Hamstrings and Quadriceps Muscles Function in Subjects with Prior ACL Reconstruction Surgery

Faxon, Jamie L.; Sanni, Adeola A.; McCully, Kevin K.

doi:10.3390/jfmk3040056

Cited by 8 publications

(10 citation statements)

References 28 publications

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“…Previous studies have used accelerometry to study muscle contractile function [22,23]. In addition, an accelerometer has been used to evaluate muscle endurance as changes in twitch contraction speeds [10][11][12]14,15]. These studies have shown a good relationship between muscle accelerometry and muscle mitochondrial capacity in clinical populations [14].…”

Section: Discussionmentioning

confidence: 99%

“…Muscle endurance was measured using a 5 min stimulation protocol, similar to a previously published nine-minute endurance protocol [10][11][12]14,15]. Custom-made foil electrodes were placed on the neck and ultrasound gel was placed underneath the electrodes.…”

Section: Endurance Testmentioning

confidence: 99%

“…Subcutaneous ATT (adipose tissue thickness) was assessed using ultrasound B-mode imaging (LOGIQe; GE Healthcare, Chicago, IL, USA) with musculoskeletal scanning pre-set and a multifrequency linear transducer (8)(9)(10)(11)(12). The placement of the accelerometer on the neck and quadriceps was marked and then a static ultrasound image was taken.…”

Section: Adipose Tissue Thickness (Att)mentioning

confidence: 99%

“…Assessment of muscle endurance using involuntary twitch contractions involves measuring changes in muscle acceleration of the twitch contractions over a given time. This approach has been used to characterize muscle endurance in various human muscles [11][12][13]. The present study evaluated specific muscle endurance using twitch contractions and accelerometry in two muscles located in the neck; the SCM and the trap muscles, and compared them to the vastus lateralis (VL) muscle in the leg.…”

Section: Introductionmentioning

confidence: 99%

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Endurance of the Dorsal and Ventral Muscles in the Neck

Liss

Sanni

McCully

2020

JFMK

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Endurance of the muscles of the neck are rarely studied. This study measured the endurance index (EI) of the sternocleidomastoid (SCM) and upper trapezius muscles of the neck (trap). The vastus lateralis (VL) was used for comparison. Skeletal muscle endurance of twelve healthy subjects, age 19–22 years, were tested on their SCM and trap in random order on one day, VL was tested on a separate day. Participants were tested in the supine position for the SCM and VL muscles and the prone position for the trap. Muscle contractions consisted of a 5 Hz twitch electrical stimulation for 5 min. Muscle acceleration (resultant vector) was measured using a triaxial accelerometer. EI was the ending acceleration as a percentage of the maximal acceleration. The endurance index (EI) for the SCM, trap, and VL was 42.3 ± 13.0%, 42.3 ± 20.2%, and 92.9 ± 11.0%, respectively. The EI of the VL was significantly higher than the EI of the SCM (t(2,22) = 10.33, p < 0.001) and the trap (t(2,22) = 7.625, p < 0.001). The EI was not different between the SCM and the trap muscle (t(2,22) = 0.004, p = 0.997). In conclusion, the neck muscles had much less endurance than the muscles in the leg and could make fatigued athletes more susceptible to concussions caused by head impacts.

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Section: Discussionmentioning

confidence: 99%

Section: Endurance Testmentioning

confidence: 99%

Section: Adipose Tissue Thickness (Att)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Endurance of the Dorsal and Ventral Muscles in the Neck

Liss

Sanni

McCully

2020

JFMK

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“…The amount of acceleration remaining as a percentage of the initial highest acceleration has been called the endurance index. This approach has subsequently been used to evaluate skeletal muscle in a number of clinical populations 2,9,10 . In addition, the twitch endurance test has been applied to a number of different muscle groups 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Video Camera Analysis to Capture Muscle Specific Endurance

Hooks¹,

McCully²

2021

MRAJ

Self Cite

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Previous studies have used an accelerometer to evaluate muscle endurance. This study compared endurance index values using a video phone to an accelerometer. Eleven healthy subjects (19-22yrs) were electrically stimulated for 5 minutes at 5 Hz on the hamstring muscles. Four 10s videos were captured at 1080p and 60fps (~283,000 pixels) with the phone. Videos were analyzed using sequential correlations (consecutive 1-2, or consecutive skipping an image 1–3) of the video images between the electrodes. The magnitude of the decrease in the correlation was used to indicate movement. A triaxial accelerometer measured the resultant vector of the movements and the decrease in acceleration was used to indicate fatigue. Analysis using 1-3 produced higher delta R2 values compared to 1-2 (0.038+0.004; 0.020+0.001). Endurance index was 72.1+19.4% for the accelerometer and 71.1+18.6% for the phone images, p=0.64. The mean difference between the methods was not different from zero and the 90% confidence interval was within 5%. In conclusion, the consecutive correlations method detected decreases in movement due to fatigue. The video method provided equivalent values to the previously established accelerometer method to measure muscle endurance. These results support the use of video to assess muscle acceleration during muscle specific endurance test.

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The use of technology in the assessment and monitorization of a season in a professional padel player: A case study

Carnero-Diaz,

Pecci,

Reverte-Pagola

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part P:

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Training process in elite padel players is influenced by travels and competitions density. The irregularity in the workloads, as well as demands of the season, could affect the musculoskeletal structures. Strength training has a protective role against the injury incidence, but the competitive context does not always allow adequate periodization of training and thus achieve adaptations. The aim of this study is to analyze, using technological tools, if improvements in player’s fitness are accompanied by improvements in sport performance through a case study. An elite padel player was analyzed during the 2021 season. Physical fitness was evaluated using different technological tools. Athlete monitoring was carried out using self-reported forms and sport performance was assessed through the results obtained in the World Padel Tour ranking at the end of the season. During the training process, multidimensional training was carried out in order to achieve the maximum availability of specific loads through coadjuvant training. Results of the assessment show slight improvements in all fitness tests. Assessment of sport performance reports an increased number of victories and a better position in the professional ranking. Musculoskeletal improvements helped the athlete’s workload tolerance, allowing overall improvement in padel performance. The training approach from this study has shown to be effective in maintaining or even improving force-producing capacity in lower and upper limbs, force-velocity relationship, agility and sport performance, despite the high competitive density. This work provides coaches with a practical approach to assess, monitor and design a competitive season for an elite padel player.

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Hamstrings and Quadriceps Muscles Function in Subjects with Prior ACL Reconstruction Surgery

Cited by 8 publications

References 28 publications

Endurance of the Dorsal and Ventral Muscles in the Neck

Endurance of the Dorsal and Ventral Muscles in the Neck

Video Camera Analysis to Capture Muscle Specific Endurance

The use of technology in the assessment and monitorization of a season in a professional padel player: A case study

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