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  • Author or Editor: M Váczi x
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In this study, we tested the hypothesis that, during the regular in-seasonal basketball training, an additional 7-week plyometric training program improves lower extremity strength, balance, agility, and jump performance in adolescent female basketball players. Eighteen female basketball players less than 17 years of age were randomly assigned into an experimental group (plyometric training) and a control group. Both groups underwent the same basketball training program. Pre- and post-training test periods included quadriceps and hamstring strength, balance, jump performance, and agility measurements. Illinois agility test time (p = 0.000) and quadriceps strength (p = 0.035) increased uniformly in the two groups. Significant group by test period interaction was found for countermovement jump (p = 0.007), and countermovement height reduced significantly in the plyometric training group (p = 0.012), while it remained unchanged in controls. No significant change was found for T agility test, balance, hamstring strength or H:Q ratio. This study shows that the training program used in-season did not improve the measured variables, except for knee extensor strength. It is possible that regular basketball trainings and games combined with high-volume plyometric training did not show positive functional effects because of the fatigue caused by incomplete recovery between sessions.

Open access
Authors: M Vaczi, E Tekus, T Atlasz, A Cselko, G Pinter, D Balatincz, M Kaj and M Wilhelm

In this study, we tested the hypotheses that, relative to the maximum capacities, ballroom dancing is more intensive for females than males, and that the hold technique (female vs. male) regulates dancing intensity. Ten dance couples were tested in a maximal treadmill test, competition simulation, and stationary dance hold position. Peak heart rate and relative oxygen consumption were measured during the tests, except that oxygen consumption was not measured during competition simulation. Regardless of gender, heart rate increased similarly in the treadmill test and in the competition simulation. In the treadmill test, females achieved an oxygen consumption of 78% of the males (p < 0.05). Compared with males, females achieved 14% higher heart rate (p < 0.05) and similar oxygen consumption during the hold position. Heart rate during competition simulation relative to maximum was greater for females than males. Both heart rate and oxygen consumption measured during the hold, relative to maximum, were greater for females than males. It is concluded that lower class ballroom dancers perform at their vita maxima during competition simulation. Using heart rate as an intensity indicator, ballroom dancing is more intensive for females because of their unique hold technique.

Open access
Authors: K Galamb, B Szilágyi, OM Magyar, T Hortobágyi, R Nagatomi, M Váczi and J Négyesi

Aims

Right- and left-side-dominant individuals reveal target-matching asymmetries between joints of the dominant and non-dominant upper limbs. However, it is unclear if such asymmetries are also present in lower limb’s joints. We hypothesized that right-side-dominant participants perform knee joint target-matching tasks more accurately with their non-dominant leg compared to left-side-dominant participants.

Methods

Participants performed position sense tasks using each leg by moving each limb separately and passively on an isokinetic dynamometer.

Results

Side-dominance affected (p < 0.05) knee joint absolute position errors only in the non-dominant leg but not in the dominant leg: right-side-dominant participants produced less absolute position errors (2.82° ± 0.72°) with the non-dominant leg compared to left-side-dominant young participants (3.54° ± 0.33°).

Conclusions

In conclusion, right-side-dominant participants tend to perform a target-matching task more accurately with the non-dominant leg compared to left-side-dominant participants. Our results extend the literature by showing that right-hemisphere specialization under proprioceptive target-matching tasks may be not evident at the lower limb joints.

Restricted access
Authors: Márk Váczi, É. Tékus, M. Kaj, T. Kőszegi, M. Ambrus, J. Tollár, T. Atlasz, K. Szabadfi and I. Karsai

We hypothesized that stair-jump exercise would induce less muscle damage and greater acute metabolic responses than level-jumps.

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