79.1 ± 8.3 kg) from a university football team were selected to participate in the research. Mechanical properties related to surface–player interaction were assessed on the two surfaces selected for this study. A randomized design was used and the players performed the Ball-sport Endurance and Sprint Test (BEAST90) on the different artificial turf fields. Average time of the 20 m sprints was longer on the FIFA Quality Pro surface than on the non-certified pitch (+ 0.13 s; p < 0.05; CI 95% − 0.01 to 0.27; ES: 0.305). The players’ perceived effort was higher in the first (+ 2.64; p < 0.05; CI 95% 0.92 to 4.35; ES: 1.421) and the second half (+ 1.35; p < 0.05; CI 95% − 0.02 to 2.72; ES: 0.637) of the test on the FIFA Quality Pro field. Comparative analysis between surfaces showed no significant differences in the time spent in each of the heart rate zones and higher concentrations of CK (+ 196.58; p > 0.05; CI 95% 66.54 to 326.61; ES: 1.645) were evidenced in the non-certified pitch surface. In response to a simulated match protocol, markers of post-exercise muscle damage may be reduced on accredited artificial turf fields. These insights can provide the opportunity to maximize the efficiency of training sessions and reduce the risk of injury during the season.

scholarly journals Serum Creatine Kinase Increases after Acute Strength Training in College Athletes with Menstrual Irregularities

Women ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 71-79
Author(s):  
Akemi Sawai ◽  
Risa Mitsuhashi ◽  
Alexander Zaboronok ◽  
Yuki Warashina ◽  
Bryan J. Mathis
Keyword(s):  
Creatine Kinase ◽  
Strength Training ◽  
College Athletes ◽  
Biceps Femoris ◽  
Muscle Stiffness ◽  
Post Exercise ◽  
Tendon Stiffness ◽  
Menstrual Dysfunction ◽  
Menstrual Irregularities ◽  
Biceps Femoris Tendon

Chronic menstrual dysfunction and low female sex hormones adversely affect muscular performance in women but studies in college athletes are scarce. A cohort of 18 Japanese, female college athletes at the University of Tsukuba, Japan, were recruited and studied over 3 weeks under 2 conditions. One group had normal menstrual cycling (CYC, 9 athletes) while the other had irregular cycles (DYS, 9 athletes). Hormones and creatine kinase (CK) were measured from blood under both rest (RE) and exercise (EX) conditions. Biceps femoris tendon stiffness was measured by myometry. No differences in age, height, weight, menarche age, or one-repetition maximum weight existed between the groups. The DYS group had persistently low levels of estrogen and progesterone. In the CYC group, the CK level significantly increased at each point immediately post-exercise and 24 h post-exercise compared to pre-exercise in Weeks 1 and 2, and significantly increased at 24 h post-exercise compared to pre-exercise status in Week 3. The DYS group was significantly different only between pre-exercise and 24 h post-exercise over all 3 weeks. The DYS group also suffered from higher biceps femoris tendon stiffness at 24 h post-exercise. Chronic menstrual irregularities in Japanese college athletes increase muscle damage markers in the bloodstream and muscle stiffness after acute strength training.

scholarly journals Histamine H1 and H2 receptors are essential transducers of the integrative exercise training response in humans

2021 ◽  
Vol 7 (16) ◽  
pp. eabf2856
Author(s):  
Thibaux Van der Stede ◽  
Laura Blancquaert ◽  
Flore Stassen ◽  
Inge Everaert ◽  
Ruud Van Thienen ◽  
...  
Keyword(s):  
Exercise Training ◽  
Vascular Function ◽  
Metabolic Diseases ◽  
Interval Training ◽  
Whole Body ◽  
Post Exercise ◽  
Muscle Perfusion ◽  
Interval Exercise ◽  
Training Response ◽  
Exercise Muscle

Exercise training is a powerful strategy to prevent and combat cardiovascular and metabolic diseases, although the integrative nature of the training-induced adaptations is not completely understood. We show that chronic blockade of histamine H1/H2 receptors led to marked impairments of microvascular and mitochondrial adaptations to interval training in humans. Consequently, functional adaptations in exercise capacity, whole-body glycemic control, and vascular function were blunted. Furthermore, the sustained elevation of muscle perfusion after acute interval exercise was severely reduced when H1/H2 receptors were pharmaceutically blocked. Our work suggests that histamine H1/H2 receptors are important transducers of the integrative exercise training response in humans, potentially related to regulation of optimal post-exercise muscle perfusion. These findings add to our understanding of how skeletal muscle and the cardiovascular system adapt to exercise training, knowledge that will help us further unravel and develop the exercise-is-medicine concept.

scholarly journals Impacts of DigestaWell NRG Supplementation on Post Exercise Muscle Soreness in Unconditioned Horses, a Pilot Study

2021 ◽  
Vol 101 ◽  
pp. 103455
Author(s):  
Jessica K. Suagee-Bedore ◽  
Yeting Shen ◽  
Shea Porr ◽  
Ivan D. Girard ◽  
Karen Bennett-Wimbush ◽  
...  
Keyword(s):  
Pilot Study ◽  
Muscle Soreness ◽  
Post Exercise ◽  
Exercise Muscle

scholarly journals Sporting myths: the REAL role of lactate during exercise

2016 ◽  
Vol 19 (5) ◽  
Author(s):  
T Mann
Keyword(s):  
Lactate Concentration ◽  
Lactate Production ◽  
Blood Lactate Concentration ◽  
Endurance Performance ◽  
Post Exercise ◽  
Early Exercise ◽  
Important Intermediate ◽  
Lactate Formation ◽  
Exercise Muscle

Background. Lactate or, as it was customarily known, ‘lactic acid’ was one of the first molecules to attract the attention of early exercise scientists, mainly because blood lactate concentration could be measured and was shown to increase with increasing exercise intensity. This connection resulted in lactate being associated with numerous other events associated with high-intensity exercise including muscle cramps, fatigue, acidosis and post-exercise muscle soreness. Nobel prize-winning research by AV Hill and Otto Meyerhof provided a rational explanation linking lactate to anaerobiosis and acidosis, which resulted in this relationship being widely accepted as fact. It was only following isotopic tracer studies of George Brooks and others that the true role of lactate during rest and exercise was revealed. Conclusions. Lactate is now acknowledged as an important intermediate of carbohydrate metabolism, taken up from the blood by tissues such as skeletal and cardiac muscle as a substrate for oxidation. Furthermore, lactate formation consumes a proton, thereby buffering against muscle acidosis. For this reason, lactate production forms an essential aid to endurance performance rather than a hindrance.

scholarly journals Ultrafast Ultrasound-Derived Muscle Strain Measure Correlates with Carotid Local Pulse Wave Velocity in Habitual Resistance-Trained Individuals

2021 ◽  
Vol 11 (18) ◽  
pp. 8783
Author(s):  
Hsin-Fu Lin ◽  
Yi-Hung Liao ◽  
Pai-Chi Li
Keyword(s):  
Pulse Wave Velocity ◽  
Resistance Exercise ◽  
Strain Rate ◽  
Wave Velocity ◽  
Exercise Intensity ◽  
Pulse Wave ◽  
Muscle Stiffness ◽  
Ultrasound Elastography ◽  
Muscle Strain ◽  
Post Exercise

Purpose: this study investigated the effects of the intensity of machine-based bicep curl resistance exercise on ultrafast ultrasound-derived muscle strain rate and carotid ultrafast pulse wave velocity (ufPWV), and examined the association between muscle strain rate, ufPWV, and established carotid function measures in habitual resistance-trained individuals. Methods: twenty-three young habitual resistance-trained males (age: 24 ± 1 year, body mass index = 24 ± 1 kg/m2) were recruited to participate in two bouts of acute bicep curl exercise. After one-repetition maximum determination (1RM), the participants were randomly assigned to engage in bicep curls at 40 or 80%1RM intensity (10 reps × five sets) by a crossover study design. The muscle strain rate of bicep muscle, carotid ufPWV during systole(ufPWV-sys), and diastole (ufPWV-dia) were obtained pre- and post-exercise. In addition, carotid function measures were calculated by obtained carotid diameter and central blood pressure changes. Results: compared with pre-exercise, the reduction in post-exercise muscle strain rate and its area under the curve of 80%1RM was greater than those of 40%1RM. Both ufPWV-sys and ufPWV-dia increased regardless of exercise intensity. Baseline bicep muscle strain rate correlated not only with ufPWV-sys (r = −0.71, p = 0.001), ufPWV-dia (r = −0.74, p = 0.001), but also carotid compliance (r = 0.49, p = 0.02), distensibility (r = 0.54, p = 0.01) and ß stiffness (r= −0.84, p < 0.0001). The ufPWVs also correlated with ß stiffness (r = 0.64–0.76, p = 0.01). Conclusion: muscle stiffness measured by ultrafast ultrasound elastography increases positively with resistance exercise intensity, and it appears to correlate with carotid ufPWV and established carotid function measures in habitual resistance-trained individuals.

152 Comparison of an Antioxidant Source and Antioxidant Plus BCAA on Athletic Performance and Post Exercise Recovery of Horses

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 80-81
Author(s):  
Tanja Hess ◽  
Emily Kent ◽  
Renan Regatieri Casagrande ◽  
Christine Levihn ◽  
Grace Romo ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Protein Synthesis ◽  
Mixed Model ◽  
Muscle Protein ◽  
Muscle Protein Synthesis ◽  
Time Effect ◽  
Post Exercise ◽  
Threshold Test ◽  
Branched Chain ◽  
Exercise Muscle

Abstract Antioxidant supplementation has been shown to decrease post exercise oxidative stress but can lead to decreased post-exercise muscle protein synthesis. The objective of this study was to compare the effects of the supplementation with a control feed with low antioxidant content (CONT) to a high antioxidant feed (AO), versus a high antioxidant and branched chain amino acid feed (BCAO) on post-exercise protein synthesis and oxidative stress. Our hypothesis is that supplementing AO with BCAO will reduce oxidative stress without hindering muscle protein synthesis. Eighteen mixed breed conditioned polo horses were assigned to one of the three treatments. All horses consumed CONT for 30 days and were then submitted to a lactate threshold test (LT). One hour after this and all LT, each group was assigned and given their treatments. LT were done at 15 and 30 days of supplementation. Blood was collected before, two and four hours after LT, and analyzed for oxidative stress based on glutathione peroxidase, superoxide dismutase and malondialdehyde concentrations by ELISA. Muscle biopsies were taken before and 4 hours after LT and analyzed for the expression of protein synthesis by RT-PCR. Results were analyzed in a mixed model by ANOVA and compared by LSM. A reduction of oxidative stress was found over time (P &lt; 0.050) with no treatment effect (P &gt;0.50). An upregulation of protein synthesis after exercise was found for muscle primers CD36, CPT1, DK4, MyF5, and Myogenin (P &lt; 0.050). There was a treatment by time effect for MyoD (P = 0.027), where AO was upregulated the most after exercise compared to BCAO and CONT. DK4 had a treatment by time effect trend (P = 0.073), where AO and BCAO were upregulated and CONT was unchanged after exercise. This study demonstrated post exercise muscle synthesis with no advantage of AO plus BCAO compared to AO.

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