Isoload vs isokinetic eccentric exercise: a direct comparison of exercise-induced muscle damage and repeated bout effect

Coratella, Giuseppe; Bertinato, Luciano

doi:10.1007/s11332-014-0213-x

Cited by 32 publications

(40 citation statements)

References 41 publications

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“…We matched both intensity training and exercise time under tension, therefore resulting in a comparable training volume [15]. The angular velocity (i.e., the reciprocal of the time under tension) influences strength increases in untrained limb.…”

Section: Discussionmentioning

confidence: 99%

“…Then, after a separate DCER 1RM measurement, the obtained ratio was transferred to DCER training intensity. Therefore, IK exercise intensity, with average corresponding to 120 % of maximal isokinetic concentric peak torque, was compared with the 120 % of concentric 1RM, used in DCER [14,15]. Subsequently, to equalize the training volume, we equalized the number of sets and repetitions, the time under tension and the range of motion, as recommended in previous study [19].…”

Section: Methodsmentioning

confidence: 99%

“…Afterwards, additional load of 2.5 kg was added until subjects failed to lift the lever. Each 1RM attempt was separated by 60 s [15] and the untested limb was blocked by an operator. The participants received standardized encouragements by the operators.…”

Section: Rmmentioning

confidence: 99%

“…Studies that investigated the cross-education effect after unilateral eccentric-only training were designed using both isokinetic [12,13] or dynamic constant external resistance [10,11]. We already have directly compared the effects of eccentriconly isokinetic vs dynamic constant external resistance on exercise-induced muscle damage and repeated bout effect [15] and training-induced changes on the trained limb [14]. However, to our knowledge, no study investigated the training-induced changes on the untrained limb.…”

Section: Introductionmentioning

confidence: 99%

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Cross-education effect after unilateral eccentric-only isokinetic vs dynamic constant external resistance training

2015

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The aim of this study was to evaluate the effects of unilateral eccentric training using constant velocity or constant external load on untrained limb. Fortynine participants were randomized in isokinetic (IK), dynamic constant external resistance (DCER) unilateral eccentric training or control groups. Knee-extension 1RM and isometric, eccentric and concentric knee extensors' peak torques, as well as changes in vastus lateralis muscle thickness, fascicle length, pennation angle and quadriceps fat-free mass were measured. After training, both IK and DCER similarly increased over time 1RM (respectively, ?3.6 kg, CI 95 % 0.6-6.5 and ?4.3 kg, CI 95 % 1.6-6.9), concentric (respectively, ?8.4 N/m, CI 95 % 0.0 to ?16.4 and 9.8 CI 95 % 0.6-19.2), eccentric (respectively, ?28.5 N/m, CI 95 % 11.0 to ?46.0 and 21.1 CI 95 % 15.1-37.0), and isometric (respectively, ?15.4 N/m,, CI 95 % 0.3-27.5) peak torques. No increase was found for vastus lateralis muscle thickness, fascicle length, pennation angle and quadriceps fatfree mass. Eccentric training was effective for inducing strength, but not structural, adaptations in untrained limb. Both in rehabilitation and training practice, use of easily available gym devices can be a good substitute for expensive and often unavailable isokinetic devices.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Rmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Cross-education effect after unilateral eccentric-only isokinetic vs dynamic constant external resistance training

2015

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“…Remarkably, resistance exercises usually consist of performing both the concentric and eccentric phases. Interestingly, performing repetitive eccentric phases incur into specific short-term [ 15 , 16 ] and long-term training-induced effects [ 1 , 17 , 18 ] compared to concentric-based training. Hence, examining the muscle activation in LR variations and frontal raise during both the concentric and the eccentric phase could further differentiate the training stimuli through an accentuation of the concentric or eccentric phase.…”

Section: Introductionmentioning

confidence: 99%

An Electromyographic Analysis of Lateral Raise Variations and Frontal Raise in Competitive Bodybuilders

Coratella

Tornatore

Longo

et al. 2020

IJERPH

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The present study examined the muscle activation in lateral raise with humerus rotated externally (LR-external), neutrally (LR-neutral), internally (LR-internal), with flexed elbow (LR-flexed) and frontal raise during both the concentric and eccentric phase. Ten competitive bodybuilders performed the exercises. Normalized surface electromyographic root mean square (sEMG RMS) was obtained from anterior, medial, and posterior deltoid, pectoralis major, upper trapezius, and triceps brachii. During the concentric phase, anterior deltoid and posterior deltoid showed greater sEMG RMS in frontal raise (effect size (ES)-range: 1.78/9.25)) and LR-internal (ES-range: 10.79/21.34), respectively, vs. all other exercises. Medial deltoid showed greater sEMG RMS in LR-neutral than LR-external (ES: 1.47 (95% confidence-interval—CI: 0.43/2.38)), frontal raise (ES: 10.28(95% CI: 6.67/13.01)), and LR-flexed (ES: 6.41(95% CI: 4.04/8.23)). Pectoralis major showed greater sEMG RMS in frontal raise vs. all other exercises (ES-range: 17.2/29.5), while upper trapezius (ES-range: 2.66/7.18) and triceps brachii (ES-range: 0.41/3.31) showed greater sEMG RMS in LR-internal vs. all other exercises. Similar recruitment patterns were found during the eccentric phase. When humerus rotates internally, greater activation of posterior deltoid, triceps brachii, and upper trapezius occurs. Humerus external rotation increases the activation of anterior and medial deltoid. Frontal raise mainly activates anterior deltoid and pectoralis major. LR variations and frontal raise activate specifically shoulders muscles and should be proposed accordingly.

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Downhill running increases markers of muscle damage and impairs the maximal voluntary force production as well as the late phase of the rate of voluntary force development

Coratella,

Varesco,

Rozand

et al. 2024

Eur J Appl Physiol

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Purpose To examined the time-course of the early and late phase of the rate of voluntary force development (RVFD) and muscle damage markers after downhill running. Methods Ten recreational runners performed a 30-min downhill run at 10 km h−1 and −20% (−11.3°) on a motorized treadmill. At baseline and each day up to 4 days RVFD, knee extensors maximum voluntary isometric force (MVIC), serum creatine kinase (CK) concentration, quadriceps swelling, and soreness were assessed. The early (0–50 ms) and late (100–200 ms) phase of the RVFD, as well as the force developed at 50 and 200 ms, were also determined. Results MVIC showed moderate decrements (p < 0.05) and recovered after 4 days (p > 0.05). Force at 50 ms and the early phase were not impaired (p > 0.05). Conversely, force at 200 ms and the late phase showed moderate decrements (p < 0.05) and recovered after 3 and 4 days, respectively (p > 0.05). CK concentration, quadriceps swelling, and soreness increased (p < 0.05) were overall fully resolved after 4 days (p > 0.05). Conclusion Downhill running affected the knee extensors RVFD late but not early phase. The RVFD late phase may be used as an additional marker of muscle damage in trail running.

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Isoload vs isokinetic eccentric exercise: a direct comparison of exercise-induced muscle damage and repeated bout effect

Cited by 32 publications

References 41 publications

Cross-education effect after unilateral eccentric-only isokinetic vs dynamic constant external resistance training

Cross-education effect after unilateral eccentric-only isokinetic vs dynamic constant external resistance training

An Electromyographic Analysis of Lateral Raise Variations and Frontal Raise in Competitive Bodybuilders

Downhill running increases markers of muscle damage and impairs the maximal voluntary force production as well as the late phase of the rate of voluntary force development

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