Development of Race Profiles for the Performance of a Simulated 2000-m Rowing Race

2003 ◽  
Vol 28 (4) ◽  
pp. 536-546 ◽  
Author(s):  
Michael D. Kennedy ◽  
Gordon J. Bell
Keyword(s):  
Critical Power ◽  
Elite Athletes ◽  
Maximal Oxygen Consumption ◽  
Oxygen Deficit ◽  
Male And Female ◽  
Pacing Strategy ◽  
Accumulated Oxygen Deficit ◽  
Before And After ◽  
The Mean ◽  
And Gender

The purpose of this study was to determine the race profile for a 2000-m simulated rowing race as well as the effect of training and gender on the race profile. Nineteen men and 19 women undertook a 2000-m simulated rowing race before and after 10 weeks of a typical off-season training program for rowing. Velocity was calculated every 200 m and the deviation in velocities from the mean race velocity (MRV) was plotted every 200 m to produce race profiles for each gender before and after training. The three fastest male rowers varied approximately 0.02 m•s−1 from the MRV after training and displayed a constant-pace model. The fastest female rowers displayed an all-out strategy after training, producing large deviations from MRV. Average squared deviations from the mean (SDM) determined that all groups except the fastest females had a reduction in MRV deviation after training. These results suggest that the optimal race profile for a simulated 2000-m rowing race may be different between genders. Training reduces SDM and influences both male and female pacing patterns such that both exhibit a pacing strategy that is more similar to that of elite athletes in other events of similar and shorter duration. Key words: maximal oxygen consumption, critical power, pacing strategy, critical velocity, accumulated oxygen deficit

scholarly journals Energy System Contribution during 1500M Running in Untrained and Endurance-Trained Asian Male College Students

2021 ◽  
Vol 23 (2) ◽  
pp. 9-18
Author(s):  
Govindasamy Balasekaran ◽  
Loh Mun Keong ◽  
Viknesh Veeramuthu ◽  
Yong Tze Woon ◽  
Visvasuresh Victor Govindaswamy ◽  
...  
Keyword(s):  
Body Fat ◽  
Maximal Oxygen Consumption ◽  
Energy System ◽  
Oxygen Deficit ◽  
Accumulated Oxygen Deficit ◽  
Anaerobic Energy ◽  
The Mean ◽  
The Times ◽  
Study Participants ◽  
Aerobic And Anaerobic

OBJECTIVES To compare the aerobic and anaerobic energy system contribution during 1500m running between collegiate untrained (UT) and endurance trained (ET) subjects.METHODS Five Asian UT (age: 23.8 ± 0.4 yrs, body fat %: 15.9 ± 5.7 %, height: 174.0 ± 4.1 cm, weight: 65.5 ± 4.1 kg) and 5 Asian ET male participants (age: 24.4 ± 3.9 yrs, body fat %: 12.9 ± 6.9 %, height: 169.4 ± 5.1 cm, weight: 60.6 ± 8.1 kg) participated in this study. Participants attended 3 sessions to determine their body composition, submaximal and maximal oxygen consumption (VO<sub>2max</sub>) test, 1500m track running session (RS) and 1500m treadmill RS. The maximally accumulated oxygen deficit (MAOD) method was used to calculate energy system contribution.RESULTS The times for the 1500m track run for the UT and ET were 428.0 ± 48.7 and 331.6 ± 14.0 seconds (p=0.004) respectively. There were no significant differences in VO<sub>2</sub> between the 1500m track and treadmill RS indicating the participants ran to their personal best times for both trials. The mean VO<sub>2max</sub>(mL•kg<sup>-1</sup>•min<sup>-1</sup>) were significantly different between UT (45.1 ± 5.0) and ET participants (58.3 ± 2.2) (p=0.002). The mean relative contributions of the aerobic and anaerobic energy system during 1500m running were significantly different for the UT, 65.4 ± 7.0%, 34.6 ± 7.0 and ET, 75.7 ± 1.5%, 24.3 ± 1.5 % (p =0.011).CONCLUSIONS The point of equal contribution of the aerobic and the anaerobic systems occurred after thirty to forty seconds of intensive exhaustive running after which the aerobic contribution continues to increase while the anaerobic contribution decreases with increasing duration. By the end of 60th second of exhaustive running, the ET mean aerobic contribution is 71.5% compared to the UT’s 58.6%. This finding suggests a greater reliance on the aerobic energy system by the ET.

Thomas Aquinas on Sexual Difference: The Metaphysical Biology and Moral Significance of Human Sexuality

Pro Ecclesia ◽  
2021 ◽  
Vol 30 (2) ◽  
pp. 177-215
Author(s):  
Paul Gondreau
Keyword(s):  
Sexual Difference ◽  
Human Sexuality ◽  
Thomas Aquinas ◽  
Moral Significance ◽  
Male And Female ◽  
Biological Design ◽  
Moral Excellence ◽  
Structural Differences ◽  
The Mean ◽  
And Gender

Thomas Aquinas offers for his time a novel take on human sexual difference, in that he grounds human sexuality in what we might term a metaphysical biology and accords it a privileged role in the moral life. Though his biology is drawn from Aristotle, which leads Aquinas to make problematic statements on sexual difference, he nonetheless offers a perspective that remains deeply relevant and significant for today. His method or approach of tethering sexual difference first and foremost to our animal-like biological design remains perennial, particularly at a time when many seek to dismiss biology as irrelevant to sexual identity and gender difference. The latest findings of the emerging field of neurobiology, which have uncovered structural differences between the male and female brains, offer key support to Aquinas’s approach. Even more important, he holds, in an unprecedented move, that sexual design and inclination provide a veritable source of moral excellence. He goes so far as to locate the mean of virtue in our sexual design and appetites.

scholarly journals P277 RV remodeling by echo parameters in endurance and strength sport training

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
M Moshkani Farahani ◽  
M Shirdel
Keyword(s):  
Endurance Exercise ◽  
Performance Status ◽  
Exercise Group ◽  
Strength Group ◽  
Sport Training ◽  
Significant Difference ◽  
Before And After ◽  
The Mean ◽  
And Gender ◽  
And Function

Abstract Introduction With regular and long-term exercises, the heart undergoes changes that are called the adaptation of the heart in response to exercise or physiological changes, which contrasts with the pathological changes caused by hypertension and aortic valve stenosis. However, the exact effects of exercise on the structure and function of the heart depend on the type, intensity and duration of exercise, the amount of physical fitness, inheritance, and gender. Materials and Methods In this prospective clinical trial study, 40 subjects, including 20 in the endurance exercise group and 20 in the exercise group, were evaluated. Echocardiography was performed for all of these subjects before and after the exercises that was performed professionally for 8 weeks under the supervision of the trainer and the changes were recorded. The data were analyzed statistically by SPSS20 software. A significant level of 0.05 was considered. Results The mean ± standard deviation of the age was 20/80 ± 1/42 years. Significant decrease in mean RVSM was observed only in the strength group (P = 0.008). There was no significant difference in the endurance group . There was no significant difference between the two groups before the test in the mean TAPSE (P = 0.46). The mean of TAPSE in the endurance group was 0.22 ± 1.99 and in the strength group was 0.31 ± 1.95. There was no significant difference between the two groups (P 0.46). There was no significant difference between the two groups before the test in the mean E / e (P = 0.51). The mean E / e "in the endurance group was 0.47 ± 4.75 and in the strength group was 0.54 ± 5.50, and there was a significant difference between the two groups (P &lt;0.001). The mean SWDT in the endurance group was 0.12 ± 0.95 and in the strength group was 0.11 ± 1.06, and there was a significant difference between the two groups (P = 0.002). There was a significant increase in mean SWDT in the strength group after the test (P &lt;0.001) .There was a significant increase in mean PAP in the strength group (P = 0.007) . There was a significant increase in mean LV mass index in the strength group (P &lt;0.001),with no significant difference between the two groups in mean FAC. Conclusion It seems that any kind of strength and endurance exercise affects the performance status, however, strength exercises have more effects which causes RV dysfunction. All indexes measured changed within normal level except for PAP that had abnormal changes after endurance exercise .

Effect of Two Different Weight-Loss Rates on Body Composition and Strength and Power-Related Performance in Elite Athletes

2011 ◽  
Vol 21 (2) ◽  
pp. 97-104 ◽  
Author(s):  
Ina Garthe ◽  
Truls Raastad ◽  
Per Egil Refsnes ◽  
Anu Koivisto ◽  
Jorunn Sundgot-Borgen
Keyword(s):  
Weight Loss ◽  
Body Composition ◽  
Body Weight ◽  
Elite Athletes ◽  
Countermovement Jump ◽  
Repetition Maximum ◽  
Before And After ◽  
The Mean ◽  
And Performance ◽  
Better Than

When weight loss (WL) is necessary, athletes are advised to accomplish it gradually, at a rate of 0.5–1 kg/wk. However, it is possible that losing 0.5 kg/wk is better than 1 kg/wk in terms of preserving lean body mass (LBM) and performance. The aim of this study was to compare changes in body composition, strength, and power during a weekly body-weight (BW) loss of 0.7% slow reduction (SR) vs. 1.4% fast reduction (FR). We hypothesized that the faster WL regimen would result in more detrimental effects on both LBM and strength-related performance. Twenty-four athletes were randomized to SR (n = 13, 24 ± 3 yr, 71.9 ± 12.7 kg) or FR (n = 11, 22 ± 5 yr, 74.8 ± 11.7 kg). They followed energy-restricted diets promoting the predetermined weekly WL. All athletes included 4 resistance-training sessions/wk in their usual training regimen. The mean times spent in intervention for SR and FR were 8.5 ± 2.2 and 5.3 ± 0.9 wk, respectively (p < .001). BW, body composition (DEXA), 1-repetition-maximum (1RM) tests, 40-m sprint, and countermovement jump were measured before and after intervention. Energy intake was reduced by 19% ± 2% and 30% ± 4% in SR and FR, respectively (p = .003). BW and fat mass decreased in both SR and FR by 5.6% ± 0.8% and 5.5% ± 0.7% (0.7% ± 0.8% vs. 1.0% ± 0.4%/wk) and 31% ± 3% and 21 ± 4%, respectively. LBM increased in SR by 2.1% ± 0.4% (p < .001), whereas it was unchanged in FR (–0.2% ± 0.7%), with significant differences between groups (p < .01). In conclusion, data from this study suggest that athletes who want to gain LBM and increase 1RM strength during a WL period combined with strength training should aim for a weekly BW loss of 0.7%.

scholarly journals ORAL HEALTH;

2017 ◽  
Vol 24 (12) ◽  
pp. 1894-1898
Author(s):  
Shahid Ali Mirani ◽  
Syed Yousif Ali Shah ◽  
Muhammad Ameen Sahito
Keyword(s):  
Oral Health ◽  
Dental Caries ◽  
Cross Sectional Study ◽  
Female Students ◽  
Sectional Study ◽  
Cross Sectional ◽  
Male And Female ◽  
The Mean ◽  
And Gender ◽  
Study Setting

Objectives: This study was carried out to evaluate the dental students’perception about condition of their gums and teeth and prevalence of dental caries. StudyDesign: Descriptive cross sectional study. Setting: Liaquat University of Medical and HealthSciences. Period: July 2011 to December 2011. Material and Method: The sample size was200 students comprising of both male and female. Clinical Oral examination was performedwith the help of mouth mirror and explorer in dental chair. The perception of dental studentsabout condition of their gums and teeth was obtained through questionnaire. Results: Theresults revealed that 25 % of students in present study had dental decay. The mean DMFT scorewas 0.625. Moreover, the mean DMFT score for male and female students was 0.658 and 0.576respectively. The results about distribution of DMFT components indicated that the decayed(D) teeth were in greatest number followed by filled (F) and missed (M) teeth. Conclusion:There was statistically no significant association between dental caries and gender. Moreover,prevalence of dental caries was significantly different between those who perceived their gumsand teeth condition excellent and good compared to the students who perceived their gumsand teeth condition as poor.

scholarly journals Comparing the hand grip power and creatine kinase levels of U-17 judo national team athletes before and after a 6-week strength training

2020 ◽  
Vol 24 (4) ◽  
pp. 163-168 ◽  
Author(s):  
Mehmet Soyal ◽  
Nuri M. Çelik
Keyword(s):  
Creatine Kinase ◽  
Strength Training ◽  
Female Athletes ◽  
Female Participant ◽  
Male And Female ◽  
National Team ◽  
Hand Grip ◽  
Before And After ◽  
The Mean ◽  
Grip Power

Background and Study Aim. The aim of this study is to compare the hand grip power and creatine kinase levels of male and female U-17 National Team Athletes before and after a 6-week strength training. Material and Methods. 15 female and 15 male U-17 athletes, who previously participated in international competitions, participated in our study. Besides the hand grip power and creatine kinase values, age, height, weight, and BMI (body mass index) values of the athletes were measured before and after the training. As the conclusion of the measurements, the mean age of the female participant athletes was determined as 14,93 years, their mean height was 158,3 cm, and the mean age of the male athletes was 15,73 years, while their mean height was 173,1 cm. Results: As the conclusion of the measurements, it was determined that there were statistically significant differences between the right hand grip power and left hand grip power parameters of male and female participant athletes measured before and after the 6-week training. Moreover, it was determined that there were statistically significant differences between the pre-test and post-test measurements of creatine kinase values of both male and female athletes (p> 0,05). Conclusions. As the conclusion, it was determined that the 6-week strength trainings applied to U-17 Judo National Team athletes caused significant changes in their hand grip power and creatine kinase values. The significant results obtained from our study are considered to be originated from the duration, scope, frequency, severity, and content of the training. 

scholarly journals Implantation of Cardioverter-Defibrillator in Children With Long-QT Syndrome: Assessment of Indications, Efficacy, and Safety Based on 10-Year Experience

Kardiologiia ◽  
2018 ◽  
Vol 58 (12) ◽  
pp. 52-58 ◽  
Author(s):  
R. A. Ildarova ◽  
M. A. Shkolnikova ◽  
S. A. Termosesov
Keyword(s):  
Sudden Cardiac Arrest ◽  
Efficacy And Safety ◽  
Primary And Secondary Prevention ◽  
Icd Implantation ◽  
Age And Gender ◽  
Before And After ◽  
History Of ◽  
The Mean ◽  
High Doses ◽  
And Gender

Purpose: to assess specificities of course of the long­QT syndrome in children before and after implantation of cardioverter­defibrillator (ICD), and optimization of indications to ICD­therapy.Materials and methods. We included in this study 48 children with long­QT syndrome from 44 unrelated families (28 boys and 20 girls), who underwent ICD implantation at the mean age 11.8±3.8 years. Mean duration of follow­up after implantation was 5.2±2.8 years. Data from these children were compared with those from 59 children of comparable age and gender with long­QT syndrome from 46 unrelated families receiving antiarrhythmic therapy (β­adrenoblockers). We assessed clinical and electrocardiographic characteristics of the disease obtained at initial visit and their dynamics thereafter.Results. Children with long­QT syndrome and ICD were mainly probands with interval QT longer than 500 ms, recurrent syncope and often history of sudden cardiac arrest requiring high doses of β­adrenoblockers for control of ventricular tachyarrhythmias.Conclusion. ICD implantation is an effective and safe method both of primary and secondary prevention of sudden cardiac death in children with long­QT syndrome.

Assessment of Gender Dimorphism Using Cephalometry in Iranian Population

2020 ◽  
Vol 4 (4) ◽  
Author(s):  
Neda Ghaffari ◽  
Babak Ebrahimi ◽  
Zohreh Nazmara ◽  
Mostafa Nemati ◽  
Masoumeh Dodangeh ◽  
...  
Keyword(s):  
Calculated Data ◽  
Mean Value ◽  
Iranian Population ◽  
Cranial Capacity ◽  
Gender Dimorphism ◽  
Male And Female ◽  
Cranial Index ◽  
The Mean ◽  
And Gender ◽  
The Many

Abstract Cephalic indices is useful for evaluating racial and gender differences. In this study, we aimed to asses Gender Dimorphism Using cephalometry in the Iranian Population. Different variables like cranial length (CL), cranial width (CW), and cranial height (CH) were measured and cranial index (CI), cranial capacity (CC), and brain weight of 400 Iranian volunteers were calculated. Data were analyzed by means of SPSS 22.0. There were significant differences in the mean value of all nasofacial parameters (P<0.05). The highest sensitivity and specificity to predict the gender dimorphism were related to FL and FW (0.990 and 0.97) and (0.970 and 0.94), respectively. Considering the differences between male and female cranial structures, can be useful in forensic medicine and designing neurosurgical and ergonomic instruments in addition, to distinguish and discover the gender of the humans related to the many years ago.

Accumulated oxygen deficit measurements during and after high-intensity exercise in trained male and female adolescents

1997 ◽  
Vol 76 (6) ◽  
pp. 525-531 ◽  
Author(s):  
G. A. Naughton ◽  
J. S. Carlson ◽  
D. C. Buttifant ◽  
S. E. Selig ◽  
K. Meldrum ◽  
...  
Keyword(s):  
High Intensity ◽  
High Intensity Exercise ◽  
Oxygen Deficit ◽  
Female Adolescents ◽  
Male And Female ◽  
Accumulated Oxygen Deficit

Anaerobic capacity and muscle activation during horizontal and uphill running

1997 ◽  
Vol 83 (1) ◽  
pp. 262-269 ◽  
Author(s):  
Mark A. Sloniger ◽  
Kirk J. Cureton ◽  
Barry M. Prior ◽  
Ellen M. Evans
Keyword(s):  
Lower Extremity ◽  
Muscle Activation ◽  
Anaerobic Capacity ◽  
Magnetic Resonance Images ◽  
Muscle Volume ◽  
Treadmill Running ◽  
Oxygen Deficit ◽  
Before And After ◽  
The Mean ◽  
Exercise Induced

Sloniger, Mark A., Kirk J. Cureton, Barry M. Prior, and Ellen M. Evans. Anaerobic capacity and muscle activation during horizontal and uphill running. J. Appl. Physiol. 83(1): 262–269, 1997.—Anaerobic capacity as measured by the maximal or peak oxygen deficit is greater during uphill than during horizontal running. The objective of this study was to determine whether the greater peak oxygen deficit determined during uphill compared with horizontal running is related to greater muscle volume or mass activated in the lower extremity. The peak oxygen deficit in 12 subjects was determined during supramaximal treadmill running at 0 and 10% grade. Exercise-induced contrast shifts in magnetic resonance images were obtained before and after exercise and used to determine the percentage of muscle volume activated. The mean peak oxygen deficit determined for uphill running [2.96 ± 0.63 (SD) liters or 49 ± 6 ml/kg] was significantly greater ( P < 0.05) than for horizontal running (2.45 ± 0.51 liters or 41 ± 7 ml/kg) by 21%. The mean percentage of muscle volume activated for uphill running [73.1 ± 7.4% (SD)] was significantly greater ( P < 0.05) than for horizontal running (67.0 ± 8.3%) by 9%. The differences in peak oxygen deficit (liters) between uphill and horizontal running were significantly related ( y = 8.05 × 10−4 x + 0.35; r = 0.63, SE of estimate = 0.29 liter, P < 0.05) to the differences in the active muscle volume (cm3) in the lower extremity. We conclude that the higher peak oxygen deficit during uphill compared with horizontal running is due in part to increased mass of skeletal muscle activated in the lower extremity.

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