The acute effect of maximal voluntary isometric contraction pull on start gate performance of snowboard and ski cross athletes

Haycraft, Jade Alexandra Ziems; Gastin, P.; Robertson, Sam

doi:10.1177/1747954116667110

Cited by 2 publications

(2 citation statements)

References 37 publications

(68 reference statements)

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“…In addition, for snowboard cross, taller and heavier athletes have an advantage when they come into contact or collide with their opponents during the competition. Haycraft et al (14) and Spasić et al (31) confirmed that a heavier athlete could increase the normal force resulting in higher friction, which will reduce snowboarding athletes' velocity, but higher body mass would also produce a higher Fg sinα component at the same time, which is bigger than the increase in friction (Figure 2). Therefore, under the same conditions, athletes with heavier mass glide faster, and the results are better.…”

Section: Resultsmentioning

confidence: 91%

Anthropometric, Physiological, and Physical Profile of Elite Snowboarding Athletes

Wang

Zhong

Wang

2022

Strength &Amp; Conditioning Journal

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A successful snowboarding performance is a multifactorial accomplishment resulting from a complex interaction of the major fitness components. This review aimed to examine the anthropometric, physiological, and physical profiles of elite snowboarding athletes. A database search was performed in the China National Knowledge Infrastructure, PubMed, SPORT Discus, and Web of Science. The findings indicate that (a) elite speed-based and skill-based athletes generally had low body fat percentages. The height and body mass of men speed-based athletes are slightly larger than those of skill-based athletes. (b) The energy system predominantly engaged in is anaerobic metabolism. Muscle oxidative metabolism could help to promote recovery in the repeated high-intensity runs. (c) Top levels of lower-body strength, especially the eccentric force production and explosive concentric power production of athletes, have a determinant role in rapid riding and turning, jump amplitude, trick difficulty, and successful landing. The take-off velocity of skill-based snowboarding and the starting and turning speed of speed-based snowboarding also have a major effect on success in competitions. Further research is warranted to investigate the anthropometry, the relative energy system contributions from aerobic and anaerobic metabolism, and the effect of physical training on performance while considering the possible differentiated effects of different snowboarding disciplines.

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Section: Resultsmentioning

confidence: 91%

Anthropometric, Physiological, and Physical Profile of Elite Snowboarding Athletes

Wang

Zhong

Wang

2022

Strength &Amp; Conditioning Journal

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“…Therefore, the aim of this study was to determine the acute effects of different types of strength exercises including plyometrics in fast (FSSC) and slow (SSSC) stretch-shortening cycle exercises, dynamic (DYN) and isometric (ISOM) strength exercises performed during one session on subsequent balance [center of pressure surface area (CoP SA) and velocity (CoP V)] performance in young weightlifters. With reference to the relevant literature ( Twist et al, 2008 ; Haycraft et al, 2016 ; Pancar et al, 2017 ), we hypothesized that the implementation of plyometric and dynamic strength exercises would lead to acute performance enhancements in measures of balance in youth weightlifters. Given that the performance of plyometrics particularly in FSSC affords high levels of postural control to successfully perform the exercise ( Bobbert et al, 1987 ; Komi et al, 1987 ; Kibele et al, 2014 ; Lauber et al, 2021 ), we speculated that FSSC would elicit the greatest changes in subsequent balance performance in youth athletes.…”

Section: Introductionmentioning

confidence: 99%

Acute Effects of Different Plyometric and Strength Exercises on Balance Performance in Youth Weightlifters

et al. 2021

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Background: High-intensity muscle actions have the potential to temporarily improve the performance which has been denoted as postactivation performance enhancement.Objectives: This study determined the acute effects of different stretch-shortening (fast vs. low) and strength (dynamic vs. isometric) exercises executed during one training session on subsequent balance performance in youth weightlifters.Materials and Methods: Sixteen male and female young weightlifters, aged 11.3±0.6years, performed four strength exercise conditions in randomized order, including dynamic strength (DYN; 3 sets of 3 repetitions of 10 RM) and isometric strength exercises (ISOM; 3 sets of maintaining 3s of 10 RM of back-squat), as well as fast (FSSC; 3 sets of 3 repetitions of 20-cm drop-jumps) and slow (SSSC; 3 sets of 3 hurdle jumps over a 20-cm obstacle) stretch-shortening cycle protocols. Balance performance was tested before and after each of the four exercise conditions in bipedal stance on an unstable surface (i.e., BOSU ball with flat side facing up) using two dependent variables, i.e., center of pressure surface area (CoP SA) and velocity (CoP V).Results: There was a significant effect of time on CoP SA and CoP V [F(1,60)=54.37, d=1.88, p<0.0001; F(1,60)=9.07, d=0.77, p=0.003]. In addition, a statistically significant effect of condition on CoP SA and CoP V [F(3,60)=11.81, d=1.53, p<0.0001; F(3,60)=7.36, d=1.21, p=0.0003] was observed. Statistically significant condition-by-time interactions were found for the balance parameters CoP SA (p<0.003, d=0.54) and CoP V (p<0.002, d=0.70). Specific to contrast analysis, all specified hypotheses were tested and demonstrated that FSSC yielded significantly greater improvements than all other conditions in CoP SA and CoP V [p<0.0001 (d=1.55); p=0.0004 (d=1.19), respectively]. In addition, FSSC yielded significantly greater improvements compared with the two conditions for both balance parameters [p<0.0001 (d=2.03); p<0.0001 (d=1.45)].Conclusion: Fast stretch-shortening cycle exercises appear to be more effective to improve short-term balance performance in young weightlifters. Due to the importance of balance for overall competitive achievement in weightlifting, it is recommended that young weightlifters implement dynamic plyometric exercises in the fast stretch-shortening cycle during the warm-up to improve their balance performance.

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The acute effect of maximal voluntary isometric contraction pull on start gate performance of snowboard and ski cross athletes

Abstract: 19This study investigated whether adding a maximal voluntary isometric contraction

Cited by 2 publications

References 37 publications

Anthropometric, Physiological, and Physical Profile of Elite Snowboarding Athletes

Anthropometric, Physiological, and Physical Profile of Elite Snowboarding Athletes

Acute Effects of Different Plyometric and Strength Exercises on Balance Performance in Youth Weightlifters

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