scholarly journals The Residual Effect of Prior Drop Jumps on EMG Parameters of Thigh Muscles during Moderate and Heavy Cycling

2018 ◽  
Vol 2 (85) ◽  
Author(s):  
Neringa Baranauskienė ◽  
Loreta Stasiulė ◽  
Sandra Raubaitė ◽  
Arvydas Stasiulis
Keyword(s):  
Muscle Soreness ◽  
Vastus Lateralis ◽  
Residual Effect ◽  
Vastus Medialis ◽  
Mean Square ◽  
Cycling Exercise ◽  
Delayed Onset ◽  
Concentric Exercise ◽  
Thigh Muscles ◽  
Drop Jumps

Research  background  and  hypothesis.  Prior  eccentric  or  eccentric-concentric  exercise  induces  long  lasting muscle fatigue and delayed onset muscle soreness (DOMS). Moreover, the surface electromyograme sEMG amplitude increases under fatigue conditions. We suppose that prior eccentric – concentric exercise, inducing DOMS, increases EMG amplitude of thigh muscles during constant cycling exercises.Research aim of the study was to assess the residual effect of 100 prior drop jumps (PDJ) on the sEMG of m. vastus lateralis and m. vastus medialis during moderate and heavy intensity cycling exercises. Research methods. On four different days 10 female students performed one increasing and three (control, 45  min and 24 h after 100 drop jumps) moderate and heavy cycling (Ergoline-800, Germany) exercises. The cadence of cycling was 70 rpm. The sEMG of right thigh m. vastus lateralis and m. vastus medialis were continuously recorded during moderate and heavy cycling exercise. Creatine kinasis activity was measured and DOMS was rated 24 h after PDJ. Research results. After 24 h the subjects felt moderate DOMS (5.0 (2.79)) according to 10 point scale. The sEMG root mean square amplitude of m. vastus lateralis significantly increased 24 h after PDJ during moderate, but unaltered during heavy cycling exercise under fatigue conditions (45 min and 24 h after PDJ).Discussion and conclusion. Prior drop jumps seem to have significant residual (within 24 h of recovery) effect on EMG of thigh muscles during moderate cycling exercise in female students.Keywords: delayed onset muscle soreness, constant load, EMG root mean square.

scholarly journals The Residual Effect of Prior Drop Jumps on Cardio Respiratory Parameters during Moderate Cycling in Young Women

2018 ◽  
Vol 3 (86) ◽  
Author(s):  
Neringa Baranauskienė ◽  
Arvydas Stasiulis
Keyword(s):  
Oxygen Uptake ◽  
Respiratory System ◽  
Muscle Soreness ◽  
Residual Effect ◽  
Delayed Onset Muscle Soreness ◽  
Cycling Exercise ◽  
System Parameters ◽  
Delayed Onset ◽  
Respiratory Parameters ◽  
Drop Jumps

Research background and hypothesis. Unaccustomed prior drop jumps (PDJ) can cause muscle damage with  concomitant delayed onset muscle soreness (DOMS) and decreased concentric contraction performance efficiency,  but  the  residual  effect  of  PJD  on  cardio  respiratory  system  parameters  during  moderate  cycling  exercise  (MC) remains equivocal. We suppose that DOMS, induced of PDJ, has altered cardio respiratory system parameters during  MC exercises.Research aim of the study was to assess the residual effect of 100 prior drop jumps on cardio respiratory system  parameters kinetics during moderate cycling exercise. Research methods. On four different days 10 women performed one increasing and three (control, 45 min and  24 h after 100 drop jumps) MC (Ergoline-800, Germany) exercises. The cadence of cycling was 70 rpm. The oxygen  uptake (2 oV& ), carbon dioxide output (2 co V & ); minute ventilation ( E V ) and heart rate (HR) were continuously recorded  during MC. Subjects rated their perceived exertions at the end of MC, and the DOMS was rated 24 h after PDJ. Research results. After 24 h the subjects felt moderate DOMS (5.0(2.79)) according to 10 point scale. The 2 oV& ; 2 co V & and HR kinetics were unaltered by moderate DOMS after 45 minutes and 24 hours, but  E V tended to increase 45  minutes after PDJ. The negative correlation between DOMS and  2 oV&  (r = –0.52) was observed.Discussion and conclusion. Prior drop jumps seem not to have significant residual effect on cardio respiratory  parameters kinetics after 45 minutes or 24 hours, but they tend to increase  E V  after 45 minutes of recovery during  moderate cycling exercise in young women.Keywords: delayed onset muscle soreness, oxygen uptake, constant load.

Reciprocal Coactivation Patterns of the Lateral and Medial Quadriceps and Hamstrings during Low- and Moderate-Speed Isokinetic Movement

1998 ◽  
Vol 7 (3) ◽  
pp. 182-196 ◽  
Author(s):  
Ronald V. Croce ◽  
John P. Miller ◽  
Robert Confessore ◽  
James C. Vailas
Keyword(s):  
Knee Joint ◽  
Female Athletes ◽  
Vastus Lateralis ◽  
Biceps Femoris ◽  
Median Frequency ◽  
Vastus Medialis ◽  
Mean Square ◽  
Joint Movement ◽  
Surface Electrodes ◽  
Emg Patterns

The purpose of this study was to examine coactivation patterns of the lateral and medial quadriceps and the lateral and medial hamstrings during low- and moderate-speed isokinetic movements. Twelve female athletes performed isokinetic knee assessments at 60 and 180°/s. Root mean square electromyographic (rmsEMG) activity and the median frequency of the EMG (mfEMG) were determined by placing bipolar surface electrodes on the vastus lateralis (VL), vastus medialis (VM), biceps femoris (BF), and medial hamstrings (MH). Results of rmsEMG indicated that the VM showed almost twice the coactivation of the VL (p< .05), and that the BF showed almost four times the coactivation of the MH (p <.05). Finally, differences were noted in the mfEMG (p< .05), with the VM displaying different recruitment patterns at 180°/s as an agonist compared to that as an antagonist. Results indicated that when acting as antagonists, the VM and BE display the greatest EMG patterns during isokinetic knee joint movement.

scholarly journals Exploratory study of electromyographic behavior of the vastus medialis and vastus lateralis at neuromuscular fatigue onset

2014 ◽  
Vol 20 (2) ◽  
pp. 213-220 ◽  
Author(s):  
Cristiano Rocha da Silva ◽  
Danilo de Oliveira Silva ◽  
Deisi Ferrari ◽  
Rúben de Faria Negrão Filho ◽  
Neri Alves ◽  
...  
Keyword(s):  
Exploratory Study ◽  
Vastus Lateralis ◽  
Knee Extension ◽  
Neuromuscular Fatigue ◽  
Isometric Contractions ◽  
Median Frequency ◽  
Vastus Medialis ◽  
Mean Square ◽  
Electromyographic Signal ◽  
The Moment

This study aimed to determine and analyze the neuromuscular fatigue onset by median frequency (MDF) and the root mean square (RMS) behavior of an electromyographic signal (EMG). Eighteen healthy men with no prior knee problems initially performed three maximum voluntary isometric contractions (MVIC). After two days of MVIC test, participants performed a fatiguing protocol in which they performed submaximal knee-extension contractions at 20% and 70% MVIC held to exhaustion. The MDF and RMS values from the EMG signals were recorded from the vastus medialis (VM) and the vastus lateralis (VL). Analysis of the MDF and RMS behavior enabled identification of neuromuscular fatigue onset for VM and VL muscles in 20% and 70% loads. Alterations between the VM and VL in the neuromuscular fatigue onset, at 20% and 70% MVIC, were not significant. These findings suggest that the methodology proposal was capable of indicating minute differences sensible to alterations in the EMG signals, allowing identification of the moment when the MDF and the RMS showed significant changes in behavior. The methodology used was also a viable one for describing and identifying the neuromuscular fatigue onset by means of the analysis of EMG signals.

Untersuchung zur Wirkung von Kinesio-Tape und IQ-Tape auf die neuromuskuläre Aktivität beim Joggen, Treppensteigen und Drop-Jump

2020 ◽  
Vol 34 (02) ◽  
pp. 96-104
Author(s):  
Slavko Rogan ◽  
Heiner Baur
Keyword(s):  
Body Mass Index ◽  
Tibialis Anterior ◽  
Vastus Lateralis ◽  
Vastus Medialis ◽  
Drop Jump ◽  
Kinesio Tape ◽  
Gastrocnemius Medialis ◽  
Subject Design ◽  
Drop Jumps ◽  
G Ratio

ZusammenfassungHintergrund Applikationen mit elastischem Tape werden positive Wirkungen auf die Bewegung zugeschrieben. Unter anderem werden Attribute wie stoffwechselanregend, entstauend, kräftigend und schmerzlindernd genannt. Das Ziel dieser Interventionsstudie mit einem Within-Subject-Design war die Untersuchung verschiedener elastischer Tapes (Kinesiotape – KT, IQ-Tape – IQ, ohne Tape: OT) auf die neuromuskuläre Aktivierung der Beuge- und Streckkette der unteren Extremität während des Joggens, des Treppensteigens und bei Drop Jumps. Probanden/Methodik Achtzehn gesunde Erwachsene (5 Männer und 13 Frauen) mit einem Durchschnittsalter von 26,3 ± 3,6 Jahren und einem Body-Mass-Index von 22,3 ± 0,7 kg/m2 wurden rekrutiert. Die Teilnehmer absolvierten Laufintervalle mit 10 km/h, 12 km/h und 15 km/h, Treppensteigen und Drop Jumps (10 Versuche). Die Muskelaktivierung des M. vastus medialis und M. vastus lateralis, des M. bizeps femoris, des M. semitendionosus, des M. tibialis anterior, M. gastrocnemius medialis und lateralis wurden erhoben, um das Verhältnis der Muskelaktivierung des M. tibialis anterior zu M. gastrocnemius medialis und lateralis (T/G-ratio) und des M. vastus medialis und lateralis zum M. bizeps femoris und M. semitendinosus (V/I-ratio) zum Zeitpunkt vor (–150 bis 0 ms pre), während (0–30 ms post) und von 30 ms bis 150 ms post der ersten Bodenkontaktaufnahme mit Hilfe elektromyografischer Messungen darzustellen. Die statistische Prüfung erfolgte mittels des nonparametrischen L-Puri-Sen-Verfahrens. Das Signifikanzniveau wurde auf p < 0,05 gesetzt. Ergebnisse Zwei Probanden schieden während der Datenaufnahme aus der Studie aus. Damit konnten von 16 Probanden Daten analysiert werden. Beim Treppenheruntersteigen zeigt IQT in der Voraktivierung (–150 bis 0 ms) vor dem ersten Bodenkontakt einen signifikant erhöhten T/G-ratio im Vergleich zu OT (p = 0,01). Die restlichen Vergleiche von Applikationen mit KT, IQT und OT ergaben keine signifikanten Unterschiede (p > 0,05). Schlussfolgerung Es kann davon ausgegangen werden, dass Kinesiotape – KT und IQ-Tape – IQ keine relevanten detektierbaren Änderungen der Muskelaktivierung bei gesunden Personen hervorrufen. Zukünftige Studien sollten Patienten einschließen, die eine pathologisch veränderte neuromuskuläre Kontrolle aufweisen.

scholarly journals Gender differences in residual effect of prior drop jumps on oxygen uptake during heavy cycling exercise

Medicina ◽  
2017 ◽  
Vol 53 (5) ◽  
pp. 331-338 ◽  
Author(s):  
Neringa Baranauskienė ◽  
Sandra Kilikevičienė ◽  
Loreta Stasiulė ◽  
Genuvaitė Civinskienė ◽  
Arvydas Stasiulis
Keyword(s):  
Gender Differences ◽  
Oxygen Uptake ◽  
Residual Effect ◽  
Cycling Exercise ◽  
Drop Jumps

scholarly journals Fast-Velocity Eccentric Cycling Exercise Causes Greater Muscle Damage Than Slow Eccentric Cycling

2020 ◽  
Vol 11 ◽  
Author(s):  
Hisashi Ueda ◽  
Yosuke Tsuchiya ◽  
Eisuke Ochi
Keyword(s):  
Muscle Damage ◽  
Muscle Soreness ◽  
Vastus Lateralis ◽  
Rectus Femoris ◽  
Muscle Stiffness ◽  
Echo Intensity ◽  
Thigh Circumference ◽  
Cycling Exercise ◽  
Significant Difference ◽  
Slow Velocity

This study aims to investigate muscle damage occurring in the early and recovery phases after fast-velocity and slow-velocity eccentric cycling. Eleven untrained men (age, 20.0 ± 1.7 years; height, 171.3 ± 6.8 cm; weight, 61.8 ± 7.7 kg; and %body fat, 13.2 ± 2.9%) performed slow-velocity maximal isokinetic eccentric cycling (slow-velocity; 30°/s) with one leg and fast-velocity (fast-velocity; 210°/s) isokinetic eccentric cycling with the other leg. Changes in maximal voluntary isokinetic concentric contraction (MVCC) torque at velocities of 30 and 210°/s, range of motion (ROM), and muscle soreness were assessed by pressure using a digital muscle stiffness instrument; thigh circumference, muscle echo intensity, and muscle stiffness were assessed before exercise, and immediately after exercise, 1 day, and 4 days after exercise. Comparing with the results obtained for slow-velocity cycling (post: 215.9 ± 32.3 Nm, day 1: 192.9 ± 47.4 Nm, day 4: 184.3 ± 47.2 Nm) and before exercise, MVCC after fast-velocity cycling significantly decreased at immediately (160.4 ± 43.5 Nm), 1 day (143.6 ± 54.1 Nm), and 4 days (150.1 ± 44.5 Nm) after exercise (p &lt; 0.05). Significant increase in muscle soreness for vastus lateralis was observed after fast-velocity cycling (41.2 ± 16.9 mm) compared with slow-velocity cycling (23.7 ± 12.2 mm) 4 days after exercise (p &lt; 0.05). However, no significant difference in muscle soreness was observed for rectus femoris and vastus medialis at any time points after exercise. In addition, no significant differences were observed in the ROM, thigh circumference, muscle echo intensity, and muscle stiffness. In conclusion, fast-velocity eccentric cycling causes a decrease in muscle strength and an increase in soreness as compared to slow-velocity eccentric cycling.

Delayed Onset Muscle Soreness: What Is It and How Do We Treat It?

1996 ◽  
Vol 5 (3) ◽  
pp. 234-243 ◽  
Author(s):  
Dawn T. Gulick ◽  
Iris F. Kimura
Keyword(s):  
Muscle Function ◽  
Muscle Soreness ◽  
Muscle Spasm ◽  
Delayed Onset Muscle Soreness ◽  
Tissue Fluid ◽  
Transcutaneous Electrical Stimulation ◽  
Delayed Onset ◽  
Concentric Exercise ◽  
By Products ◽  
Time Of Administration

Muscle soreness, a familiar phenomenon to most athletes, has been differentiated into “acute” and “delayed onset.” The etiology of acute muscle soreness has been attributed to ischemia and the accumulation of metabolic by-products. However, the etiology of delayed onset muscle soreness (DOMS) is not so clear. Six theories have been proposed: lactic acid, muscle spasm, torn tissue, connective tissue, enzyme efflux, and tissue fluid theories. The treatment of DOMS has also been investigated. Studies in which anti-inflammatory medications have been administered have yielded varying results based on the dosage and the time of administration. Submaximal concentric exercise may alleviate soreness but does not restore muscle function. Neither cryotherapy nor stretching abates the symptoms of DOMS. Transcutaneous electrical stimulation has been shown to decrease soreness and increase range of motion, but the effect on the recovery of muscle function is unknown. Therefore, the treatment of DOMS remains an enigma.

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