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Exploratory Investigation of Impact Loads During the Forward Handspring Vault.

Penitente G, Sands WA - J Hum Kinet (2015)

Bottom Line: These vaults were compared via crucial kinetic and kinematic variables using independent t-tests and Pearson correlations.Statistically significant (p < 0.001) differences were observed in peak force (t(24) = 4.75, ES = 3.37) and time to peak force (t(24) = 2.07, ES = 1.56).Statistically significant relationships between the loading rate and time to peak force were observed for high intensity loads.

View Article: PubMed Central - PubMed

Affiliation: Academy of Sport and Physical Activity, Sheffield Hallam University, Sheffield, UK.

ABSTRACT
The purpose of this study was to examine kinematic and kinetic differences in low and high intensity hand support impact loads during a forward handspring vault. A high-speed video camera (500 Hz) and two portable force platforms (500 Hz) were installed on the surface of the vault table. Two-dimensional analyses were conducted on 24 forward handspring vaults performed by 12 senior level, junior Olympic program female gymnasts (16.9 ±1.4 yr; body height 1.60 ±0.1 m; body mass 56.7 ±7.8 kg). Load intensities at impact with the vault table were classified as low (peak force < 0.8 × body weight) and high (peak force > 0.8 × body weight). These vaults were compared via crucial kinetic and kinematic variables using independent t-tests and Pearson correlations. Statistically significant (p < 0.001) differences were observed in peak force (t(24) = 4.75, ES = 3.37) and time to peak force (t(24) = 2.07, ES = 1.56). Statistically significant relationships between the loading rate and time to peak force were observed for high intensity loads. Peak force, time to peak force, and a shoulder angle at impact were identified as primary variables potentially involved in the determination of large repetitive loading rates on the forward handspring vault.

No MeSH data available.


Sample, hand-support phase force-time data for the High (left) and Low (right) Load Intensity groups. The continuous and dashed lines represent the vertical (Fz) and anterior-posterior (Fx) forces, respectively.
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f3-jhk-46-59: Sample, hand-support phase force-time data for the High (left) and Low (right) Load Intensity groups. The continuous and dashed lines represent the vertical (Fz) and anterior-posterior (Fx) forces, respectively.

Mentions: Based on the split median method, data were divided in two groups. The first group was formed by those forward handsprings that showed impact peak force magnitudes less than 0.8 BW (LI group), operationally defined as ‘low intensity load’. The second group was determined by impact peak force greater than 0.8 BW (HI group), operationally defined as ‘high intensity load’ (Markolf et al., 1990) (Figure 3).


Exploratory Investigation of Impact Loads During the Forward Handspring Vault.

Penitente G, Sands WA - J Hum Kinet (2015)

Sample, hand-support phase force-time data for the High (left) and Low (right) Load Intensity groups. The continuous and dashed lines represent the vertical (Fz) and anterior-posterior (Fx) forces, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4519222&req=5

f3-jhk-46-59: Sample, hand-support phase force-time data for the High (left) and Low (right) Load Intensity groups. The continuous and dashed lines represent the vertical (Fz) and anterior-posterior (Fx) forces, respectively.
Mentions: Based on the split median method, data were divided in two groups. The first group was formed by those forward handsprings that showed impact peak force magnitudes less than 0.8 BW (LI group), operationally defined as ‘low intensity load’. The second group was determined by impact peak force greater than 0.8 BW (HI group), operationally defined as ‘high intensity load’ (Markolf et al., 1990) (Figure 3).

Bottom Line: These vaults were compared via crucial kinetic and kinematic variables using independent t-tests and Pearson correlations.Statistically significant (p < 0.001) differences were observed in peak force (t(24) = 4.75, ES = 3.37) and time to peak force (t(24) = 2.07, ES = 1.56).Statistically significant relationships between the loading rate and time to peak force were observed for high intensity loads.

View Article: PubMed Central - PubMed

Affiliation: Academy of Sport and Physical Activity, Sheffield Hallam University, Sheffield, UK.

ABSTRACT
The purpose of this study was to examine kinematic and kinetic differences in low and high intensity hand support impact loads during a forward handspring vault. A high-speed video camera (500 Hz) and two portable force platforms (500 Hz) were installed on the surface of the vault table. Two-dimensional analyses were conducted on 24 forward handspring vaults performed by 12 senior level, junior Olympic program female gymnasts (16.9 ±1.4 yr; body height 1.60 ±0.1 m; body mass 56.7 ±7.8 kg). Load intensities at impact with the vault table were classified as low (peak force < 0.8 × body weight) and high (peak force > 0.8 × body weight). These vaults were compared via crucial kinetic and kinematic variables using independent t-tests and Pearson correlations. Statistically significant (p < 0.001) differences were observed in peak force (t(24) = 4.75, ES = 3.37) and time to peak force (t(24) = 2.07, ES = 1.56). Statistically significant relationships between the loading rate and time to peak force were observed for high intensity loads. Peak force, time to peak force, and a shoulder angle at impact were identified as primary variables potentially involved in the determination of large repetitive loading rates on the forward handspring vault.

No MeSH data available.