- 著者
- Christopher Thomas Paul Comfort Chieh-Ying Chiang Paul A. Jones
- 出版者
- Active Aging Research Center
- 雑誌
- Journal of Trainology (ISSN:21865264)
- 巻号頁・発行日
- vol.4, no.1, pp.6-10, 2015-02-16 (Released:2015-03-16)
- 参考文献数
- 39
- 被引用文献数
- 36 78
Objectives: The aim of this investigation was to assess the use of isometric strength testing as a determinant of sprint and change of direction performance in collegiate athletes. Design and Methods: Fourteen male collegiate athletes (mean ± SD; age = 21 ± 2.4 years; height =176 ± 9.0 cm; body mass = 72.8 ± 9.4 kg) participated in the study. Maximal strength was assessed via an isometric mid-thigh pull (IMTP). Isometric mid-thigh pull testing involved trials with peak force (IPF), maximum rate of force development (mRFD), impulse at 100 ms (IP 100) and 300 ms (IP 300) determined. Sprint and COD performance was measured using 5- and 20-m sprint performance, and a modified 505 test. Relationships between variables (IMTP, sprint and COD) were analysed using Pearson’s product – moment correlation. Results: Results suggest that IP 300 displayed the strongest relationships with 5- and 20-m sprint performance (r = −0.51 and −0.54, respectively). The results demonstrate maximum force production measures during IMTP correlate to sprint and COD ability in collegiate athletes. Conclusion: Isometric mid-thigh pull force-time measures are related to athletic performance (acceleration and sprinting), and thus are recommended for use in athlete monitoring and assessment.
- 著者
- Paul Comfort Peter D. Mundy Philip Graham-Smith Paul A. Jones Laura C. Smith Jason P. Lake
- 出版者
- Active Aging Research Center
- 雑誌
- Journal of Trainology (ISSN:21865264)
- 巻号頁・発行日
- vol.5, no.1, pp.1-5, 2016-03-01 (Released:2016-05-20)
- 参考文献数
- 40
- 被引用文献数
- 2 6
Objectives: The aim of this investigation was to compare peak power between the mid-thigh power clean, squat jump and push press. Design and Methods: Eleven recreationally trained men (age 22.2 ± 3.5 yrs; height 178.6 ± 8.5 cm; body mass 88.7 ± 13.5 kg) performed one set of three repetitions of the mid-thigh power clean, squat jump and push press, with 50, 60 and 70% of respective 1RM, while standing on two force platforms. The effect of load and lift on peak power was analyzed with two-way analysis of variance. Results: Peak power was highest during mid-thigh power clean (4739.2 ± 1015.8 W), but was not significantly higher than the squat jump (4430.4 ± 1140.3 W, Cohen’s d = 0.29) and push press (4071.1 ± 1552.3 W, Cohen’s d = 0.51) performed at equiva lent intensities. Similarly, the load effect on peak power was non-significant and trivial (Cohen’s d < 0.35). Conclusions: The findings of this study show that when training to maximize peak power output the mid-thigh power clean, squat jump and push press performed at 50-70% of 1RM could be incorporated interchangeably without any detriment to peak power output.
- 著者
- Thomas Dos’Santos Christopher Thomas Paul A. Jones Paul Comfort
- 出版者
- Active Aging Research Center
- 雑誌
- Journal of Trainology (ISSN:21865264)
- 巻号頁・発行日
- vol.6, no.2, pp.35-41, 2017-06-17 (Released:2017-08-19)
- 参考文献数
- 35
- 被引用文献数
- 1 60
Objectives: To determine the impact of between limb asymmetries in hop performance on change of direction speed (CODS). Design and Methods: Twenty-two multisport collegiate athletes (mean ± SD; age: 21.8 ± 3.4 years, height: 178.1 ± 6.7 cm, mass: 73.5 ± 7.1kg) performed three single and triple horizontal hops for distance per limb, followed by three modified 505 and 90˚cut CODS trials each side to establish imbalances between right and left, and dominant (D) and non-dominant (ND) limbs. Limb dominance was defined as the limb that produced the furthest hop or faster CODS performance. Results: Paired sample t-tests revealed no significant differences in hop performance and CODS performance between right and left limbs (p > 0.05, g ≤ 0.11), however, significant differences were observed when comparing D and ND limbs (p < 0.001, g = 0.46-0.61). No significant correlations were observed between hop imbalance and CODS performance (p > 0.05, r ≤ 0.35). Low agreements (32-55%) were demonstrated between like for like identifications of asymmetry for CODS and hop performance. Conclusions: Imbalances in hop and CODS were present; however, greater hop imbalances were not detrimental to CODS. Furthermore, the D limb for hopping did not necessarily correspond to faster performance from that limb during 180˚ turns and 90˚ cuts (plant foot). Collegiate male multi-sport athletes with imbalances within the range reported within this study (≤ 15%) should not experience associated CODS detriments.