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1

NADH-dependant diaphorase activity in single mitochondria of the sperm midpiece-gene mapping study

100%
Golas A., Tomasik G.
Acta Biologica Cracoviensia. Series Botanica. Supplement
|
2010
|
tom 52
|
nr 1
2

Endosymbiotic microorganisms of the primitive aphid Sacchiphantes viridis (Insecta, Hemiptera, Adelgoidea: Adelgidae)

81%
Machalik A., Szklarzewicz T., Wieczorek K., Golas A.
Acta Biologica Cracoviensia. Series Botanica. Supplement
|
2012
|
tom 54
|
nr 1
3

Analysis of NADH-dependent dehydrogenases activity in mouse sperm mitochondria

81%
Golas A., Malek P., Styrna J.
Acta Biologica Cracoviensia. Series Botanica. Supplement
|
2006
|
tom 48
|
nr 1
20
4

Correlation of centromeric heterochromatin C-band polymorphism with breeding failure in mice

81%
Marciniak M., Lenartowicz M., Golas A., Styrna J.
Folia Biologica
|
2010
|
tom 58
|
nr 3-4
251-255
5

Analysis of oocyte quality in recombinant inbred mouse strains developed from KE and CBA strains that differ in fertilization efficiency

80%
Wabik-Sliz B., Golas A., Krzanowska H.
Journal of Applied Genetics
|
2005
|
tom 46
|
nr 2
Recombinant inbred (RI) mouse strains were developed from reciprocal crosses between two inbred strains differing in the proportion of fertilized ova (CBA, 100%; KE, 77%), to analyse the underlying factors. A correlation (r = 0.83, P< 0.01) between fertilization efficiency within 22 RI strains and after mating RI females with KE males proved that oocyte quality was involved. The following oocyte parameters were analysed in RI and progenitor strains: time of meiotic maturation, rapidity of enzymatic removal of egg investments, and proportion of fertilized ova with supplementary spermatozoa in the perivitelline space. Among the RI strains, high incidence of supplementary spermatozoa was correlated with lower efficiency of fertilization (r = -0.58, P < 0.05) and with slow meiotic maturation (r=-64, P < 0.01), suggesting that delayed maturation may affect oocyte ability of being fertilized by the first penetrating spermatozoon. However, significant correlations were also found between characters which coexist within the progenitor strains, but are not likely to be physiologically related; this suggests that RI strains have inherited large blocks of progenitor genomes, not disrupted by recombination. The strain distribution pattern (SDP) of the analysed traits revealed CBA-like, KE-like, and intermediate phenotypes, indicating that they are polygenically determined. No linkages were found between the studied traits and 12 enzymatic markers. However, the SDP for fertilization efficiency showed a preponderance of non-matching strains (15/19) in relation to agouti locus; the known instability of this chromosome region makes it possible that a putative linkage was disrupted by recombination when RI strains were created.
6

Chromosome 7q11 controls sperm beat cross frequency [BCF] in mice

80%
Golas A., Grzmil P., Muller C., Styrna J.
Folia Biologica
|
2004
|
tom 52
|
nr 3-4
7

Changes in EMG activity of the prime movers during 10 sets of the flat bench press performed to concentric failure

71%
Stronska K., Trebert M., Golas A., Maszczyk A., Zajac A.
Baltic Journal of Health and Physical Activity. The Journal of Gdansk University of Physical Education and Sport
|
2018
|
tom 10
|
nr 1
Background: The bench press (BP) is a complex exercise of the upper body in which great external loads can be lifted, requiring high neuromuscular activity. Electromyography (EMG) is the study of muscle function through the inquiry of the electrical signal the muscles emanate. Material/Methods: The aim of the present study was to analyze changes in the EMG activity of the prime movers during 10 sets of the flat bench press. 10 male athletes representing different sport disciplines, experienced in resistance training took part in the study. Results: In the first set all of the tested muscles increased their tension from the first 3 repetitions to the last 3 repetitions. The tension of these muscles increased in successive repetitions and reached significantly greater values in the last repetitions of the set. In the 10th final set of the BP exercise protocol the athletes performed only 8-9 repetitions and the activity of all studied muscles decreased significantly from the first 3 to the last 3 repetitions of the set. Conclusions: It seems that peripheral fatigue limits the number of repetitions in the first set of the BP, while central fatigue accumulates with each set, causing a very significant drop in the EMG activity and the load lifted in the 10th, last set of the exercise protocol.
8

Organisation of the egg capsule of Macrobiotus pallari and Richtersius coronifer (Tardigrada, Eutardigrada, Parachela)

71%
Golas A., Czernekova M., Hyra M., Janelt K., Poprawa I.
Acta Biologica Cracoviensia. Series Botanica. Supplement
|
2016
|
tom 58
|
nr 1
9

Changes of internal structure of movement in speed skating

61%
Golas A., Krzysztofik M., Drozd M., Roczniok R., Trebert M., Zajac T., Maszczyk A.
Trends in Sport Sciences
|
2017
|
tom 24
|
nr 1
Speed skating is a competitive form of ice skating in which the athletes race each other at distances from 500 to 10000 m. In speed skating the main components of specific fitness include acceleration, anaerobic sprint ability and explosive power of the lower extremities. A specific starting pattern in speed skating affects the relationships between strength of individual muscle groups. The main aim of this study was to analyse the pattern of internal structure of specific speed skating movements depending on their velocity – % PSE. The study examined six female athletes from the Polish National Speed Skating Team. The results of muscle activity index (4/7 and 4/10 PES mean) revealed statistically significant differences for the GM (Z=2.36; p=0.017), A (Z=2.02; p=0.04) and BF (Z=2.20; p=0.027) muscles respectively. The same analysis was performed for differences between peak activities at intensities of 4/7 PES and 4/10 PES. The results revealed statistically significant differences for the TFL (Z=2.52; p=0.011) and A (Z=2.20; p=0.027) and BF (Z=2.36; p=0.017) muscles. The results obtained in this study show that the more effective use of Gluteus Medius (GM), Adductor (A), Biceps Femoris (BF) and Tensor Fasciae Latae (TFL) muscles substantially improves starting speed in speedskating.
10
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Content available

Changes in bar velocity and muscular activity during the bench press in relation to the load lifted

61%
Golas A., Maszczyk A., Wilk M., Statsny P., Petr M., Wrobel G.
Central European Journal of Sport Sciences and Medicine
|
2015
|
tom 11
|
nr 3
11

The differences in shoulder muscle activity between injured and uninjured rugby players during player- and bag-tackling

61%
Stastny P., Bacakova R., Chytilova M., Tufano J., Golas A., Masczyk A.
Trends in Sport Sciences
|
2016
|
tom 23
|
nr 4
Introduction. Rugby is a physically demanding game involving multiple body contacts and collisions accompanied by a large number of shoulder injuries, 51% of which occur during tackling. Aim of Study. The aim of this cross-sectional study was to compare shoulder girdle muscle activation between injured (IN) and uninjured (UN) rugby players during bag-tackling and player-tackling. Fourteen rugby players were divided into the injured (IN) (n = 8) and uninjured (UN) (n = 6) groups. The players performed five maximal effort tackles against a tackling bag and against a fellow player. Material and Methods. The tackle momentum, time of impact, and peak surface electromyography amplitude expressed as maximum voluntary isometric contraction (MVIC) were measured on eight muscles: the latissimus dorsi, lower trapezius, pectoralis major, anterior deltoid, serratus anterior, posterior deltoid, middle trapezius, and upper trapezius. Results. The ANOVA revealed significant differences between the IN and UN groups in terms of tackling, with the pectoralis major showing a greater peak in IN (181 ± 18% MVIC) compared to UN (141 ± 43% MVIC), the lower trapezius showed showing a greater peak in IN (127 ± 46% MVIC) compared to UN (54 ± 25% MVIC), and the serratus anterior – a greater peak in IN (157 ± 35% MVIC) compared to UN (87 ± 55% MVIC). Conclusions. Injured players display higher excitation levels in the serratus anterior, pectoralis major, and lower trapezius, which support the communal function of the muscles surrounding the shoulder joint during tackling. Testing and treatment of these muscles is recommended for injured rugby players.
12

Semen quality parameters and embryo lethality in mice deficient for Trp53 protein

61%
Golas A., Lech T., Janula M., Bederska D., Lenartowicz M., Styrna J.
Reproductive Biology
|
2011
|
tom 11
|
nr 3
13

Changes in the internal movement structure during the push and paddle phases in Olympic national team lugers

61%
Golas A., Drozd M., Krzysztofik M., Stronska K., Bojacz P., Zak M., Pajerska K.
Trends in Sport Sciences
|
2016
|
tom 23
|
nr 2
Introduction. Luge is a winter Olympic sport. The level of performance in luge depends on the cumulative time of runs (typically two) performed on the track. The fastest times of the best male lugers on the Königssee luge track in Germany are around 49 seconds, with the speeds reaching 140 km per hour. Aim of Study. The aim of the present study was to examine the pattern of internal movement structure of the push and paddle phases of the luge start in a group of Polish national elite lugers, with regard to the speed at which these motor tasks are performed. Material and Methods. The study examined the performance of six male members of the Polish National Luge Team. The study participants were randomized. The study was carried out on the Königssee luge track in Germany. The lugers’ motor activity was measured in six muscles: anterior deltoid (AD), biceps brachii (BB), triceps brachii (TB), latisimuss dorsi (LD), flexor carpi ulnaris (FCU), and trapezius (T). Results. The repeated measures ANOVA for peak muscle activity between two speeds of the push phase revealed statistically significant intragroup differences for the TB (F = 21.232; p = 0.001) and LD (F = 23.412; p = 0.001) muscles. The paddle phase revealed statistically significant intragroup differences for the LD (F = 34.121; p = 0.001), T (F = 22.111; p = 0.001) and TB (F = 19.211; p = 0.001). Conclusions. The results of the study show that a more effective use of the latisimuss dorsi, triceps brachii and trapezius muscles substantially improves the speed of the luge start.
14

Changes in EMG activity of the prime movers during 10 sets of the flat bench press performed to concentric failure

51%
Stronska K., Trebert M., Golas A., Maszczyk A., Pieta A., Tyrala F., Tyrala F., Fischerova P., Zajac A.
Baltic Journal of Health and Physical Activity. The Journal of Gdansk University of Physical Education and Sport
|
2018
|
tom 10
|
nr 3
Background: ‪The bench press (BP) is a complex exercise of the upper body in which great external loads requiring high neuromuscular activity can be lifted. Electromyography (EMG) is a study of the muscle function through the inquiry of the electrical signal the muscles emanate. The aim of the present study was to analyse changes in EMG activity of the prime movers during 10 sets of the flat bench press. Material and methods: ‪Ten male athletes representing different sport disciplines, experienced in resistance training took part in the study. Results: ‪In the first set, all of the tested muscles increased their tension from the first 3 repetitions to the last 3 repetitions. The tension of these muscles increased in successive repetitions and reached significantly greater values in the last repetitions of the set. In the 10th final set of the BP exercise protocol the athletes performed only 8-9 repetitions, and the activity of all studied muscles decreased significantly from the first 3 to the last 3 repetitions of the set. Conclusions: ‪It seems that peripheral fatigue limits the number of repetitions in the first set of the BP, while central fatigue accumulates with each set, causing a very significant drop in EMG activity and the load lifted in the 10th, last set of the exercise protocol.
15
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Content available

Endocrine responses to physical training and tribulus terrestris supplememtation in middle-age men

51%
Wilk M., Michalczyk M., Chycki J., Maszczyk A., Czuba M., Roczniok R., Golas A., Zajac A.
Central European Journal of Sport Sciences and Medicine
|
2016
|
tom 13
|
nr 1
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