preprints_ui: 9x6ha_v1
Data license: ODbL (database) & original licenses (content) · Data source: Open Science Framework
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| 9x6ha_v1 | PROFESSIONAL MARTIAL ARTISTS’ KINEMATIC AND KINETIC CHANGES IN VERTICAL JUMP PERFORMANCE AND BODY COMPOSITION BEFORE AND AFTER COVID-19 LOCKDOWN | The COVID-19 pandemic has caused mandatory lockdowns leading to disruptions in sports training programs. This study aimed to determine the effects of a 16-week COVID-19 lockdown on body composition as well as kinetic and kinematic parameters of the countermovement jump (CMJ) for professional martial artists. Thirteen (n=13) professional martial artists participated in this retrospective cohort study. Subjects were tested on the CMJ at four timepoints: 1) pre-lockdown (pre), 2) immediately post-lockdown (post), 3) two weeks post-lockdown (post+2), and 4) four weeks post-lockdown (post+4). Body composition was measured via bioelectrical impedance and jump data were collected using a force platform sampling at 1,000 Hz. Individual repeated-measures ANOVAs were conducted with pairwise post-hoc analyzes. Differences were observed in vertical jump height (VJH) of 10.33%, peak velocity (PV) of 3.10%, reactive strength index modified (RSImod) of 13.8%, and peak propulsive power (PPP) of 6.00% (p<0.05). There as an increase from post to post+2 of 13.06% in VJ, 4.12% for PV, 14.0% for RSImod, and PPP of 4.66%. There was an increase from post to post+2 of 10.8% in VJH, 3.1% for PV, 14.0% for RSImod, and PPP of 3.0%. Fat mass (FM) and BF% increased from pre to post by 13% and 11%, respectively, and decreased 8% and 11% from post to post+4 respectively (p<0.05). In contrast, there was an decrease in fat-free mass (FFM) from pre to post of 11% and a decrease of 8% from post to post+4. There were moderate associations between FFM and VJH (rmc=0.47), FMM and PPP (rmc=0.47), FFM and PV (rmc=0.47), BF% and PV (rmc=-0.42), and FM and PV (rmc=0.42). While the lockdown resulted in a significant decrease in CMJ performance and increases in BF and FM, subjects’ performance returned to pre-lockdown levels after only 2-4 weeks of post-lockdown training by decreasing BF, FM, and increasing FFM. | 2021-08-18T15:34:38.777592 | 2021-08-29T17:59:42.712210 | 2021-08-24T02:13:02.316402 | sportrxiv | 1 | accepted | 1 | 1 | https://doi.org/10.31236/osf.io/9x6ha | No license | COVID-19; Coronavirus; Detraining; Kung Fu; Vertical Jump; Wushu; repeated measures correlation | ["COVID-19", "Coronavirus", "Detraining", "Kung Fu", "Vertical Jump", "Wushu", "repeated measures correlation"] | Erik Tan; Samuel Montalvo; Matthew P. Gonzalez; Martin Dietze-Hermosa; SEE Min; Sandor Dorgo | [{"id": "bhxf7", "name": "Erik Tan", "index": 0, "orcid": null, "bibliographic": true}, {"id": "qm8d4", "name": "Samuel Montalvo", "index": 1, "orcid": "0000-0003-3104-3428", "bibliographic": true}, {"id": "v3ncz", "name": "Matthew P. Gonzalez", "index": 2, "orcid": null, "bibliographic": true}, {"id": "gyqx6", "name": "Martin Dietze-Hermosa", "index": 3, "orcid": null, "bibliographic": true}, {"id": "8vp4m", "name": "SEE Min", "index": 4, "orcid": null, "bibliographic": true}, {"id": "sjga3", "name": "Sandor Dorgo", "index": 5, "orcid": null, "bibliographic": true}] | Erik Tan | Sport and Exercise Science; Sport and Exercise Biomechanics; Strength and Conditioning; Performance Analysis; Sport and Exercise Physiology | [{"id": "5995e3a754be8104361ac1c3", "text": "Sport and Exercise Science"}, {"id": "5995e3a754be8104361ac1c6", "text": "Sport and Exercise Biomechanics"}, {"id": "5995e3a754be8104361ac1cd", "text": "Strength and Conditioning"}, {"id": "5995e3a754be8104361ac1d5", "text": "Performance Analysis"}, {"id": "5995e3a754be8104361ac1d6", "text": "Sport and Exercise Physiology"}] | https://osf.io/download/611d28922dab24009225b42e | 0 | available | not_applicable | [] | 2025-04-09T20:03:59.135408 |