Acute and prolonged effects of the simulated physical demands of a futsal match on lower limb muscle power and strength, sprint performance and muscle soreness

2021 ◽  
pp. 1-9
Author(s):  
Filipe E. Costa ◽  
Rafael L. Kons ◽  
Fabio Y. Nakamura ◽  
Juliano Dal Pupo
Keyword(s):  
Repeated Measures ◽  
Muscle Soreness ◽  
Muscle Power ◽  
Sprint Performance ◽  
Knee Extensors ◽  
Half Time ◽  
Physical Demands ◽  
Performance Tasks ◽  
Hamstring Muscles ◽  
Acute And Prolonged Effects

BACKGROUND: Prolonged fatigue effects may be a concern after futsal matches mainly because of the actions performed by futsal players (e.g., sprinting, jumping) that usually involve the stretch-shortening cycle (SSC). However, there no studies analyzed the prolonged effects of futsal-specific fatigue and how futsal players can recover from performance tasks. OBJECTIVE: To analyze the acute and prolonged effects of a protocol that simulates specific physical demands of futsal on countermovement-jump, sprint performance, muscle strength and muscle soreness. METHODS: Fifteen amateur futsal male athletes (18.3 ± 3.8 years) performed a futsal intermittent running protocol (FIRP) and were assessed for (moment production, sprint and jumping performance and muscle soreness) at pre, during half-time, immediately after, post 24 and 48 hours after the FIRP. Analysis of variance (repeated measures) was used to compare variable means over time. RESULTS: The main results indicated a decrement in the CMJ height (p= 0.03) and an increase of 10 m and 20 m sprint times (p= 0.01–p< 0.01, respectively) during half-time and the post FIRP. There was a decrement in eccentric peak moment of the knee extensors (p= 0.02) and flexors (p< 0.01) until 48h post protocol and a decrement in concentric peak moment of the flexors (p< 0.01) post protocol. Athletes reported muscle soreness in the hamstrings (p= 0.03) post and 24 h after the FIRP. CONCLUSION: FIRP induced acute effects in the jump and sprint performances only. On the other hand, the knee moment production capability (mainly eccentric) suffered acute and also prolonged effects of the FIRP accompanied by delayed muscle soreness in the hamstring muscles.

scholarly journals Kinesio Taping Does Not Alter Quadriceps Isokinetic Strength and Power in Healthy Nonathletic Men: A Prospective Crossover Study

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Paweł Korman ◽  
Anna Straburzyńska-Lupa ◽  
Radosław Rutkowski ◽  
Jakub Gruszczyński ◽  
Jacek Lewandowski ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Peak Torque ◽  
Quadriceps Muscle ◽  
Knee Extensors ◽  
Isokinetic Strength ◽  
Acute Effects ◽  
Isokinetic Dynamometer ◽  
Mean Power ◽  
Concentric Contractions ◽  
Kinesio Taping

Objectives. The effects of Kinesio Taping (KT) on muscular performance remain largely unclear. This study aimed to investigate the acute effects of KT on the maximum concentric and eccentric quadriceps isokinetic strength.Study Design. This is a single-blinded, placebo crossover, repeated measures study.Methods. Maximum isokinetic concentric/eccentric extension torque, work, and power were assessed by an isokinetic dynamometer without taping (NT) and with KT or placebo taping (PT) in 17 healthy young men. Repeated measures one-way analysis of variance (ANOVA) was used for statistical analyses.Results. Testing concentric contractions at 60°/s or 180°/s isokinetic speed, no significant differences in peak torque (Nm), total work (J), or mean power (W) were noted among the application modes under different conditions. Testing eccentric contractions at 30°/s or 60°/s isokinetic speed, no significant differences in mentioned parameters were noted, respectively. KT on the quadriceps neither decreased nor increased muscle strength in the participants.Conclusion. KT application onto the skin overlying the quadriceps muscle does not enhance the strength or power of knee extensors in healthy men.

Cognitive Load Impairs Time to Initiate and Complete Shooting Tasks in ROTC Members

2021 ◽  
Author(s):  
Sean Buckley ◽  
Meredith Chaput ◽  
Janet E Simon ◽  
Cody R Criss ◽  
Philip Brazalovich ◽  
...  
Keyword(s):  
Cognitive Load ◽  
Repeated Measures ◽  
Response Selection ◽  
Motor Task ◽  
Movement Speed ◽  
Task Completion ◽  
Performance Tasks ◽  
Cognitive Information ◽  
Cognitive Decision ◽  
Cognitive Challenges

ABSTRACT Introduction Multitasking typically requires an individual to simultaneously process cognitive information while performing a motor task. Cognitive motor interference (CMi) is encountered when cognitive challenges negatively impact motor task performance. Military personnel encounter cognitively taxing situations, especially during combat or other tactical performance scenarios, which may lead to injury or motor performance deficits (i.e., shooting inaccuracy, delayed stimulus–response time, and slowed movement speed). The purpose of the current study was to develop four cognitive motor shooting paradigms to determine the effects of cognitive load on shooting performance in healthy Reserve Officers’ Training Corps (ROTC) cadets. Methods Thirty-two healthy collegiate ROTC members (24 male and 8 female; 20.47 ± 1.24 years, 174.95 ± 10.58 cm, and 77.99 ± 13.90 kg) were recruited to complete four simulated shooting tasks with additional “motor” challenge (180° turn, gait, weighted, and unweighted landing) and with and without a “cognitive” decision-making challenge requiring response selection and inhibition to both auditory and visual stimuli, totaling eight multi-task cognitive motor shooting conditions. The current study was approved by the university’s Institutional Review Board. Task initiation (seconds), task completion (seconds), and number of misses were calculated to determine marksmanship efficiency and accuracy. For each task, a multivariate repeated-measures analysis of variance (ANOVA) was conducted for the combined dependent variables. If the overall multivariate repeated-measures ANOVA was significant, follow-up univariate ANOVAs were conducted for each dependent variable. Alpha was set at α = 0.05 for all analyses. Results Task initiation increased for the cognitive condition for the 180° turn (4.29 ± 1.22 seconds baseline, 5.09 ± 1.39 seconds cognitive; P &lt; .05), gait (2.76 ± .60 seconds baseline, 3.93 ± .62 seconds cognitive; P &lt; .05), unweighted (1.27 ± .57 seconds baseline, 3.39 ± .63 seconds cognitive; P &lt; .05), and weighted landing (1.46 ± .72 seconds baseline, 3.35 ± .60 seconds cognitive; P &lt; .05). Task completion time increased for the cognitive condition for the 180° turn (3.48 ± 1.53 seconds baseline, 4.85 ± 1.24 seconds cognitive; P &lt; .05), gait (7.84 ± 2.07 seconds baseline, 9.23 ± 1.76 seconds cognitive; P &lt; .05), unweighted (5.98 ± 1.55 seconds baseline, 7.45 ± 1.51 seconds cognitive; P &lt; .05), and weighted landing (6.09 ± 1.42 seconds baseline, 7.25 ± 1.79 seconds cognitive; P &lt; .05). There were no statistically significant differences in the number of misses for any of the tasks between conditions (P &gt; .05). Conclusions The addition of a cognitive load increased both task initiation and task completion times during cognitive motor simulated shooting. Adding cognitive loads to tactical performance tasks can result in CMi and negatively impact tactical performance. Thus, consideration for additional cognitive challenges into training may be warranted to reduce the potential CMi effect on tactical performance.

Air travel across four time zones in college swimmers

1991 ◽  
Vol 70 (2) ◽  
pp. 756-763 ◽  
Author(s):  
P. J. O'Connor ◽  
W. P. Morgan ◽  
K. F. Koltyn ◽  
J. S. Raglin ◽  
J. G. Turner ◽  
...  
Keyword(s):  
Salivary Cortisol ◽  
Repeated Measures ◽  
Muscle Soreness ◽  
Perceived Exertion ◽  
Air Travel ◽  
Maximal Velocity ◽  
Time Zones ◽  
Male College ◽  
Effort Sense ◽  
Affective Consequences

Eighteen female and 22 male college swimmers were flown across four time zones in east-to-west (E-W) and west-to-east (W-E) directions. A pre- and postflight paced swim of 182.9 m at an intensity equal to 90% of the swimmers' maximal velocity was completed, and salivary cortisol, heart rate (HR), and rated perceived exertion were measured. Blood pressure, HR, muscle soreness, and mood were also assessed at rest on the day before and on the day after travel. Because training volumes for both females and males were greater (P less than 0.001) in the week before W-E than E-W travel, the W-E and E-W data were analyzed separately. Two-way repeated-measures analyses of variance revealed that pre- and postexercise cortisol decreased after E-W travel and increased after W-E travel in comparison to preflight values. Resting and exercise HR responses to air travel were small in magnitude, and their significance depended on the direction of travel. Effort sense was not altered by air travel, but significant (P less than 0.001) improvements in mood and reductions in muscle soreness were observed after E-W and W-E travel for both genders. It was concluded that 1) female and male college swimmers have similar responses to air travel and 2) air travel across four time zones during heavy swim training does not have negative physiological, perceptual, or affective consequences.

scholarly journals Muscle Damage Indicated by Maximal Voluntary Contraction Strength Changes From Immediately to 1 Day After Eccentric Exercise of the Knee Extensors

2021 ◽  
Vol 12 ◽  
Author(s):  
Mikio Shoji ◽  
Ryoichi Ema ◽  
Kazunori Nosaka ◽  
Akihiro Kanda ◽  
Kosuke Hirata ◽  
...  
Keyword(s):  
Shear Modulus ◽  
Muscle Damage ◽  
Eccentric Exercise ◽  
Recovery Rate ◽  
Muscle Soreness ◽  
Knee Extensors ◽  
Significant Group ◽  
Post Exercise ◽  
Significant Difference ◽  
Recovery Group

The present study examined if the magnitude of changes in indirect muscle damage markers could be predicted by maximal voluntary isometric contraction (MVIC) torque changes from immediately to 1 day after eccentric exercise. Twenty-eight young men performed 100 maximal isokinetic (60°/s) eccentric contractions of the knee extensors. MVIC torque, potentiated doublet torque, voluntary activation (VA) during MVIC, shear modulus of rectus femoris (RF), vastus medialis and lateralis, and muscle soreness of these muscles were measured before, immediately after, and 1–3 days post-exercise. Based on the recovery rate of the MVIC torque from immediately to 1-day post-exercise, the participants were placed to a recovery group that showed an increase in the MVIC torque (11.3–79.9%, n = 15) or a no-recovery group that showed no recovery (−71.9 to 0%, n = 13). No significant difference in MVIC torque decrease immediately post-exercise was found between the recovery (−33 ± 12%) and no-recovery (−32 ± 9%) groups. At 1–3 days, changes in MVIC torque (−40 to −26% vs. −22 to −12%), potentiated doublet torque (−37 to −22% vs. −20 to −9%), and proximal RF shear modulus (29–34% vs. 8–15%) were greater (p &lt; 0.05) for the no-recovery than recovery group. No significant group differences were found for muscle soreness. The recovery rate of MVIC torque was correlated (p &lt; 0.05) with the change in MVIC torque from baseline to 2 (r = 0.624) or 3 days post-exercise (r = 0.526), or peak change in potentiated doublet torque at 1–3 days post-exercise from baseline (r = 0.691), but not correlated with the changes in other dependent variables. These results suggest that the recovery rate of MVIC torque predicts changes in neuromuscular function but not muscle soreness and stiffness following eccentric exercise of the knee extensors.

Effect of cluster set warm-up configurations on sprint performance in collegiate male soccer players

2018 ◽  
Vol 43 (6) ◽  
pp. 625-630 ◽  
Author(s):  
Brett S. Nickerson ◽  
Gerald T. Mangine ◽  
Tyler D. Williams ◽  
Ismael A. Martinez
Keyword(s):  
Repeated Measures ◽  
Sprint Performance ◽  
Soccer Players ◽  
Strength And Conditioning ◽  
Warm Up ◽  
Back Squat ◽  
Cluster Set ◽  
Rest Periods ◽  
Single Cluster ◽  
Traditional Manner

The purpose of this study was to determine if back squat cluster sets (CS) with varying inter-repetition rest periods would potentiate greater sprint performance compared with a traditional set parallel back squat in collegiate soccer players. Twelve collegiate male soccer players (age, 21.0 ± 2.0 years; height, 180.0 ± 9.0 cm; body mass, 79.0 ± 9.5 kg) performed a 20-m sprint prior to a potentiation complex and at 1, 4, 7, and 10 min postexercise on 3 separate, randomized occasions. On each occasion, the potentiation complex consisted of 1 set of 3 repetitions at 85% 1-repetition maximum (1RM) for the traditional parallel back squat. However, on 1 occasion the 3-repetition set was performed in a traditional manner (i.e., continuously), whereas on the other 2 occasions, 30s (CS30) and 60 s (CS60) of rest were allotted between each repetition. Repeated-measures ANOVA revealed greater (p = 0.022) mean barbell velocity on CS60 compared with the traditional set. However, faster (p < 0.040) 20-m sprint times were observed for CS30 (3.15 ± 0.16 s) compared with traditional (3.20 ± 0.17 s) only at 10 min postexercise. No other differences were observed. These data suggest that a single cluster set of 3 repetitions with 30-s inter-repetition rest periods at 85% 1RM acutely improves 20-m sprinting performance. Strength and conditioning professionals and their athletes might consider its inclusion during the specific warm-up to acutely improve athletic performance during the onset (≤10 min) of training or competition.

scholarly journals The Effects of Exercise Induced Muscle Damage on Knee Joint Torque and Balance Performance

Sports ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 101
Author(s):  
Nicole Dabbs ◽  
Harish Chander
Keyword(s):  
Knee Joint ◽  
Muscle Damage ◽  
Repeated Measures ◽  
Time Effect ◽  
Joint Torque ◽  
Knee Extensors ◽  
Balance Performance ◽  
Significant Time ◽  
Significant Time Effect ◽  
Exercise Induced

The purpose of this investigation is to determine the effects of exercise induced muscle damage (EIMD) on balance and knee joint torque. Thirteen males and females volunteered to participate in the study. Following a familiarization session, baseline measures were obtained for isometric torque measured during a maximal voluntary isometric contraction (MVIC) for knee flexors and extensors, and ankle dorsi-flexors and plantar-flexors. Additionally, balance performance was tested in double leg (DL), and right single leg (RSL) static and dynamic unstable stability was measured. Participants then performed the muscle damage protocol of front loaded Bulgarian split squats. All measurements were re-assessed for torque and balance immediately and up to 72 h afterwards. A one-way repeated-measures analysis of variance (ANOVA) was used to analyze differences between baseline and all time-points for torque and balance measures. There was a significant time effect for knee extensors MVIC torque, where baseline measures are greater than post EIMD, 24 h and 48 h post EIMD. There was no significant time effect for all balance conditions. These results provide evidence of EIMD following high intensity eccentric exercises with significant reductions in knee extensor torque up to at least 48 h and show that balance was not compromised following EIMD.

scholarly journals Use of Cold-Water Immersion to Reduce Muscle Damage and Delayed-Onset Muscle Soreness and Preserve Muscle Power in Jiu-Jitsu Athletes

2016 ◽  
Vol 51 (7) ◽  
pp. 540-549 ◽  
Author(s):  
Líllian Beatriz Fonseca ◽  
Ciro J. Brito ◽  
Roberto Jerônimo S. Silva ◽  
Marzo Edir Silva-Grigoletto ◽  
Walderi Monteiro da Silva ◽  
...  
Keyword(s):  
Muscle Damage ◽  
Muscle Soreness ◽  
Muscle Power ◽  
Cold Water ◽  
Water Immersion ◽  
Serum Levels ◽  
Cold Water Immersion ◽  
Lower Limbs ◽  
Recovery Method ◽  
Power Recovery

Context: Cold-water immersion (CWI) has been applied widely as a recovery method, but little evidence is available to support its effectiveness. Objective: To investigate the effects of CWI on muscle damage, perceived muscle soreness, and muscle power recovery of the upper and lower limbs after jiu-jitsu training. Design: Crossover study. Setting: Laboratory and field. Patients or Other Participants: A total of 8 highly trained male athletes (age = 24.0 ± 3.6 years, mass = 78.4 ± 2.4 kg, percentage of body fat = 13.1% ± 3.6%) completed all study phases. Intervention(s): We randomly selected half of the sample for recovery using CWI (6.0°C ± 0.5°C) for 19 minutes; the other participants were allocated to the control condition (passive recovery). Treatments were reversed in the second session (after 1 week). Main Outcome Measure(s): We measured serum levels of creatine phosphokinase, lactate dehydrogenase (LDH), aspartate aminotransferase, and alanine aminotransferase enzymes; perceived muscle soreness; and recovery through visual analogue scales and muscle power of the upper and lower limbs at pretraining, postrecovery, 24 hours, and 48 hours. Results: Athletes who underwent CWI showed better posttraining recovery measures because circulating LDH levels were lower at 24 hours postrecovery in the CWI condition (441.9 ± 81.4 IU/L) than in the control condition (493.6 ± 97.4 IU/L; P = .03). Estimated muscle power was higher in the CWI than in the control condition for both upper limbs (757.9 ± 125.1 W versus 695.9 ± 56.1 W) and lower limbs (53.7 ± 3.7 cm versus 35.5 ± 8.2 cm; both P values = .001). In addition, we observed less perceived muscle soreness (1.5 ± 1.1 arbitrary units [au] versus 3.1 ± 1.0 au; P = .004) and higher perceived recovery (8.8 ± 1.9 au versus 6.9 ± 1.7 au; P = .005) in the CWI than in the control condition at 24 hours postrecovery. Conclusions: Use of CWI can be beneficial to jiu-jitsu athletes because it reduces circulating LDH levels, results in less perceived muscle soreness, and helps muscle power recovery at 24 hours postrecovery.

Influence of Pedaling Rate on Muscle Mechanical Energy in Low Power Recumbent Pedaling Using Forward Dynamic Simulations

2007 ◽  
Author(s):  
Nils A. Hakansson ◽  
Maury L. Hull
Keyword(s):  
Low Power ◽  
Dynamic Model ◽  
Inverse Dynamics ◽  
Muscle Power ◽  
Mechanical Energy ◽  
Triceps Surae ◽  
Knee Extensors ◽  
Individual Muscle ◽  
The Individual ◽  
Pedaling Rate

An understanding of the muscle power contributions to the crank and limb segments in recumbent pedaling would be useful in the development of rehabilitative pedaling exercises. The objectives of this work were to (i) develop a forward dynamic model to simulate low-power pedaling in the recumbent position, (ii) use the model to quantify the power contributions of the muscles to driving the crank and limb segments, and (iii) determine whether there were differences in the muscle power contributions required to simulate recumbent pedaling at three different pedaling rates. A forward dynamic model was used to determine the individual muscle excitation amplitude and timing to drive simulations that best replicated experimental kinematics and kinetics of recumbent pedaling. The segment kinematics, pedal reaction forces, and electromyograms (EMG) of 10 muscles of the right leg were recorded from 16 subjects as they pedaled a recumbent ergometer at 40, 50, and 60 rpm and a constant 50 W workrate. Intersegmental joint moments were computed using inverse dynamics and the muscle excitation onset and offset timing were determined from the EMG data. All quantities were averaged across ten cycles for each subject and averaged across subjects. The model-generated kinematic and kinetic quantities tracked almost always within 1 SD of the experimental data for all three pedaling rates. The uniarticular hip and knee extensors generated 65 percent of the total mechanical work in recumbent pedaling. The triceps surae muscles transferred power from the limb segments to the crank and the bi-articular muscles that crossed the hip and knee delivered power to the crank during the leg transitions between flexion and extension. The functions of the individual muscles did not change with pedaling rate, but the mechanical energy generated by the knee extensors and hip flexors decreased as pedaling rate increased. By varying the pedaling rate, it is possible to manipulate the individual muscle power contributions to the crank and limb segments in recumbent pedaling and thereby design rehabilitative pedaling exercises to meet specific objectives.

Caffeine’s Beneficial Effect on Maximal Voluntary Strength and Activation in Uninjured but Not Injured Muscle

2008 ◽  
Vol 18 (6) ◽  
pp. 639-652 ◽  
Author(s):  
Nicole D. Park ◽  
Robert D. Maresca ◽  
Kimberly I. McKibans ◽  
D. Reid Morgan ◽  
Timothy S. Allen ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Muscle Activation ◽  
Eccentric Contraction ◽  
Knee Extensors ◽  
Double Blind ◽  
Maximal Voluntary Isometric Contraction ◽  
Caffeine Ingestion ◽  
Excitation Contraction Coupling ◽  
Contraction Coupling ◽  
Before And After

The study’s objective was to determine whether orally ingested caffeine could help overcome excitation-contraction-coupling failure, which has been suggested to explain part of the strength loss associated with eccentric-contraction-induced muscle injury. A sample of 13 college students (4 men and 9 women) was used in a double-blind, repeated-measures experimental design. Each participant performed 2 experimental trials, 1 with each leg, with each trial lasting 4 consecutive days. On a given day, each participant was randomly assigned to ingest a capsule containing 6 mg/kg of either caffeine or flour (placebo). On the day of and the first 2 days after a bout of 50 injurious eccentric contractions done by the knee extensors, the interpolated-twitch technique was used to assess electrically evoked strength, maximal voluntary isometric contraction (MVIC) strength, and percent muscle activation during MVIC both before and after capsule ingestion. These variables were also measured before and after capsule ingestion the day before the eccentric-contraction bout—when the muscle was uninjured. In injured muscle, caffeine had no effect on any variable. In uninjured muscle, caffeine also had no effect on electrically evoked strength but increased MVIC strength by 10.4% compared with placebo (p = .00002), and this was attributed to an increase in muscle activation (6.2%; p = .01). In conclusion, the data provide no evidence that caffeine ingestion can help overcome excitation-contraction-coupling failure, if it exists, in injured human muscle. The data do indicate that caffeine ingestion can increase MVIC strength and activation in uninjured muscle but not in injured muscle.

Can Muscle Power Be Estimated from Thigh Bulk Measurements? A Preliminary Study

1999 ◽  
Vol 8 (1) ◽  
pp. 50-59 ◽  
Author(s):  
Eric Maylia ◽  
John A. Fairclough ◽  
Leonard D.M. Nokes ◽  
Michael D. Jones
Keyword(s):  
Muscle Power ◽  
Tape Measure ◽  
Hamstring Muscles ◽  
Male Patients ◽  
Preliminary Study ◽  
Concentric Loading

The purpose of this study was to assess whether measurements of thigh bulk taken with a tape measure would give an indication of muscle power. Eleven male patients, all undergoing unilateral menisectomies, performed exercises of the quadriceps and hamstring muscles during concentric loading at 60°/s. The patients were tested three times over a 12-week period: one day before the operation and 2 and 12 weeks after the operation. Thigh girth was recorded, using a conventional plastic tape measure, 10 cm from the top of the patella in each of the three test sessions. The results of this study demonstrated that muscle power cannot be predicted from thigh girth measurements.

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