Abstract
Background and objectiveUnaccustomed eccentric or eccentric–concentric exercise leaves us stiff and sore the next day and can cause muscle damage. The data about the residual effect of prior eccentric–concentric exercises on oxygen uptake (VO2) during constant cycling exercise in women or the data about differences of such effect between genders are scarce. Therefore, the aim of this study was to assess differences of the residual effect of PDJ on VO2 during HCE and indirect muscle damage parameters between women and men. Materials and methodsThe study aimed to asses differences of the residual effect of prior drop jumps (PDJ) on VO2 during heavy cycling exercise (HCE) and indirect muscle damage parameters between men (n=8) and women (n=11). On four different days participants performed one incremental cycling exercise and three HCE (control [CON], 45min [45′ PDJ] and 24h [24h PDJ] after 100 drop jumps). The intensity of HCE was set to work rate corresponding to 50% of the difference between the second and the first ventilatory thresholds which were determined analyzing pulmonary gas exchange parameters during incremental cycling exercise. Capillary blood samples were collected in order to measure blood lactate concentration immediately after HCE and serum creatine kinase (CK) activity 24h after PDJ. Subjects rated perceived exertion and delayed onset muscle soreness (DOMS) using 20 and 10 point scales, respectively. ResultsVO2 at 3–6min of HCE performed 45′ after PDJ was significantly increased as compared to CON HCE only in the male group. Both men and women felt moderate muscle pain. CK activity was significantly increased 24h after PDJ in the male group. Both during HCE 45′ PDJ and 24h PDJ, the significant positive correlation was observed between relative changes of VO2 during steady state of HCE and CK activity only in the male group. ConclusionsPrior eccentric–concentric exercise of thigh muscles (100 drop jumps) accelerates VO2 kinetics at the start and increases VO2 during steady state of heavy cycling only in the male group. So, prior exercise of such type has a higher negative impact on cycling economy in men than in women and this might be related to greater muscle damage and fatigue in physically active male persons after plyometric exercise.
Highlights
It is well established that unaccustomed eccentric or eccentric– concentric exercise leaves us stiff and sore the day and can cause muscle damage
Muscle damage is characterized by delayed onset muscle soreness (DOMS), muscle fiber disarrangement and inflammatory cell infiltration, increased serum creatine kinase (CK) activity, decreased muscle force production, and decreased concentric contraction performance efficiency [1,2]
The original finding of this investigation was the different influence of prior drop jumps (PDJ) on VO2 response during heavy cycling between men and women. 45 min after PDJ the significant increase in VO2 during steady state of heavy cycling exercise (HCE) was observed only in men and the relative magnitude of VO2 changes was positively correlated with blood CK activity 24 h after PDJ in the male group
Summary
It is well established that unaccustomed eccentric or eccentric– concentric exercise leaves us stiff and sore the day and can cause muscle damage. The CK activity and DOMS rating have been found both similar [4] or higher in women [5] or in men [6] during different periods after eccentric– concentric exercise. Materials and methods: The study aimed to asses differences of the residual effect of prior drop jumps (PDJ) on VO2 during heavy cycling exercise (HCE) and indirect muscle damage parameters between men (n = 8) and women (n = 11). Results: VO2 at 3–6 min of HCE performed 450 after PDJ was significantly increased as compared to CON HCE only in the male group Both men and women felt moderate muscle pain. Conclusions: Prior eccentric–concentric exercise of thigh muscles (100 drop jumps) accelerates VO2 kinetics at the start and increases VO2 during steady state of heavy cycling only in medicina 53 (2017) 331–338 the male group. Prior exercise of such type has a higher negative impact on cycling economy in men than in women and this might be related to greater muscle damage and fatigue in physically active male persons after plyometric exercise
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
