scholarly journals Acute effect of resisted sprinting upon regular sprint performance

2018 ◽  
Vol 23 ◽  
pp. 19
Author(s):  
Roland Van Den Tillaar ◽  
Amaro Teixeira ◽  
Daniel Marinho
Keyword(s):  
Body Mass ◽  
Acute Effect ◽  
Sprint Performance ◽  
Track And Field ◽  
The Other ◽  
Male Athletes ◽  
Resisted Sprinting ◽  
Positive Effect

The aim of this study was to investigate the acute effect of resisted sprinting upon running sprint performance. Thirty male athletes from track and field (age: 21.2±2.9 yrs, body mass: 69.8±9.8 kg, height: 1.75±0.08 m) performed two different test sessions (one day of 7×60 m runs alternating between regular and resisted sprinting and the other day 7×60 m of regular sprints) with 5 min between each run. Sled towing individually weighted to 10% of each participant’s body mass was used as resistance for the resisted sprints. It was found that training with or without resistance had the same effect; there is no acute effect of resisted sprinting upon sprint performance after using resisted runs. It was concluded that resisted sprinting does not have any acute positive effect upon regular sprints of 60 m, but only a fatiguing effect.

Effects of time-of-day on repeated sprint performance of aromatherapy massage applied young futsal players

2021 ◽  
Vol 15 (9) ◽  
pp. 4030-4035
Author(s):  
Ramazan Bayer ◽  
Özgür Eken
Keyword(s):  
Performance Improvement ◽  
Time Of Day ◽  
Sprint Performance ◽  
Single Group ◽  
Male Athletes ◽  
Sprint Time ◽  
Percent Change ◽  
Repeated Sprint ◽  
Research Protocols ◽  
Positive Effect

Background: Different protocols are applied in order to increase the performance of athletes in sports that include high-intensity activities such as futsal. Massage protocols applied before or after exercise are frequently used for performance improvement. The differences in oils used in the massage and the time of day may vary performance levels of the futsal players. Aim: This study was planned to determine the effects of time-of-day on repeated sprint performance of aromatherapy massage applied young futsal players. Methods: Twelve male athletes between the age of 18-25, who exercised regularly for five days a week and played futsal for at least 4 years, participated in the study (age, 20.50± 1.78 years; height, 171.92± 2.23 cm; 67.92 ± 2.42 kg; BMI 23.06±.77). The research protocols consisted of three different protocols as single group, non-massage protocol (NM), Swedish massage applied protocol (SM), and aromatherapy massage applied protocol (ATM). In addition, three measurements were taken for each protocol and measurements were made at different times of the day (09.00 in the morning; 13.00 in the afternoon; 17.00 in the evening). After each measurement, the Repetitive Sprint Test (RST) (6x20m) measurements of the athletes were taken. While evaluating RST results, the fastest sprint time (FS), total sprint time and percent change (PC) from the first sprint to the last sprint were calculated. Results: It was determined that there was a statistical difference between RST values observed at different times of the day after NM, SM and ATM protocols. In addition, among all protocols, ATM protocol was found to be more effective. Conclusion: It was determined that ATM had a positive effect on RST performance compared to NM and SM protocols and the ATM protocol applied in the evening was more effective than the ATM protocol applied in the morning and afternoon. Keywords: Futsal, Diurnal Variation, Aromatherapy Massage, Repetitive Sprint.

scholarly journals Influence of Strength Level on the Acute Post-Activation Performance Enhancement Following Flywheel and Free Weight Resistance Training

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7156
Author(s):  
Borja Sañudo ◽  
Moisés de Hoyo ◽  
G Gregory Haff ◽  
Alejandro Muñoz-López
Keyword(s):  
Resistance Training ◽  
Body Mass ◽  
Performance Enhancement ◽  
Group Analysis ◽  
Sprint Performance ◽  
Countermovement Jump ◽  
Back Squat ◽  
Free Weight ◽  
Before And After ◽  
Positive Effect

This study aimed to compare the post-activation potentiation performance enhancement (PAPE) response to the acute inertial flywheel (FW) and free weight resistance training (TRA) on subsequent countermovement jump (CMJ) and sprint performance (10 m sprint). This study used a randomized crossover design including twenty-eight healthy males that were divided into strong (relative one-repetition maximum (1RM) back squat > 2.0 × body mass) and weak (relative 1RM back squat < 2.0 × body mass) groups. All participants performed the following: (a) three reps at 90% of their 1RM back squat (TRA) and (b) three reps on an inertial FW (plus one repetition to initiate flywheel movement) with an intensity that generated a mean propulsive velocity equal to that achieved with 90% of the 1RM back squat. Before and after the conditioning activity, participants performed two CMJs and two 10 m sprints. Within-group analyses showed significantly greater CMJ (d > 0.9, p < 0.001) and sprint performance (d > 0.5, p < 0.05) in the FW and the TRA group. Between-group analysis showed that sprint changes were significantly greater in the FW-strong group when compared with the TRA (F1,18 = 5.11, p = 0.036, η2p = 0.221—large) group. These results suggest that using a squat activation protocol on a FW may lead to an acute positive effect on jump and sprint performance, especially in stronger individuals.

scholarly journals Backward Running: Acute Effects on Sprint Performance in Preadolescent Boys

Sports ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 55
Author(s):  
Dimitrios Petrakis ◽  
Eleni Bassa ◽  
Anastasia Papavasileiou ◽  
Anthi Xenofondos ◽  
Dimitrios A. Patikas
Keyword(s):  
Perceived Exertion ◽  
Acute Effect ◽  
Sprint Performance ◽  
Acute Effects ◽  
Warm Up ◽  
Sprint Speed ◽  
Significant Difference ◽  
Alternative Means ◽  
Rest Time ◽  
Positive Effect

The aim of this study was to examine the acute effect of backward running (BwR) during warm-up on a 20-m sprint of boys’ performance, compared to forward running (FwR). Fourteen recreationally active preadolescent boys (aged 12.5 ± 0.5 years) were examined in 3 protocols: warm-up (control condition), warm-up with 3 × 10 m additional BwR sprints and warm-up with 3 × 10 m additional FwR sprints. Participants were evaluated 4 minutes after each protocol on a 20-m sprint and intermediate distances, as well as the rate of perceived exertion (RPE). Sprint speed across 10-20 m was significantly higher for the BwR warm-up compared to the regular warm-up (p < 0.05) and a significantly higher RPE after the BwR and FwR protocols compared to the control condition was recorded (p < 0.05). No significant difference was detected across the distances 0–5, 5–10, 0–10 and 0–20 m. Although adding 3 × 10-m sprints of BwR or FwR after the warm-up did not enhance performance in a 20 m sprint of preadolescent boys, the positive effect of BwR across 10–20 m distance suggests that BwR could be an alternative means for enhancing performance for certain phases of a sprint for this age. However, preadolescent boys’ response to different sprint conditioning exercise stimuli and the optimization of rest time to maximize performance remain to be determined.

scholarly journals Comparison of Different Sprint Training Sessions with Assisted and Resisted Running: Effects on Performance and Kinematics in 20-m Sprints

2017 ◽  
Vol 18 (2) ◽  
Author(s):  
Roland Van Den Tillaar ◽  
Erna Von Heimburg
Keyword(s):  
Step Length ◽  
Acute Effect ◽  
Sprint Performance ◽  
Sprint Training ◽  
Single Session ◽  
Vertical Stiffness ◽  
Team Handball ◽  
And Performance ◽  
Positive Effect ◽  
Small Positive Effect

AbstractThe purpose was to examine whether there is a positive acute effect of resisted and assisted sprinting on the kinematics and performance of regular 20-m sprints.The total of 15 female team handball players were involved in a counterbalanced crossover design three sprint sessions consisting of (1) seven normal 20-m sprints, (2) seven sprints alternating normal and resisted sprints, and (3) seven sprints alternating between normal and either resisted or assisted sprints in a single session.The main finding was that only resisted sprints had an effect on the first normal 20-m sprint. However, this was only the case after one resisted run (from 3.59 to 3.54 s; 2% improvement). Using several resisted sprints did not have any positive effect upon the normal sprints, but probably caused fatigue, as shown in the increased contact times and decreased vertical stiffness, step length, and rate. Assisted running did not cause any changes to the normal sprints.Resisted sprints can cause a positive effect in normal 20-m sprint performance (2%) after the use of one resisted effort in team handball players. However, the small positive effect is negated if several resisted efforts are performed, causing more fatigue than a positive response. Therefore, it is recommended that multiple resisted sprint efforts are not performed when seeking to enhance 20-m sprint performance in these athletes.

The Determinants of Capital Adequacy Ratio: The Case of the Vietnamese Banking System in the Period 2011-2015

2017 ◽  
Vol 33 (2) ◽  
Author(s):  
Ngoc Anh Nguyen
Keyword(s):  
Banking System ◽  
Precious Metals ◽  
Capital Adequacy ◽  
The Other ◽  
Total Asset ◽  
Data Set ◽  
Hand Size ◽  
Net Interest Margin ◽  
Capital Adequacy Ratio ◽  
Positive Effect

The analysis of a data set of observation for Vietnamese banks in period from 2011 - 2015 shows how Capital Adequacy Ratio (CAR) is influenced by selected factors: asset of the bank SIZE, loans in total asset LOA, leverage LEV, net interest margin NIM, loans lost reserve LLR, Cash and Precious Metals in total asset LIQ. Results indicate based on data that NIM, LIQ have significant effect on CAR. On the other hand, SIZE and LEV do not appear to have significant effect on CAR. Variables NIM, LIQ have positive effect on CAR, while variables LLR and LOA are negatively related with CAR.

The effects of long-term vigorous endurance exercise on the coronary arteries

2019 ◽  
Vol 67 (2) ◽  
Keyword(s):  
Endurance Training ◽  
Coronary Atherosclerosis ◽  
Calcium Score ◽  
The Other ◽  
Disease Phenotype ◽  
Male Athletes ◽  
Artery Disease ◽  
Future Work ◽  
Summary Data

Moderate endurance training is known to improve cardiovascular risk factors, and prolongs life expectancy. On the other hand, there has been some discussion whether “too much” exercise might have a contrarious effect by accelerating coronary atherosclerosis. The goal of this review was to evaluate the current literature on the effects of long-term vigorous endurance training on the coronary vasculature. In summary, data point to an increased calcium score, and a higher burden of atherosclerotic plaque in male athletes compared to sedentary controls. However, the plaques found in athletes were more prone to be calcified. The pathogenesis and clinical relevance of this athlete coronary artery disease phenotype remains incompletely understood and represents an area of important future work.

The effects of long-term vigorous endurance exercise on the coronary arteries

2019 ◽  
Vol 67 (2) ◽  
Keyword(s):  
Endurance Training ◽  
Coronary Atherosclerosis ◽  
Calcium Score ◽  
The Other ◽  
Disease Phenotype ◽  
Male Athletes ◽  
Artery Disease ◽  
Future Work ◽  
Summary Data

Moderate endurance training is known to improve cardiovascular risk factors, and prolongs life expectancy. On the other hand, there has been some discussion whether “too much” exercise might have a contrarious effect by accelerating coronary atherosclerosis. The goal of this review was to evaluate the current literature on the effects of long-term vigorous endurance training on the coronary vasculature. In summary, data point to an increased calcium score, and a higher burden of atherosclerotic plaque in male athletes compared to sedentary controls. However, the plaques found in athletes were more prone to be calcified. The pathogenesis and clinical relevance of this athlete coronary artery disease phenotype remains incompletely understood and represents an area of important future work.

The Effects of Online Assignments and Weekly Deadlines on Student Outcomes in a Macroeconomics Course

2020 ◽  
pp. 056943452096825
Author(s):  
Laurie A. Miller ◽  
James R. Schmidt
Keyword(s):  
Student Retention ◽  
Adaptive Learning ◽  
Student Outcomes ◽  
Knowledge Retention ◽  
The Other ◽  
Student Knowledge ◽  
Final Exam ◽  
Online Assignments ◽  
Positive Effect ◽  
Jel Classifications

This study examined how weekly, externally set deadlines affected the completion of adaptive learning assignments and student outcomes in an introductory macroeconomics course. We imposed different deadline schemes for the same adaptive learning assignments in two sections of the course. One section was given flexible deadlines and the other section was given rigid weekly deadlines. We found that weekly deadlines did not affect assignment completions or total points earned on unit exams. We investigated how the adaptive learning assignments affected student retention of material. A measure of staying on pace in the course provided a positive effect on the comprehensive final exam for students with weekly deadlines. The weekly deadlines may not have influenced assignment completions but consistent engagement with the flow of topics through the course increased student knowledge retention. Regardless of deadline type, completions of adaptive learning assignments positively affected outcomes on the unit exams and final exam. JEL Classifications: A20, A22

scholarly journals The Repercussion of Ai Chi on Aged People’s Balance

2014 ◽  
Vol 4 (3) ◽  
pp. 247-256
Author(s):  
Pablo Javier Olabe Sánchez ◽  
Andrés Martínez-Almagro Andreo
Keyword(s):  
Fall Prevention ◽  
Controlled Trial ◽  
Intervention Group ◽  
The Other ◽  
Control Group ◽  
Aged People ◽  
Randomized Controlled ◽  
Risk Of Fall ◽  
And Control ◽  
Positive Effect

To practice strength and balance activities are shown as useful tools to fall prevention by diverse metanalysis. On the other side, aquatic environment offers interesting properties for a therapeutic reeducation, being the Ai Chi one of its applications. Aim: To evaluate the repercussion of an Ai Chi programme on aged people’s balance. Method: A randomized controlled trial was developed comparing two groups formed by aged people with risk of fall according to the Timed Up & Go test. Intervention Group (IG) followed twelve Ai Chi sessions combined with their thermal programme; and Control Group (CG) just followed the thermal programme. Both groups spent two weeks in the Balneario of Archena (Murcia, Spain). Results: Both groups improve their balance; however, only the IG reached the non-risk of fall from the Timed Up & Go test. Conclusions: The combination of Ai Chi sessions and a thermal programme had a positive effect on aged people’s balance, showing a therapeutic and clinical relevance.

scholarly journals Weaning Holstein Calves at 17 Weeks of Age Enables Smooth Transition from Liquid to Solid Feed

Animals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1132
Author(s):  
Sarah Schwarzkopf ◽  
Asako Kinoshita ◽  
Jeannette Kluess ◽  
Susanne Kersten ◽  
Ulrich Meyer ◽  
...  
Keyword(s):  
Metabolic Stress ◽  
Live Weight ◽  
The Other ◽  
Smooth Transition ◽  
Blood Metabolites ◽  
Positive Effects ◽  
Weaning Age ◽  
Holstein Calves ◽  
Positive Effect ◽  
Over Time

Development of calves depends on prenatal and postnatal conditions. Primiparous cows were still maturing during pregnancy, which can lead to negative intrauterine conditions and affect the calf’s metabolism. It is hypothesized that weaning calves at higher maturity has positive effects due to reduced metabolic stress. We aimed to evaluate effects of mothers’ parity and calves’ weaning age on growth performance and blood metabolites. Fifty-nine female Holstein calves (38.8 ± 5.3 kg birth weight, about 8 days old) were used in a 2 × 2 factorial experiment with factors weaning age (7 vs. 17 weeks) and parity of mother (primiparous vs. multiparous cows). Calves were randomly assigned one of these four groups. Live weight, live weight gain and morphometry increased over time and were greater in calves weaned later. Metabolic indicators except total protein were interactively affected by time and weaning age. Leptin remained low in early-weaned calves born to primiparous cows, while it increased in the other groups. The results suggest that weaning more mature calves has a positive effect on body growth, and calves born to primiparous cows particularly benefit from this weaning regimen. It also enables a smooth transition from liquid to solid feed, which might reduce the associated stress of weaning.

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