The effect of countermovement on force production capacity depends on extension velocity: A study of alpine skiers and sprinters
| Autor: | Pierre Samozino, Matt R. Cross, Jean Romain Rivière, Pedro Jiménez-Reyes, Jean-Benoit Morin, Bas Van Hooren, Nicolas Coulmy |
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| Přispěvatelé: | RS: NUTRIM - R3 - Respiratory & Age-related Health, Nutrition and Movement Sciences, RS: NUTRIM - R1 - Obesity, diabetes and cardiovascular health |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Male
medicine.medical_specialty Movement 030209 endocrinology & metabolism Physical Therapy Sports Therapy and Rehabilitation jumping Athletic Performance medicine.disease_cause force-velocity Running 03 medical and health sciences 0302 clinical medicine Jumping Physical medicine and rehabilitation Countermovement Skiing medicine Humans Orthopedics and Sports Medicine Muscle Strength Mathematics 030229 sport sciences Power alpine skiing Exercise Test Alpine skiing neuromuscular Force velocity |
| Zdroj: | Journal of Sports Sciences, 39(16), 1882-1892. Routledge/Taylor & Francis Group |
| ISSN: | 1466-447X 0264-0414 |
| Popis: | In jumping, countermovement increases net propulsive force and improves performance. We aimed to test whether this countermovement effect is velocity specific and examine the degree to which this varies between athletes, sports or performance levels. Force-velocity profiles were compiled in high-level skiers (N= 23) and sprinters (N= 30), with their performance represented in their overall world ranking and season-best 100 m time, respectively. Different ratios between force-velocity variables were computed from squat and countermovement jumps (smaller = less effect): jump height (CRh ), maximum power (CRP ), force (CRF ), and velocity (CRv ). Countermovement effect differed per velocity (inverse relationship between CRF and CRv, r(s) = -0.74, p< .001), and variation force-velocity profiles with countermovement. Skiers exhibited smaller CRF (r(rb) = -0.675, p< .001), sprinters smaller CRv (r(rb) = 0.426, p= .008), and "moderate" velocity conditions did not differentiate groups (CRP or CRh, p> .05). 33% of the variance in skiers' performance level was explained by greater maximum force and a lower CRF (i.e., high explosiveness at low-velocities without countermovement), without an association for sprinters. Countermovement effect appears specific to movement velocity, sport and athlete level. Consequently, we advise sports-specific assessment, and potentially training to reduce the countermovement effect per the relevant velocity. |
| Databáze: | OpenAIRE |
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