INFLUENCE OF SURFACE ON MUSCLE DAMAGE AND SORENESS INDUCED BY CONSECUTIVE DROP JUMPS

This study investigated possible differences using the same stretch-shortening exercise (SSE) protocol on generally accepted monitoring markers (dependent variables: changes in creatine kinase, muscle soreness, and voluntary and electrically evoked torque) in males across three lifespan stages (childhood versus adulthood versus old age). The protocol consisted of 100 intermittent (30 s interval between jumps) drop jumps to determine the repeated bout effect (RBE) (first and second bouts performed at a 2-week interval). The results showed that indirect symptoms of exercise-induced muscle damage after SSE were more expressed in adult males than in boys and elderly males, suggesting that the muscles of boys and elderly males are more resistant to exercise-induced damage than those of adult males. RBE was more pronounced in adult males than in boys and elderly males, suggesting that the muscles of boys and elderly males are less adaptive to exercise-induced muscle damage than those of adult males.

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Beetroot juice is more beneficial than sodium nitrate for attenuating muscle pain after strenuous eccentric-bias exercise

Applied Physiology Nutrition and Metabolism ◽

10.1139/apnm-2017-0238 ◽

2017 ◽

Vol 42 (11) ◽

pp. 1185-1191 ◽

Cited By ~ 10

Author(s):

Tom Clifford ◽

Glyn Howatson ◽

Daniel J. West ◽

Emma J. Stevenson

Keyword(s):

Muscle Damage ◽

Sodium Nitrate ◽

Muscle Pain ◽

Pressure Pain Threshold ◽

High Sensitivity ◽

Group Differences ◽

Beetroot Juice ◽

Analgesic Effects ◽

Drop Jumps ◽

Exercise Induced

The aim of this study was to compare the effects of beetroot juice (BTJ) and a nitrate only drink (sodium nitrate; SN) on indices of exercise-induced muscle damage (EIMD). Thirty recreationally active males consumed either BTJ (n = 10), a nitrate-matched SN drink (n = 10), or an isocaloric placebo (PLA; n = 10) immediately and at 24 and 48 h after performing 100 drop jumps. To assess muscle damage, maximal isometric voluntary contractions (MIVCs), countermovement jumps (CMJs), pressure-pain threshold (PPT), creatine kinase (CK), and high-sensitivity C-reactive protein (hs-CRP) were measured before, immediately after and at 24, 48, and 72 h following the drop jumps. BTJ and SN increased serum nitric oxide, which peaked at 2 h post-ingestion (136 ± 78 and 189 ± 79 μmol·L−1, respectively). PPT decreased in all groups postexercise (P = 0.001), but was attenuated with BTJ compared with SN and PLA (P = 0.043). PPT was 104% ± 26% of baseline values at 72 h after BTJ, 94% ± 16% after SN, and 91% ± 19% after PLA. MIVC and CMJ were reduced following exercise (−15% to 25%) and did not recover to baseline by 72 h in all groups; however, no group differences were observed (P > 0.05). Serum CK increased after exercise but no group differences were present (P > 0.05). hsCRP levels were unaltered by the exercise protocol (P > 0.05). These data suggest that BTJ supplementation is more effective than SN for attenuating muscle pain associated with EIMD, and that any analgesic effects are likely due to phytonutrients in BTJ other than nitrate, or interactions between them.

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Protection Against Muscle Damage Following Fifty Drop Jumps Conferred by Ten Drop Jumps

The Journal of Strength and Conditioning Research ◽

10.1519/r-21056.1 ◽

2007 ◽

Vol 21 (4) ◽

pp. 1087 ◽

Cited By ~ 6

Author(s):

Motoyoshi Miyama ◽

Kazunori Nosaka

Keyword(s):

Muscle Damage ◽

Drop Jumps

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THE EFFECT OF DIFFERENT DOSE OF DROP JUMPING ON SYMPTOMS OF MUSCLE DAMAGE

Baltic Journal of Sport and Health Sciences ◽

10.33607/bjshs.v1i108.6 ◽

2018 ◽

Vol 1 (108) ◽

pp. 25-29

Author(s):

Albertas Skurvydas ◽

Gediminas Mamkus ◽

Dalia Mickevičienė ◽

Diana Karanauskienė ◽

Dovilė Valančienė ◽

...

Keyword(s):

Creatine Kinase ◽

Muscle Damage ◽

Muscle Soreness ◽

Knee Extension ◽

Cycle Exercise ◽

Healthy Men ◽

Maximal Intensity ◽

Drop Jumps ◽

Stretch Shortening Cycle ◽

Exercise Induced

Background. The aim of this study was to follow symptoms of exercise induced muscle damage in response to 50, 100 and 200 drop jumps with maximal intensity. Methods. Three groups of young healthy men (n = 10 in each group) performed a bout of mechanically demanding stretch shortening cycle exercise consisting of 50, 100 and 200 drop jumps. Voluntary and electrically induced knee extension torque, creatine kinase, muscle soreness were measured before and 24 h after exercise. Results. Indirect symptoms of exercise induced damage were dependent on DJs volume: the higher the numbers of jumps, the more symptoms were observed. Only after 200 DJs compared to 50-100 DJ there was decrease of CAR and H of DJ, and 24 h after 200 DJs CK was greater than after 50-100 DJs. Conclusion. In response to acute severe muscle-damaging exercise (after 200 DJs), indirect symptoms of exercise-induced muscle damage occurred.

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Predictive value of strength loss as an indicator of muscle damage across multiple drop jumps

Applied Physiology Nutrition and Metabolism ◽

10.1139/h11-023 ◽

2011 ◽

Vol 36 (3) ◽

pp. 353-360 ◽

Cited By ~ 20

Author(s):

Albertas Skurvydas ◽

Marius Brazaitis ◽

Tomas Venckūnas ◽

Sigitas Kamandulis

Keyword(s):

Muscle Damage ◽

Predictive Value ◽

Time Course ◽

Muscle Soreness ◽

Low Frequency ◽

Knee Extensor ◽

Strength Loss ◽

Drop Jumps ◽

Isokinetic Torque ◽

Exercise Induced

The aim of the present study was to compare the time-course of indirect symptoms of exercise-induced muscle damage after 50 and 100 drop jumps. A high-force, low intensity exercise protocol was used to avoid discrepancies regarding metabolic fatigue immediately after exercise. Healthy untrained men performed 50 (“50 group”, n = 13) or 100 (“100 group”, n = 13) intermittent (30-s interval between each jump) drop jumps, respectively, from the height of 0.5 m with a counter-movement to a 90° knee flexion angle and immediate maximal rebound. Voluntary and electrically evoked knee extensor strength was assessed using an isokinetic dynamometer immediately before and at 2 min after exercise, as well as 3, 7, and 14 days after exercise. Creatine kinase (CK) activity and muscle soreness within 7 days after exercise were also determined. The results showed that the decrease in voluntary isometric and isokinetic torque as well as 100 Hz stimulation torque at the end of the 50 and 100 drop jumps was very similar, while substantial differences were found in low-frequency fatigue, shift in optimal knee joint angle, muscle soreness, and CK activity. In addition, there was slower muscle strength recovery after the 100 drop jumps. It is concluded that the predictive value of strength loss immediately after exercise as an indicator of muscle damage decreases as the jump number increases. Still, stimuli must be large enough for muscle torque to reach the reduction plateau. Therefore, magnitude of exercise becomes a major factor in accuracy of muscle damage predictions.

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PROTECTION AGAINST MUSCLE DAMAGE FOLLOWING FIFTY DROP JUMPS CONFERRED BY TEN DROP JUMPS

The Journal of Strength and Conditioning Research ◽

10.1519/00124278-200711000-00019 ◽

2007 ◽

Vol 21 (4) ◽

pp. 1087-1092 ◽

Cited By ~ 1

Author(s):

MOTOYOSHI MIYAMA ◽

KAZUNORI NOSAKA

Keyword(s):

Muscle Damage ◽

Drop Jumps

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Supplementation with a Mango Leaf Extract (Zynamite®) in Combination with Quercetin Attenuates Muscle Damage and Pain and Accelerates Recovery after Strenuous Damaging Exercise

Nutrients ◽

10.3390/nu12030614 ◽

2020 ◽

Vol 12 (3) ◽

pp. 614 ◽

Cited By ~ 3

Author(s):

Marcos Martin-Rincon ◽

Miriam Gelabert-Rebato ◽

Victor Galvan-Alvarez ◽

Angel Gallego-Selles ◽

Miriam Martinez-Canton ◽

...

Keyword(s):

Muscle Damage ◽

Muscle Pain ◽

Leaf Extract ◽

Muscle Performance ◽

Double Blind ◽

Treatment Groups ◽

Natural Polyphenol ◽

Drop Jumps ◽

Exercise Induced ◽

Mechanical Impulse

Prolonged or unusual exercise may cause exercise-induced muscle damage (EIMD). To test whether Zynamite®, a mango leaf extract rich in the natural polyphenol mangiferin, administered in combination with quercetin facilitates recovery after EIMD, 24 women and 33 men were randomly assigned to two treatment groups matched by sex and 5 km running performance, and ran a 10 km race followed by 100 drop jumps to elicit EIMD. One hour before the competition, and every 8 h thereafter for 24 h, they ingested placebo (728 mg of maltodextrin) or 140 mg of Zynamite® combined with 140 mg of quercetin (double-blind). Although competition times were similar, polyphenol supplementation attenuated the muscle pain felt after the competition (6.8 ± 1.5 and 5.7 ± 2.2 a.u., p = 0.035) and the loss of jumping performance (9.4 ± 11.5 and 3.9 ± 5.2%, p = 0.036; p = 0.034) and mechanical impulse (p = 0.038) 24 h later. The polyphenols attenuated the increase of serum myoglobin and alanine aminotransferase in men, but not in women (interaction p < 0.05). In conclusion, a single dose of 140 mg Zynamite® combined with 140 mg of quercetin, administered one hour before competition, followed by three additional doses every eight hours, attenuates muscle pain and damage, and accelerates the recovery of muscle performance.

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Human alpha-actinin-3 genotype association with exercise-induced muscle damage and the repeated-bout effect

Applied Physiology Nutrition and Metabolism ◽

10.1139/h2012-087 ◽

2012 ◽

Vol 37 (6) ◽

pp. 1038-1046 ◽

Cited By ~ 21

Author(s):

Tomas Venckunas ◽

Albertas Skurvydas ◽

Marius Brazaitis ◽

Sigitas Kamandulis ◽

Audrius Snieckus ◽

...

Keyword(s):

Muscle Damage ◽

Eccentric Exercise ◽

Knee Extension ◽

Repeated Bout Effect ◽

Drop Jumps ◽

Jumping Exercise ◽

Exercise Induced ◽

Torque Values ◽

The Impact ◽

Repeated Bout

Alpha-actinin-3 (ACTN3) is an integral part of the Z line of the sarcomere. The ACTN3 R577X (rs1815739) polymorphism determines the presence or absence of functional ACTN3, which may influence the extent of exercise-induced muscle damage. This study aimed to compare the impact of, and recovery from, muscle-damaging eccentric exercise on subjects with or without functional ACTN3. Seventeen young men (20–33 years old), homozygous for the R (n = 9) or X (n = 8) alleles, performed two bouts of stretch–shortening exercise (50 drop jumps) two weeks apart. Muscle soreness, plasma creatine kinase (CK) activity, jump height, maximal voluntary isometric torque (MVC), peak concentric isokinetic torque (IT), and electrically stimulated knee extension torques at 20 and 100 Hz were measured at baseline and at a number of time points up to 14 days after each bout. There were no significant baseline differences between the groups. However, significant time point × genotype interactions were observed for MVC (p = 0.021) and IT (p = 0.011) for the immediate effect of eccentric exercise in bout 1. The RR group showed greater voluntary force decrements (RR vs. XX: MVC, –33.3% vs. –24.5%; IT, –35.9% vs. –23.2%) and slower recovery. A repeated-bout effect was clearly observed, but there were no differences by genotype group. The ACTN3 genotype modulates the response of muscle function to plyometric jumping exercise, although the differences are modest. The ACTN3 genotype does not influence the clearly observed repeated-bout effect; however, XX homozygotes recover baseline voluntary torque values faster and thus may be able to undertake more frequent training sesssions.

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