scholarly journals Isometric pre-conditioning blunts exercise-induced muscle damage but does not attenuate changes in running economy following downhill running

2018 ◽  
Vol 60 ◽  
pp. 1-9 ◽  
Author(s):  
Leonardo C.R. Lima ◽  
Natália M. Bassan ◽  
Adalgiso C. Cardozo ◽  
Mauro Gonçalves ◽  
Camila C. Greco ◽  
...  
Keyword(s):  
Muscle Damage ◽  
Running Economy ◽  
Downhill Running ◽  
Exercise Induced

scholarly journals Exercise-Induced Muscle Damage and Running Economy in Humans

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Cláudio de Oliveira Assumpção ◽  
Leonardo Coelho Rabello Lima ◽  
Felipe Bruno Dias Oliveira ◽  
Camila Coelho Greco ◽  
Benedito Sérgio Denadai
Keyword(s):  
Muscle Damage ◽  
High Intensity ◽  
Energy Demand ◽  
Negative Impact ◽  
High Intensity Exercise ◽  
Running Economy ◽  
Running Performance ◽  
Downhill Running ◽  
Short Period ◽  
Exercise Induced

Running economy (RE), defined as the energy demand for a given velocity of submaximal running, has been identified as a critical factor of overall distance running performance. Plyometric and resistance trainings, performed during a relatively short period of time (~15–30 days), have been successfully used to improve RE in trained athletes. However, these exercise types, particularly when they are unaccustomed activities for the individuals, may cause delayed onset muscle soreness, swelling, and reduced muscle strength. Some studies have demonstrated that exercise-induced muscle damage has a negative impact on endurance running performance. Specifically, the muscular damage induced by an acute bout of downhill running has been shown to reduce RE during subsequent moderate and high-intensity exercise (>65% VO2max). However, strength exercise (i.e., jumps, isoinertial and isokinetic eccentric exercises) seems to impair RE only for subsequent high-intensity exercise (~90% VO2max). Finally, a single session of resistance exercise or downhill running (i.e., repeated bout effect) attenuates changes in indirect markers of muscle damage and blunts changes in RE.

scholarly journals Consumption of An Anthocyanin-Rich Antioxidant Juice Accelerates Recovery of Running Economy and Indirect Markers of Exercise-Induced Muscle Damage Following Downhill Running

Nutrients ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2274 ◽  
Author(s):  
Leonardo C. R. Lima ◽  
Renan V. Barreto ◽  
Natália M. Bassan ◽  
Camila C. Greco ◽  
Benedito S. Denadai
Keyword(s):  
Oxygen Uptake ◽  
Muscle Damage ◽  
Muscle Soreness ◽  
Kinase Activity ◽  
Peak Torque ◽  
Creatine Kinase Activity ◽  
Running Economy ◽  
Perceived Effort ◽  
Downhill Running ◽  
Exercise Induced

This study examined the effects of anthocyanin-rich antioxidant juice (AJ) on the recovery of exercise-induced muscle damage (EIMD) and the running economy (RE) following downhill running (DHR). Thirty healthy young men were randomly divided into two blinded groups and consumed either AJ or placebo (PLA) for nine days (240 mL twice-a-day). On day 5, the participants from both groups ran downhill (−15%) for 30 min at 70% of their maximal oxygen uptake (VO2max) speeds. The changes in RE (oxygen uptake (VO2) and perceived effort (PE) during 5-min runs at 80%VO2max) and EIMD (isometric peak torque (IPT), muscle soreness (SOR) and serum creatine kinase activity (CK)) were compared over time and between the groups on the 4 days following DHR. VO2 and PE increased (p < 0.05) immediately following DHR for both groups and remained elevated for PLA until 48h post-DHR while fully recovering 24 h post-DHR for AJ. SOR was greater (p < 0.05) for PLA throughout the study. CK increased for both groups and was greater (p < 0.05) for PLA at 96 h post-DHR. IPT decreased for both groups but recovered faster for AJ (72 h) compared to PLA (no full recovery). AJ accelerated recovery of RE and EIMD and should be used in specific contexts, but not chronically.

scholarly journals The Impact of ACTN3 Gene Polymorphisms on Susceptibility to Exercise-Induced Muscle Damage and Changes in Running Economy Following Downhill Running

2021 ◽  
Vol 12 ◽  
Author(s):  
Leonardo Coelho Rabello de Lima ◽  
Carlos Roberto Bueno Junior ◽  
Claudio de Oliveira Assumpção ◽  
Natália de Menezes Bassan ◽  
Renan Vieira Barreto ◽  
...  
Keyword(s):  
Oxygen Uptake ◽  
Muscle Damage ◽  
Perceived Exertion ◽  
Lactate Concentration ◽  
Blood Lactate Concentration ◽  
Neuromuscular Function ◽  
Running Economy ◽  
Downhill Running ◽  
Exercise Induced ◽  
The Impact

This study aimed to investigate if ACTN3 gene polymorphism impacts the susceptibility to exercise-induced muscle damage (EIMD) and changes in running economy (RE) following downhill running. Thirty-five healthy men were allocated to the two groups based on their ACTN3 gene variants: RR and X allele carriers. Neuromuscular function [knee extensor isometric peak torque (IPT), rate of torque development (RTD), and countermovement, and squat jump height], indirect markers of EIMD [muscle soreness, mid-thigh circumference, knee joint range of motion, and serum creatine kinase (CK) activity], and RE (oxygen uptake, minute ventilation, blood lactate concentration, and perceived exertion) for 5-min of running at a speed equivalent to 80% of individual maximal oxygen uptake speed were assessed before, immediately after, and 1–4 days after a 30-min downhill run (−15%). Neuromuscular function was compromised (P &lt; 0.05) following downhill running with no differences between the groups, except for IPT, which was more affected in the RR individuals compared with the X allele carriers immediately (−24.9 ± 6.9% vs. −16.3 ± 6.5%, respectively) and 4 days (−16.6 ± 14.9% vs. −4.2 ± 9.5%, respectively) post-downhill running. EIMD manifested similarly for both the groups except for serum CK activity, which was greater for RR (398 ± 120 and 452 ± 126 U L–1 at 2 and 4 days following downhill running, respectively) compared with the X allele carriers (273 ± 121 and 352 ± 114 U L–1 at the same time points). RE was compromised following downhill running (16.7 ± 8.3% and 11 ± 7.5% increases in oxygen uptake immediately following downhill running for the RR and X allele carriers, respectively) with no difference between the groups. We conclude that although RR individuals appear to be more susceptible to EIMD following downhill running, this does not extend to the changes in RE.

Curcumin effects on inflammation and performance recovery following eccentric exercise-induced muscle damage

2007 ◽  
Vol 292 (6) ◽  
pp. R2168-R2173 ◽  
Author(s):  
J. Mark Davis ◽  
E. Angela Murphy ◽  
Martin D. Carmichael ◽  
Mark R. Zielinski ◽  
Claire M. Groschwitz ◽  
...  
Keyword(s):  
Creatine Kinase ◽  
Muscle Damage ◽  
Inflammatory Cytokines ◽  
Eccentric Exercise ◽  
Activity Wheel ◽  
Voluntary Activity ◽  
Running Performance ◽  
Functional Deficits ◽  
Downhill Running ◽  
Exercise Induced

Downhill running is associated with fiber damage, inflammation, delayed-onset muscle soreness, and various functional deficits. Curcumin, a constituent of the Indian spice turmeric has been investigated for its anti-inflammatory activity and may offset some of the damage and functional deficits associated with downhill running. This study examined the effects of curcumin on inflammation and recovery of running performance following downhill running in mice. Male mice were assigned to downhill placebo (Down-Plac), downhill curcumin (Down-Cur), uphill placebo (Up-Plac), or uphill curcumin (Up-Cur) groups and run on a treadmill at 22 m/min at −14% or +14% grade, for 150 min. At 48 h or 72 h after the up/downhill run, mice ( experiment 1) underwent a treadmill performance run to fatigue. Another subset of mice was placed in voluntary activity wheel cages following the up/downhill run ( experiment 2) and their voluntary activity (distance, time and peak speed) was recorded. Additional mice ( experiment 3) were killed at 24 h and 48 h following the up/downhill run, and the soleus muscle was harvested for analysis of inflammatory cytokines (IL-1β, IL-6, and TNF-α), and plasma was collected for creatine kinase analysis. Downhill running decreased both treadmill run time to fatigue (48 h and 72 h) and voluntary activity (24 h) ( P < 0.05), and curcumin feedings offset these effects on running performance. Downhill running was also associated with an increase in inflammatory cytokines (24 h and 48 h) and creatine kinase (24 h) ( P < 0.05) that were blunted by curcumin feedings. These results support the hypothesis that curcumin can reduce inflammation and offset some of the performance deficits associated with eccentric exercise-induced muscle damage.

Skeletal troponin I as a marker of exercise-induced muscle damage

1997 ◽  
Vol 83 (4) ◽  
pp. 1076-1082 ◽  
Author(s):  
Stephan Sorichter ◽  
Johannes Mair ◽  
Arnold Koller ◽  
Walter Gebert ◽  
Daniel Rama ◽  
...  
Keyword(s):  
Muscle Damage ◽  
Troponin I ◽  
Eccentric Contractions ◽  
Specific Marker ◽  
Physical Education Teacher ◽  
Downhill Running ◽  
Teacher Trainees ◽  
Exercise Induced ◽  
Plasma Marker ◽  
Level Running

Sorichter, Stephan, Johannes Mair, Arnold Koller, Walter Gebert, Daniel Rama, Charles Calzolari, Erika Artner-Dworzak, and Bernd Puschendorf. Skeletal troponin I as a marker of exercise-induced muscle damage. J. Appl. Physiol.83(4): 1076–1082, 1997.—The utility of skeletal troponin I (sTnI) as a plasma marker of skeletal muscle damage after exercise was compared against creatine kinase (CK), myoglobin (Mb), and myosin heavy chain (MHC) fragments. These markers were serially measured in normal physical education teacher trainees after four different exercise regimens: 20 min of level or downhill (16% decline) running (intensity: 70% maximal O2uptake), high-force eccentric contractions (70 repetitions), or high-force isokinetic concentric contractions of the quadriceps group (40 repetitions). Eccentrically biased exercise (downhill running and eccentric contractions) promoted greater increases in all parameters. The highest plasma concentration were found after downhill running {median peaks: 309 U/l CK concentration ([CK])}, 466 μg/l Mb concentration ([Mb]), 1,021 μU/l MHC concentration ([MHC]), and 27.3 μg/l sTnI concentration ([sTnI]). Level running produced a moderate response (median peaks: 178 U/l [CK], 98 μg/l [Mb], 501 μU/l [MHC], and 6.6 μg/l [sTnI]), whereas the concentric contraction protocol did not elicit significant changes in any of the markers assayed. sTnI increased and peaked in parallel to CK and stayed elevated (>2.2 μg/l) for at least 1–2 days after exercise. In contrast to MHC, sTnI is an initial, specific marker of exercise-induced muscle injury, which may be partly explained by their different intracellular compartmentation with essentially no (MHC <0.1%) or a small soluble pool (sTnI: median 3.4%).

Role of brain IL-1β on fatigue after exercise-induced muscle damage

2006 ◽  
Vol 291 (5) ◽  
pp. R1344-R1348 ◽  
Author(s):  
Martin D. Carmichael ◽  
J. Mark Davis ◽  
E. Angela Murphy ◽  
Adrienne S. Brown ◽  
James A. Carson ◽  
...  
Keyword(s):  
Muscle Damage ◽  
Wheel Running ◽  
Systematic Evaluation ◽  
Running Performance ◽  
Downhill Running ◽  
Running Activity ◽  
Wheel Running Activity ◽  
Sickness Behaviors ◽  
Exercise Induced

Brain cytokines, induced by various inflammatory challenges, have been linked to sickness behaviors, including fatigue. However, the relationship between brain cytokines and fatigue after exercise is not well understood. Delayed recovery of running performance after muscle-damaging downhill running is associated with increased brain IL-1β concentration compared with uphill running. However, there has been no systematic evaluation of the direct effect of brain IL-1β on running performance after exercise-induced muscle damage. This study examined the specific role of brain IL-1β on running performance (either treadmill or wheel running) after uphill and downhill running by manipulating brain IL-1β activity via intracerebroventricular injection of either IL-1 receptor antagonist (ra; downhill runners) or IL-1β (uphill runners). Male C57BL/6 mice were assigned to the following groups: uphill-saline, uphill-IL-1β, downhill-saline, or downhill-IL-1ra. Mice initially ran on a motor-driven treadmill at 22 m/min and −14% or +14% grade for 150 min. After the run, at 8 h (wheel cage) or 22 h (treadmill), uphill mice received intracerebroventricular injections of IL-1β (900 pg in 2 μl saline) or saline (2 μl), whereas downhill runners received IL-1ra (1.8 μg in 2 μl saline) or saline (2 μl). Later (2 h), running performance was measured (wheel running activity and treadmill run to fatigue). Injection of IL-1β significantly decreased wheel running activity in uphill runners ( P < 0.01), whereas IL-1ra improved wheel running in downhill runners ( P < 0.05). Similarly, IL-1β decreased and Il-1ra increased run time to fatigue in the uphill and downhill runners, respectively ( P < 0.01). These results support the hypothesis that increased brain IL-1β plays an important role in fatigue after muscle-damaging exercise.

scholarly journals Involvement of Neutrophil Dynamics and Function in Exercise-Induced Muscle Damage and Delayed-Onset Muscle Soreness: Effect of Hydrogen Bath

Antioxidants ◽  
2018 ◽  
Vol 7 (10) ◽  
pp. 127 ◽  
Author(s):  
Takuji Kawamura ◽  
Katsuhiko Suzuki ◽  
Masaki Takahashi ◽  
Miki Tomari ◽  
Reira Hara ◽  
...  
Keyword(s):  
Muscle Damage ◽  
Neutrophil Count ◽  
Muscle Soreness ◽  
Delayed Onset Muscle Soreness ◽  
Delayed Onset ◽  
Downhill Running ◽  
Dynamics And Function ◽  
Exercise Induced ◽  
And Function ◽  
Peripheral Neutrophil

The purpose of this study was to investigate the involvement of neutrophil dynamics and function in exercise-induced muscle damage (EIMD) and delayed-onset muscle soreness (DOMS), and the effect of molecular hydrogen (H2) intake on these parameters. Nine healthy and active young men performed H2 and placebo bath trial in a crossover design. They carried out downhill running (−8% slope) for 30 min at a speed corresponding to 75~85% of peak oxygen uptake (VO2peak). Subsequently, they repeated bathing for 20 min per day for one week. Degree of muscle soreness (visual analogue scale: VAS), peripheral leukocyte counts, neutrophil dynamics and function, muscle damage, and inflammation markers were measured. Plasma interleukin (IL)-6 concentration was significantly correlated with peripheral neutrophil count, VAS, and serum creatine kinase activity, respectively, after downhill running. Peripheral neutrophil count and serum myoglobin concentration were also significantly correlated. Conversely, there were no effects of H2 bath. These results suggest that IL-6 may be involved in the mobilization of neutrophils into the peripheral blood and subsequent EIMD and DOMS after downhill running; however, it is not likely that H2 bath is effective for the inflammatory process that was centered on neutrophils after downhill running.

North American ginseng protects against muscle damage and reduces neutrophil infiltration after an acute bout of downhill running in rats

2015 ◽  
Vol 40 (2) ◽  
pp. 116-121 ◽  
Author(s):  
Mehrbod Estaki ◽  
Earl G. Noble
Keyword(s):  
Muscle Damage ◽  
Eccentric Exercise ◽  
North American ◽  
Neutrophil Infiltration ◽  
American Ginseng ◽  
Functional Deficits ◽  
Downhill Running ◽  
Single Bout ◽  
Male Wistar Rats ◽  
Exercise Induced

Eccentric muscle contractions such as those experienced during downhill running are associated with inflammation, delayed-onset of muscle soreness, myofiber damage, and various functional deficits. North American ginseng (Panax quinquefolius L.) has been reported to possess anti-inflammatory properties and thus may offset some of this exercise-induced damage. Hence, we tested the hypothesis that intervention with North American ginseng would reduce eccentric exercise-induced muscle damage and inflammation. Male Wistar rats were fed (300 mg/(kg·day)–1) of either an alcohol (AL) or aqueous (AQ) extract of North American ginseng for 14 days before a single bout of downhill running and were compared with matching nonexercised (C) groups. Plasma creatine kinase levels were significantly reduced in both ginseng treated groups compared with the C group that received a water placebo (p < 0.002). Further, the AQ but not AL group also showed attenuated morphological signs of damage (hemotoxylin and eosin) as well as reduced levels of infiltrating neutrophils (HIS48) in the soleus muscle (p < 0.001). In summary, supplementation with an AQ but not AL extract of North American ginseng was able to reduce eccentric exercise-induced muscle damage and inflammation.

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