| Title |
EMG amplitude of the biceps femoris during jumping compared to landing movements
|
|---|---|
| Published in |
SpringerPlus, October 2013
|
| DOI | 10.1186/2193-1801-2-520 |
| Pubmed ID | |
| Authors |
Johnny Padulo, Alessandra Tiloca, Douglas Powell, Giampietro Granatelli, Antonino Bianco, Antonio Paoli |
| Abstract |
Hamstrings injury is a common occurrence in athletic performance. These injuries tend to occur during a deceleration or landing task suggesting the negative work may be a key component in hamstrings injury. The purpose of this study was to investigate the muscular activity (EMG) of the biceps femoris (BF) in different phases (concentric vs. eccentric) of a Counter Movement Jump (CMJ), Squat Jump (SJ) and the Braking Phase (BP) of a landing task. Twelve female volleyball players performed 5 CMJs, SJs and BPs while surface EMG was recorded using a MuscleLab (BoscoSystem(TM), Norway). EMG values were normalized to an maximal voluntary contraction. A repeated measures analysis of variance (ANOVA) was used to compare mean normalized EMG values of the concentric and eccentric portions of the CMJ with the BP and SJ. The ANOVA revealed significantly lower BF activation in the concentric and eccentric portions of the CMJ compared to the BP (64%, p < 0.001) and SJ (7%, p = 0.02), respectively. These findings suggest that the CMJ relies on a greater contribution of elastic tissues during the concentric and eccentric portions of the movement and thus requires less muscle activation of the BF. |
X Demographics
The data shown below were collected from the profiles of 5 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 2 | 40% |
| Spain | 1 | 20% |
| Unknown | 2 | 40% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Scientists | 3 | 60% |
| Members of the public | 2 | 40% |
Mendeley readers
The data shown below were compiled from readership statistics for 196 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Denmark | 1 | <1% |
| Singapore | 1 | <1% |
| Brazil | 1 | <1% |
| Unknown | 193 | 98% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Bachelor | 32 | 16% |
| Student > Master | 31 | 16% |
| Student > Ph. D. Student | 25 | 13% |
| Researcher | 13 | 7% |
| Student > Doctoral Student | 11 | 6% |
| Other | 35 | 18% |
| Unknown | 49 | 25% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 78 | 40% |
| Medicine and Dentistry | 18 | 9% |
| Nursing and Health Professions | 9 | 5% |
| Engineering | 9 | 5% |
| Agricultural and Biological Sciences | 5 | 3% |
| Other | 17 | 9% |
| Unknown | 60 | 31% |
Attention Score in Context
This research output has an Altmetric Attention Score of 4. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 11 April 2018.
All research outputs
#7,189,800
of 22,725,280 outputs
Outputs from SpringerPlus
#456
of 1,853 outputs
Outputs of similar age
#67,073
of 209,651 outputs
Outputs of similar age from SpringerPlus
#25
of 106 outputs
Altmetric has tracked 22,725,280 research outputs across all sources so far. This one has received more attention than most of these and is in the 67th percentile.
So far Altmetric has tracked 1,853 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.7. This one has gotten more attention than average, scoring higher than 73% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 209,651 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 66% of its contemporaries.
We're also able to compare this research output to 106 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 74% of its contemporaries.