Cardio-respiratory and neuromuscular responses to motocross race
Tomi Konttinen. 2005. Cardio-respiratory and neuromuscular responses to motocrossrace. Department of Biology of Physical Activity. University of Jyväskylä. 37p.Objectives - The primary aim of the present study was to examine physiological andneuromuscular responses during motocross racing. Furthermore, maximal isometricforce levels of the upper and lower body were studied.Methods - Seven Finnish A-level (group A) and five hobby-class (group H)motocross-riders performed a 30 minute riding test at a motocross track and muscleforce and maximal oxygen uptake (VO2max) tests in a laboratory. Variablesdescribing cardio-respiratory strain were measured continuously during the riding andin the VO2max tests. Muscle activity using surface EMG recording was recordedduring the riding test and during the maximal isometric contractions.Results – During the race the mean VO2 reduced significantly in group A from 86 ± 10% to 69 ± 6 % of the maximum. In group H the reduction occurred from 94 ± 25 % to82 ± 20 %. The relative VO2 between the maximum and the riding test correlatedsignificantly with riding speed (r = 0.70, p < 0.01). Heart rate (HR) was maintainedcontinuously at the level of 97 ± 7 % of its maximum in group A and at 98 ± 3 % ingroup H. During the ride, the mean blood lactate concentration was 4.0 ± 1.0 mmol·l-1in group A but in group H it reduced from 5.7 ± 1.0 mmol·l-1 to 4.6 ± 0.7 mmol·l-1.Mean muscle activation of the lower body during riding varied between 24 – 38 % ofits maximum in group A and between 40 – 45 % in group H. The activation of theupper body muscles varied between 62 – 116 % in group A and 68 – 178 % in groupH of its maximum. The post-riding force measurements showed more significant(p<0,05) reductions in maximal voluntary contraction (MVC) of group H than MVCof group A. The absolute MVC measured before and after the riding experimentshowed greatest reductions in hand grip forces.Conclusions – Motocross causes great physical stress demanding on both skill andphysical capacity of the rider. Physical stress occurs due to handling of the bike whilereceiving continuous impacts, while muscle actions are both dynamic and isometricplacing demands in both aerobic and anaerobic metabolism. The data suggests thatboth the maximal capacity and the strain during the ride should be measured toanalyze the true physiological demands of motocross ride including the recording offorce levels before and after the ride to evaluate the neuromuscular fatigue due to therace.
...
Metadata
Näytä kaikki kuvailutiedotKokoelmat
- Pro gradu -tutkielmat [29149]
Samankaltainen aineisto
Näytetään aineistoja, joilla on samankaltainen nimeke tai asiasanat.
-
Acute Neuromuscular and Hormonal Responses to Power, Strength, and Hypertrophic Protocols and Training Background
Kotikangas, Johanna; Walker, Simon; Toivonen, Sara; Peltonen, Heikki; Häkkinen, Keijo (Frontiers Media SA, 2022)This study investigated how two slightly different athlete groups would differ in acute neuromuscular and endocrine responses to specific resistance exercise loadings and recovery compared to untrained participants. Power ... -
Acute neuromuscular, cardiorespiratory and endocrine responses and chronic adaptations to combined strength and endurance training in recreationally endurance trained men and women
Taipale, Ritva (University of Jyväskylä, 2013) -
Different-day and same-session combined strength and endurance training : adaptations in neuromuscular and cardiorespiratory performance, body composition, metabolic health and wellbeing in men and women
Eklund, Daniela (University of Jyväskylä, 2017)This thesis investigated 1) acute neuromuscular and hormonal responses to combined strength and endurance loadings with different orders and their long-term adaptations (women), 2) adaptations in neuromuscular, hormonal, ... -
Effects of combined different day endurance and strength training on cardiorespiratory and neuromuscular performance in untrained men and women
Vidal, Felix (2014)Concurrent endurance (E) and strength has caught the attention of many researchers due to both leads to different adaptations, either cardiorespiratory or neuromuscular. It is well known that combined strength and endurance ... -
Acute neuromuscular and hormonal responses and long-term adaptations to hypertrophic resistance training : with special reference to constant versus variable resistance
Walker, Simon (University of Jyväskylä, 2012)
Ellei toisin mainittu, julkisesti saatavilla olevia JYX-metatietoja (poislukien tiivistelmät) saa vapaasti uudelleenkäyttää CC0-lisenssillä.